Diagnostika OBD1 Ford
Accessing Trouble Codes
Using Analog Voltmeter
Exc. EEC-V, DI 7.3L Turbo Diesel - Villager
Connect analog voltmeter to data link connector located in engine compartment. When a diagnostic trouble code is reported on the analog voltmeter for a functional test, it will represent itself as a pulsing or sweeping movement of the voltmeters needle across the dial face.
Accessing diagnostic trouble codes. Use the Analog voltmeter or Test light method, not both.
Using Check Engine/ MIL
Exc DI 7.3L Turbo Diesel, Merkur (2.9L), Villager - 85-88 2.3L Engine
The MIL lamp is intended to alert the driver of certain malfunctions in the engine control system. If such a fault occurs, the EEC-IV processor will substitute a value or values and continue operating. In some cases this action may result in a slight change in vehicle driveability.
The Check Engine lamp can be used to read DTCs. The instrument panel Check Engine lamp will remain on when a hard fault is present. During the Self test sequence, a DTC is reported by the Check Engine lamp. It will represent itself as a flash on the Check Engine lamp display on the instrument panel. A single digit number of three will be reported by three flashes. However, as previously stated, a DTC is represented by a two digit number, such as 2-3. As a result, DTC 2-3 will appear on the Check Engine lamp display as two flashes, then after a two second pause, the lamp will flash three times.
DTC interpretation. Check engine lamp
Continuous Memory DTCs are separated from Key On Engine Off DTCs by a six second delay, a single half second flash, then another six second delay.
Villager
- Disconnect Diagnostic Test Connector (DTC) located on LH side of engine compartment, on transaxle behind coolant reservoir.
- Using suitable jumper wire, jump BL/W and GY/BL wires.
Accessing DTCs. MIL
-
- Wait about two seconds.
- Remove jumper wire and reconnect DTC.
- Record DTCs by reading MIL flashes.
Using Message Center
Continental
- Using electronic instrument cluster, hold in all three buttons (select, checkout and reset buttons) at same time.
- To conduct Key-ON/Engine-OFF (KOEO) Self test portion, hold in all three buttons and turn ignition On, then release three buttons.
- To conduct Key-ON/Engine-Running (KOER) Self test portion, hold in all three buttons, turn ignition On and release three buttons.
- On 87-90 models, press select button three times
- On 91-95 models, depress gauge select button three times until DEALER 4 is displayed.
- On all models, to initiate Self test, using a jumper wire, jump self test connectors STI to SIG RTN.
Accessing DTCs. Message center See Image above
-
- On 87-90 models, a base readout of 4255 indicates that KOEO self test has been entered.
- On 87-90 models, a base readout of 4030 indicates engine running self test has been entered.
- On 87-90 models, DTC output will be the RH three digits displayed. Service pass code is 4011.
- On 91-97 models, DTCs will be displayed on message center.
- On all models, to exit Self test, turn ignition Off.
Using Overdrive Cancel/Transmission MIL (OCIL/TMIL)
On 89-98 models equipped with 7.3L diesel engine and E4OD transmission, perform KOEO Self Test if the OCIL/TMIL lamp flashes. The lamp stays off when OSC is toggled once to indicate vehicle can attain overdrive gear position. The lamp stays on when OSC is toggled to prevent vehicle from shifting into overdrive position. DTC 99 indicates a fault in the E4OD transmission Electronic Pressure Control (EPC) circuit. Under this condition, the lamp serves as the Transmission Malfunction Indicator Lamp (TMIL).
Clearing Codes
Except MCU System
EEC-V - DI 7.3L Turbo Diesel
The PCM can be reset using the New Generation Star (NGS) Tester or by disconnecting the battery ground cable for five minutes. If the battery ground cable was disconnected to clear DTCs, the vehicle may operate rough for the first few miles until adaptive values are relearned.
EEC-IV Continuous Memory
1. Perform KOEO self test.
2. When DTCs begin to display, deactivate self test as follows:
a. STAR tester, position center button in up position. b. Analog Volt/Ohmmeter, remove jumper wire from self test input connector and signal return pin of self test connector. c. NGS tester, depress STOP button. d. Check engine lamp, remove jumper wire from self test input connector and signal return pin of self test connector. e. Message center, remove jumper wire from self test input connector and signal return pin of self test connector. f. OCIL, remove jumper wire from self test connector and signal return pin of self test connector.3. Continuous DTCs should now be erased.
