| Code |
Definitions |
| 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
intermittently - 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 |
| 521 |
(R) Wheel not turned during test or PSP problem - PSP |
| 522 |
(O) Park/Neutral Position (PNP) or Clutch Pedal Position
(CPP) circuit fault - PNP |
| |
transmission MLP sensor out of range in park - Transmissions |
| 524 |
Problem in low speed fuel pump circuit - Power / Fuel Pump Circuits |
| 525 |
(O,M) Park/Neutral Position (PNP) or Clutch 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 |
| 998 |
(R) Did not pass Key On Engine Off test yet (Get 111 in KOEO first) |
| |