Keep Alive Memory (KAM)
To clear keep alive memory, disconnect and isolate negative battery cable for a minimum of five minutes. After clearing memory, it is necessary to drive vehicle a minimum of 10 miles to allow processor time to relearn value.Merkur 2.9L - 85-88 2.3L Engine
1. Initiate KOEO self test. 2. Remove jumper wire from self test input terminal as soon as first diagnostic trouble code is received (even if an 11 is the first DTC). 3. Repeat self test with jumper wire to verify DTCs have been erased.
Aspire, Capri (1.6L), Escort - Tracer (1.8L), Probe (2.0L w/4EAT, 2.2L - 2.5L) - 88-93 Festiva
1. Initiate KOEO self test.2. Unlatch push button on Super Star II Tester as soon as first diagnostic trouble code is received.
3. Disconnect and isolate battery ground cable, then depress brake pedal for 5-10 seconds.
4. Conduct self test to ensure DTCs have been erased.
Villager
Except Malfunction Indicator Lamp
DTCs may be erased using one of two methods. Disconnect battery ground cable, DTCs will be erased from back-up memory after 24 hours. When using NGS tester, select Diagnostic Test Mode Results, then depress CLEAR.
Malfunction Indicator Lamp
1. Activate diagnostic test mode.
2. Disconnect DTC.
3. Using suitable jumper wire, jump BL/W and GY/BL wires.
4. Wait about two seconds.
5. Remove jumper wire and reconnect DTC.
6. MIL will stay on, and DTCs will be erased.
MCU System
To clear DTCs, turn ignition Off. MCU system does not have KAM to retain service DTCs
Also see this page EEC IV Diagnostic page for more Ford information.
Ford Trouble Codes
| 88-95 | 1.3L EFI, 1.6L, 1.8L, 2.0L w/4EAT - 2.5L |
| 93-95 | probe |
| 93-95 | EEC Villager |
| 96-97 | 1.3L EFI, 1.8L - 2.5L |
| 96-01 | OBD2/MIL |
| EEC | 1.3L FBC Engine exc. Villager |
| EEC-IV | EEC-IV/OBD2 |
| EEC-V | EEC-V/OBD2 |
| MCU | MCU |
| 7.3L Turbo Diesel |
(R) = Engine Running test (M) = Memory code (O)=Key On Engine Off test
| | | 2 Digit Codes |
| 11 | | System OK |
| 12 |
| Idle Speed Control motor or Air Bypass not controlling idle properly (generally idle too low) - ISC |
| 13 | (O) | ISC did not respond properly (extends to touch throttle then retracts for KOEO) - ISC |
|
| (R) | Idle Speed Control motor or Air Bypass not controlling idle properly (generally idle too high) |
|
| (M) | ISC sticking, open ITS circuit or TP sticking |
| 14 |
| Ignition pickup (PIP) was erratic - Ignition Systems |
|
|
| E4OD Transmission diesel RPM sensor - Diesel RPM sensor |
| 15 | (O) | No Keep Alive Memory power to PCM pin 1 or bad PCM (Memory Test Failure) |
|
| (M) | KAM (pin 1) was interrupted (was battery disconnected ?) |
| 16 |
| 1 9L - 2 5L - Throttle stop set too high - IDLE or Idle Set Procedures |
|
|
| 2 3L - RPM's too low - IDLE |
|
| (O) | Electronic ignition - IDM circuit fault - Ignition Systems |
| 17 |
| 1 9L - 2 5L - Throttle stop set too low - IDLE |
| 18 | (R) | Check base timing - advance function - Timing Tests |
|
| (M) | Ignition TACH signal erratic - Ignition Systems |
|
|
| Spark Angle Word (SAW) circuit failure (1 9L SFI) |
| 19 | (O) | No Vehicle Power (pins 37 + 57) or bad PCM VPWR Diagnosis |
|
| (R) | Erratic idle during test (reset throttle - retest) - Idle Set Procedures |
|
|
| Electronic ignition Cylinder ID sensor/circuit problem - Ignition Systems |
| 21 |
| Engine Coolant Temperature (ECT) sensor out of range - ECT |
| 22 |
| MAP (vacuum) or BARO signal out of range - MAP |
| 23 |
| Throttle sensor out of range or throttle set too high - TPS |
| 24 |
| Intake Air Temperature (IAT) or Vane Air Temperature (VAT) sensor out of range - IAT VAT |
| 25 |
| Knock sensor not tested (ignore if not pinging) - KS |
| 26 |
| Mass Air Flow (MAF) or Vane Air Flow (VAF) out of range - MAF VAF |
|
|
| Transmission Oil Temperature (TOT) sensor out of range, Transmissions |
| 27 |
| Vehicle Speed Sensor problem - VSS |
| 28 |
| Vane Air Temperature (VAT) sensor out of range - VAT |
|
|
| 2 3L w/Electronic Ignition - Cyl ID, IDM low or right coil pack failure - Ignition Systems |
| 29 |
| Vehicle Speed Sensor problem - VSS |
| 31 | (O,R,M) | EVP - EVP signal is/was out of range - EVP |
|
| (O,R,M) | EVR - EVP signal is/was low - EVR |
|
| (O,R,M) | PFE - PFE signal is/was low - PFE |
| 32 | (R) | EVP - EGR not responding properly during test - EVP |
|
| (O,R,M) | EVR - EVP signal is/was low - EVR |
|
| (R,M) | PFE - PFE shows low pressure, EGR not seating or memory, not seating intermittently - PFE |
| 33 | (O,M) | ALL - EGR did not open/ respond during test or if memory code, did not open intermittently - EVP EVR PFE |
| 34 | (R) | EVP - EGR did not respond properly during test - EVP |
|
| (O,R,M) | EVR - EVP sensor is/was high - EVR |
|
| (O,R,M) | PFE - PFE sensor is/was out of range - PFE |
| 35 | (R) | EVP - Engine RPM's too low to test EGR system - EVP |
|
| (O,R,M) | EVR - EVP sensor signal is/was high - EVR |
|
| (O,R,M) | PFE - PFE sensor signal is/was high - PFE |
| 38 |
| Idle Tracking Switch signal was intermittent - ISC |
| 39 |
| Transmission Torque Converter clutch not engaging - Transmissions |
| 41 | (R) | System lean - Fuel control |
|
| (M) | System was lean for 15 seconds or more (no HO2S switching) - Fuel control |
| 42 | (R) | System rich - Fuel control |
|
| (M) | System was rich for 15 seconds or more (no HO2S switching) - Fuel control |
| 43 | (R) | HO2S sensor not reading (run at 2000 rpm's for 2 minutes and retest - check for HO2S switching) |
|
| (M) | Was lean at WOT for 3 seconds or more - Fuel control |
| 44 |
| AIR system inoperative - Air Injection |
| 45 |
| AIR not Diverting (AIRD) - Air Injection |
|
|
| Electronic Ignition - coil primary circuit failure - Ignition Systems |
| 46 |
| AIR Bypass (AIRB) not working - Air Injection |
|
|
| Electronic Ignition - primary circuit failure coil 2 - Ignition Systems |
| 47 |
| Low flow unmetered air (check for small vacuum leaks, injector o'rings, gaskets etc ) |
|
|
| E4OD transmission 4x4 switch/circuit problem - Transmissions |
| 48 |
| High flow unmetered air (check for large vacuum leak, inlet hoses etc ) |
|
|
| Electronic Ignition - coil primary circuit failure - Ignition Systems |
| 49 |
| Electronic Ignition - spout signal circuit problem - Ignition Systems |
|
|
| Transmission 1/2 shift problem - Transmissions |
| 51 |
| Engine Coolant Temperature (ECT) sensor signal is/was too high - ECT |
| 52 |
| Power Steering Pressure Switch/circuit open - PSP |
|
| (R) | Did you turn wheel during test ? |
| 53 |
| Throttle Position sensor too high - TPS |
| 54 |
| Intake Air Temperature (IAT) or Vane Air Temperature (VAT) signal high - IAT VAT |
| 55 |
| No or low (under 7 5 V) Key Power to PCM pin 5 |
| 56 |
| Vane Air Flow (VAF) or Mass Air Flow (MAF) sensor high - VAF MAF |
|
|
| Transmission Oil Temperature sensor too high - Transmissions |
| 57 |
| Intermittent in Park/Neutral/ Switch or Neutral Pressure switch circuit - PNP or Transmissions |
| 58 |
| Idle Tracking Switch (ITS) signal problem ISC |
|
|
| Vane Air Temperature (VAT) sensor out of range or open - VAT |
| 59 |
| AXOD 4/3 circuit fault - Transmissions |
|
|
| 3 0L SHO - Low speed fuel pump circuit problem - Power / Fuel Pump Circuits |
|
|
| Transmission 2/3 shift problem - Transmissions |
| 61 |
| Engine Coolant Temperature (ECT) sensor is or was too low - ECT |
| 62 |
| AXOD (KOEO only) 3/2 circuit short to ground - Transmissions |
|
|
| AXOD (KOEO AND KOER) 4/3 circuit failure - Transmissions |
|
|
| E4OD excessive converter clutch slippage - Transmissions |
| 63 |
| Throttle Position Sensor (TPS) signal too low TPS |
| 64 |
| Intake Air Temperature (IAT) or Vane Air Temperature (VAT) signal low or grounded - IAT VAT |
| 65 |
| Check intermittent HO2S (signal or ground) - Fuel Control |
|
| (R) | E4OD truck - cycle OD cancel switch after engine ID is received - Transmissions |
|
|
| 1984 3 8L ONLY - O, M Battery voltage high (check for electrical system overcharging) |
| 66 |
| Vane Air Flow (VAF) or Mass Air Flow (MAF) signal low - VAF MAF |
|
|
| Transmission Oil Temperature (TOT) signal low (possibly grounded) - Transmissions |
| 67 |
| Park/Neutral circuit fault - PNP |
|
|
| Transmission Manual Lever Position (MLP) sensor circuit - Transmissions |
|
| (M) | Intermittent Park Neutral Position (PNP) sensor fault - PNP |
| 68 |
| Idle Tracking Switch (ITS) circuit (possibly grounded) - ISC |
|
|
| Vane Air Temperature (VAT) sensor out of range or grounded - VAT |
|
|
| 3 8L AXOD -Transmission Temperature Switch (TTS) open - Transmissions |
|
|
| Electronic Transmission - Transmission Oil Temperature (TOT) sensor was overheated -Transmissions |
| 69 |
| AXOD transmission (O) 3/2 switch closed (possible short circuit) - Transmissions |
|
|
| AXOD (M) 3/2 switch open (poss short to power) - Transmissions |
|
|
| E4OD 3/4 shift problem - Transmissions |
| 70 | (M) | 3 8L AXOD - Data link to instrument cluster fault Service any other EEC codes, erase memory and retest If code is still present refer to instrument cluster diagnosis manual |
| 71 | (M) | 1 9L TBI, 2 3L TBI, 2 5L TBI - ITS signal was grounded when throttle should have been opening ITS-ISC ISC motor problem or Idle Tracking Switch (ITS) signal wire shorted to ground - ISC |
|
| (M) | 1 9L MFI - PCM re-initialized Possible electrical noise, case ground or intermittent VPWR problem - VPWR Diagnosis |
|
| (M) | 3 8L AXOD - Data link to instrument cluster fault - See code 70 |
| 72 | (R) | No MAP or MAF change in goose test - retest, check for frequency or voltage change - MAP MAF |
|
| (M) | 1 9L MFI - VPWR circuit to PCM was intermittent - VPWR Diagnosis |
|
| (M) | 2 3L T/C - PCM re-initialized Possible electrical noise, case ground or intermittent VPWR problem - VPWR Diagnosis |
|
| (M) | 3 8L AXOD - Message center data link circuit fault - See code 70 |
| 73 | (O) | Rerun test, if 73 is still output replace TPS |
|
| (R) | No Throttle Position Sensor (TPS) change in goose test Must get at least 25% throttle rotation - TPS |
| 74 |
| Was brake depressed after engine ID was received ? |
|
|
| Brake On Off (BOO) signal open or short to ground - BOO |
| 75 |
| Brake On Off (BOO) signal shorted to power - BOO |
| 76 |
| Vane Air Flow (VAF) did not respond to goose test - VAF |
| 77 |
| System did not receive goose test - see TESTS |
| 78 | (M) | VPWR circuit to PCM was intermittent or the PCM is bad VPWR Diagnosis |
| 79 |
| A/C is on or pin 10 is shorted to power |
| 81 |
| Boost control solenoid - Solenoids |
|
|
| AIRD solenoid - Solenoids and Air Injection |
|
|
| 3 0L SHO - Inlet Air Solenoid - Solenoids |
| 82 |
| 2 3L TC - Fan Control wire shorted to ground - A/C and Fan Circuits |
|
|
| AIRB solenoid - Solenoids and Air Injection |
|
|
| 3 8L SC - Super Charger Bypass Solenoid - Solenoids |
| 83 |
| High Electro Drive Fan circuit fault - A/C and Fan Circuits |
|
|
| EGR Control solenoid - Solenoids |
|
|
| 3 0L SHO - Low Speed Fuel Pump Relay circuit - Power / Fuel Pump Circuits |
| 84 |
| EGR Vacuum Regulator - Solenoids |
|
|
| EGR cutoff solenoid - Solenoids |
|
|
| EGR Vent solenoid - Solenoids |
| 85 |
| 2 3L T/C Automatic - 3/4-4/3 Shift solenoid - Transmissions |
|
|
| CANP solenoid (ALL 1989) - Solenoids |
|
| (M) | 1 9L MFI - System has corrected rich condition - Fuel control |
| 86 |
| 2 3L or 2 9L Truck - A4LD 3/4 shift solenoid - Transmissions |
|
|
| (M) 1 9L MFI - System has corrected lean condition - Fuel control |
| 87 | (O) | Fuel pump circuit fault (check inertia switch) - Power / Fuel Pump Circuits |
|
|
| Vehicles with 2BBL carb - Temperature Compensated Accelerator Pump Solenoid - Solenoids (M) intermittent in fuel pump primary circuit - Power / Fuel Pump Circuits NOTE: On some Escorts with automatic seat belts this code is normal IN MEMORY due to the wiring |
| 88 |
| Throttle Kicker Solenoid - Solenoids |
|
|
| Variable Voltage Choke relay circuit fault - VVC |
|
|
| Fan Control circuit fault - A/C and Fan Circuits |
|
|
| A4LD - Converter Clutch Override solenoid - Transmissions |
|
|
| Electronic Ignition - IDM, DPI or spout circuit fault - Ignition Systems |
| 89 |
| A4LD - Converter Clutch Override solenoid - Transmissions |
|
|
| AXOD Torque Converter Control solenoid circuit - Transmissions |
|
|
| Exhaust Heat Control (heat riser) solenoid circuit - Solenoids |
| 91 | (R, M) | System running lean - Fuel control |
|
|
| Transmission SS 1 circuit/solenoid problem - Transmissions |
| 92 | (R) | System running rich - Fuel control |
|
|
| Transmission SS 2 circuit/solenoid problem - Transmissions |
| 93 | (O,R) | Throttle linkage binding or bad ISC motor ISC HO2S not reading Fuel control |
|
| | Transmission TCC circuit/solenoid problem - Transmissions |
| 94 |
| AIR system inoperative - Air Injection |
|
|
| Transmission TCC circuit/solenoid problem - Transmissions |
| 95 | (O) | Fuel pump: open, bad ground or always on - Power / Fuel Pump Circuits |
|
| (R) | AIR not Diverting (AIRD) - Air Injection |
|
| (M) | Possible bad fuel pump ground or open between fuel pump and pin 8 at PCM (Fuel Pump Monitor signal) - Power / Fuel Pump Circuits |
| 96 | (O) | Fuel pump monitor circuit shows no power - Power / Fuel Pump Circuits |
|
| (R) | AIR Bypass (AIRB) not working - Air Injection |
|
| (M) | (Service 87 code first if present) Fuel pump relay or battery power feed was open - Power / Fuel Pump Circuits |
| 97 |
| E4OD OD cancel light circuit failure - Transmissions |
| 98 | (R) | Did not pass KOEO yet (Get 11 in KOEO first) |
|
|
| Transmission EPC circuit/solenoid failure - Transmissions |
| 99 | (R) | ISC needs to learn (Let idle for 2 minutes, Erase memory and retest) |
|
|
| Transmission EPC circuit/solenoid failure - Transmissions |
(R) = Engine Running test (M) = Memory code (O)=Key On Engine Off test
| 3 Digit codes | ||
| 111 |
| System checks OK |
| 112 | (O,M) | Intake Air Temperature (IAT) sensor is/was low or grounded - IAT |
| 113 | (O,M) | IAT sensor is/was high or open - IAT |
| 114 | (O,R) | IAT sensor out of range - IAT |
| 116 | (O,R) | Engine Coolant (ECT) sensor out of range - ECT |
| 117 | (O,M) | ECT sensor is/was low or grounded - ECT |
| 118 | (O,M) | ECT sensor is/was high or open - ECT |
| 121 | (O,R,M) | Throttle Position (TP) sensor out of range - TPS |
| 122 | (O,M) | TP low (possibly grounded or open circuit) - TPS |
| 123 | (O,M) | TP is/was high or short to power - TPS |
| 124 | (M) | TP voltage was higher than expected - Fuel control |
| 125 | (M) | TP voltage was lower than expected - Fuel control |
| 126 | (O,R,M) | MAP or BARO sensor out of range - >MAP |
| 128 | (M) | MAP vacuum has not been changing - check vacuum lines - >MAP |
| 129 | (R) | No MAP or Mass Air Flow sensor change during goose test - MAP MAF |
| 136 | (R) | Oxygen sensor not switching/system lean Left or Front HO2S - Fuel control |
| 137 | (R) | Oxygen sensor not switching/system rich Left or Front HO2S - Fuel control |
| 138 | (R) | Fault in Cold Start Injector circuit - Fuel control |
| 139 | (M) | Oxygen sensor not switching Left or Front HO2S - Fuel control |
| 144 | (M) | Oxygen sensor not switching Single, Right or Rear HO2S - Fuel control |
| 157 | (R,M) | Mass Air Flow signal is/was low or grounded - MAF |
| 158 | (O,R,M) | MAF sensor is/was high or short to power - MAF |
| 159 | (O,R) | MAF sensor is/was out of range - MAF |
| 167 | (R) | No Throttle Position sensor change in goose test (must get at least 25% rotation) - TPS |
| 171 | (M) | Oxygen sensor not switching - system was at adaptive limits - Single, Right or Rear HO2S - Fuel control |
| 172 | (R,M) | Oxygen sensor not switching - system is or was lean - Single, Right or Rear HO2S - Fuel control |
| 173 | (R,M) | Oxygen sensor not switching - system is or was rich - Single, Right or Rear HO2S - Fuel control |
| 174 | (M) | Oxygen sensor was slow in switching Single, Right or Rear HO2S - Fuel control |
| 175 | (M) | Oxygen sensor not switching - system was at adaptive limits - Left or Front HO2S - Fuel control |
| 176 | (M) | Oxygen sensor not switching - system is or was lean Left or Front HO2S - Fuel control |
| 177 | (M) | Oxygen sensor not switching - system was rich Left or Front HO2S - Fuel control |
| 178 | (M) | Oxygen sensor was slow in switching Left or Front HO2S - Fuel control |
| 179 | (M) | Fuel system was rich at part throttle Single, Right or Rear HO2S - Fuel control |
| 181 | (M) | Fuel system was lean at part throttle Single, Right or Rear HO2S - Fuel control |
| 182 | (M) | Fuel system was rich at idle Single, Right or Rear HO2S - Fuel control |
| 183 | (M) | Fuel system was lean at idle Single, Right or Rear HO2S - Fuel control |
| 184 | (M) | Mass Air (MAF) output higher than expected - Fuel control |
| 185 | (M) | Mass Air (MAF) output lower than expected - Fuel control |
| 186 | (M) | Injector pulse width longer than expected or Mass Air Flow (MAF) lower than expected - Fuel control |
| 187 |
| Injector pulse width shorter than expected or Mass Air Flow (MAF) higher than expected - Fuel control |
| 188 | (M) | Fuel system was rich at part throttle - Left or Front HO2S - Fuel control |
| 189 | (M) | Fuel system was lean at part throttle - Left or Front HO2S - Fuel control |
| 191 | (M) | Fuel system was rich at idle - Left or Front HO2S - Fuel control |
| 192 | (M) | Fuel system was lean at idle - Left or Front HO2S - Fuel control |
| 193 |
| Failure in Flexible Fuel (FF) sensor circuit - Fuel control |
| 194 | (M) | Perform cylinder balance test to check for inoperative injectors |
| 195 | (M) | Perform cylinder balance test to check for inoperative injectors |
| 211 | (M) | Ignition PIP signal was erratic or missing - Ignition Systems |
| 212 | (M) | Ignition TACH signal was erratic (module/wiring) or SPOUT circuit fault - Ignition Systems |
| 213 | (R) | Ignition SPOUT or SAW circuit open or shorted - Ignition Systems |
| 214 | (M) | Error in Cylinder ID (CID) circuit or signal - Ignition Systems |
| 215 | (M) | Primary circuit failure - ignition coil 1 - Ignition Systems |
| 216 | (M) | Primary circuit failure - ignition coil 2 - Ignition Systems |
| 217 | (M) | Primary circuit failure - ignition coil 3 - Ignition Systems |
| 218 | (M) | IDM signal open or high or left coil pack failure - Ignition Systems |
| 219 | (M) | SPOUT circuit failure, timing defaulted to 10 degrees - follow code 213 diagnosis |
| 222 | (M) | IDM open or high or right coil pack failure - Ignition Systems |
| 223 | (M) | Dual Plug (DPI), SPOUT or IDM circuit fault - Ignition Systems |
| 224 | (M) | Failure in ignition coil primary circuit - Ignition Systems |
| 225 | (R) | Knock sensor not tested (ignore if not pinging) - KS |
| 226 | (O) | Ignition Diagnostic Monitor (IDM) signal fault - Ignition Systems |
| 232 | (M) | EI primary coil circuit failure - Ignition Systems |
| 238 | (M) | EI primary circuit failure - ignition coil 4 - Ignition Systems |
| 311 | (R) | AIR system not working - Single, Right or Rear HO2S - Air Injection |
| 312 | (R) | AIR not diverting - Air Injection |
| 313 | (R) | AIR not bypassing - Air Injection |
| 314 | (R) | AIR inoperative, Left or Front HO2S - Air Injection |
| 326 | (R,M) | Pressure Feedback EGR shows low pressure EGR not seating or not seating intermittantly - PFE |
| 327 | (O,R,M) | EGR feedback signal is/was low - EVR or PFE |
| 328 | (O,R,M) | EGR Valve Position (EVP) is/was low - EVR |
| 332 | (R,M) | EGR did not open/respond during test or if memory code, did not open intermittantly - EVR or PFE |
| 334 | (O,R,M) | EVP sensor is/was high - EVR |
| 335 | (O) | EGR feedback signal is/was out of range - EVR or PFE |
| 336 | (O,R,M) | PFE sensor signal is/was was high - >PFE |
| 337 | (O,R,M) | EGR feedback signal is/was was high - EVR |
| 338 | (M) | Cooling system did not heat up (check cooling system / thermostat operation) |
| 339 | (M) | Cooling system overheated (check cooling system / thermostat operation) |
| 341 | (O) | Octane jumper installed (information only code to notify you if it is installed) |
| 411 | (R) | Idle speed system not controlling idle properly (generally idle too high) - ISC |
| 412 | (R) | Idle speed system not controlling idle properly (generally idle too low) - ISC |
| 452 | (M) | Vehicle Speed Sensor (VSS) problem |
| 511 | (O) | No power to PCM pin 1 or bad PCM (processor) |
| 512 | (M) | Memory power (PCM pin 1) was interrupted - Was battery disconnected ? |
| 513 | (O) | Replace processor (PCM) (internal failure) |
| 519 | (O) | PSP switch/circuit open - PSP h Pedal Position (CPP) circuit fault - PNP |
| 528 | (M) | System shows voltage at pin 10 (is A/C on ?) or pin 30 (PNP, CPP switch) - PNP |
| 529 | (M) | Data Communications Link to processor failure Service any EEC codes, erase memory and retest If code is still present refer to instrument cluster diagnosis manual |
| 533 | (M) | Data Communications Link to instrument cluster failure - see 529 |
| 536 | (O,R,M) | Brake On Off open or shorted to ground - BOO |
| 538 | (R) | System did not receive goose test - TESTS |
| 539 | (O) | System shows voltage at PCM pin 10 Is A/C on ? |
| 542 | (O,M) | Fuel pump open, bad ground or always on - - Power / Fuel Pump Circuits |
| 543 | (O) | Fuel pump monitor circuit shows no power - Power / Fuel Pump Circuits |
|
| (M) | (Service 556 code first if present) Fuel pump relay or battery power feed was open - Power / Fuel Pump Circuits |
| 551 |
| Problem in Intake Manifold Runner Control (IMRC) solenoid/circuit - Solenoids |
| 552 | (O) | AIRB solenoid/circuit failure - Solenoids |
| 553 | (O) | AIRD solenoid/circuit failure - Solenoids |
| 554 | (O) | Fuel Press Regulator Control solenoid/circuit fault - Power / Fuel Pump Circuits |
| 556 | (O,M) | Fuel pump relay primary circuit fault - Power / Fuel Pump Circuits |
| 557 | (O,M) | Low speed pump relay primary circuit fault - Power / Fuel Pump Circuits |
| 558 | (O) | EGR vacuum regulator solenoid/circuit failure - EVR or PFE or Solenoids |
| 559 | (O) | A/C relay primary circuit fault - A/C and Fan Circuits |
| 563 | (O) | High Fan Control (HFC) circuit failure - A/C and Fan Circuits |
| 564 | (O) | Fan Control (FC) circuit failure - A/C and Fan Circuits |
| 565 | (O) | Canister Purge 1 solenoid/circuit failure - Solenoids |
| 566 | (O) | transmission 3/4 shift solenoid/circuit - Transmissions |
| 569 | (O) | Canister Purge 2 solenoid/circuit failure - Solenoids |
| 578 | (M) | A/C pressure sensor VREF short to ground - A/C and Fan Circuits |
| 579 | (M) | ACP sensor did not change with A/C on - A/C and Fan Circuits |
| 581 | (M) | Cooling fan current was excessive - A/C and Fan Circuits |
| 582 | (O) | Open cooling fan circuit - A/C and Fan Circuits |
| 583 | (M) | Fuel pump current was excessive - Power / Fuel Pump Circuits |
| 584 | (M) | Open power ground circuit - Power / Fuel Pump Circuits |
| 585 | (M) | A/C clutch current was excessive - A/C and Fan Circuits |
| 586 | (M) | Open circuit in A/C clutch - A/C and Fan Circuits |
| 587 | (O, M) | Communication problem between PCM and Variable Control Relay Module (VCRM) - Power / Fuel Pump Circuits |
| 617 | (M) | Transmission shift failure (1/2 shift) - Transmissions |
| 618 | (M) | Transmission shift failure (2/3 shift) - Transmissions |
| 619 | (M) | Transmission shift failure (3/4 shift) - Transmissions |
| 621 | (O) | Solenoid/circuit failure - shift solenoid 1 - Transmissions |
| 622 | (O) | Solenoid/circuit failure - shift solenoid 2 - Transmissions |
| 624 | (O,M) | Solenoid/circuit failure -Electronic Pressure Control (EPC) current is high - Transmissions |
| 625 | (O,M) | Solenoid/circuit failure - Electronic Pressure Control (EPC) current is low - Transmissions |
| 626 | (O) | Transmission Coast Clutch (CCS) Solenoid/circuit fault - Transmissions |
| 627 | (O) | Torque Converter Clutch circuit fault - Transmissions |
| 628 | (M) | Excessive converter clutch slippage - Transmissions |
| 629 | (O,M) | Torque Converter Clutch circuit fault - Transmissions |
| 631 | (O) | Overdrive Cancel Light circuit problem - Transmissions |
| 632 | (R) | E4OD - Transmission Control Switch (TCS) should be cycled once between engine ID and Goose test |
| 633 | (O) | 4x4L switch should be in 4x2 or 4x4 high for the test |
| 634 | (O,M) | Park/Neutral Position (PNP) or Clutch Pedal Position (CPP) circuit fault Electronic shift transmission - Manual Lever Position (MLP) sensor out of range in Park-Transmissions |
| 636 | (O,R) | Transmission Oil Temperature (TOT) sensor out of range - Transmissions |
| 637 | (O,M) | TOT sensor is/was high or open - Transmissions |
| 638 | (O,M) | TOT sensor is/was low or grounded - Transmissions |
| 639 | (R,M) | Transmission Speed sensor (TSS) circuit fault - Transmissions |
| 641 | (O) | Transmission solenoid/circuit failure Shift Solenoid 3 - Transmissions |
| 643 | (O,M) | Torque Converter Clutch (TCC) circuit - Transmissions |
| 645 | (M) | Transmission 1st gear failure - Transmissions |
| 646 | (M) | Transmission 2nd gear failure - Transmissions |
| 647 | (M) | Transmission 3rd gear failure - Transmissions |
| 648 | (M) | Transmission 4th gear failure - Transmissions |
| 649 | (M) | Transmission EPC system failure - Transmissions |
| 651 | (M) | Transmission EPC solenoid/circuit fault - Transmissions |
| 652 | (O) | Torque Converter Clutch (TCC) circuit fault - Transmissions |
| 654 | (O) | Transmission selector not in PARK - Transmissions |
| 656 | (M) | Torque Converter Clutch (TCC) slip - Transmissions |
| 657 | (M) | Transmission temperature was excessive - Transmissions |
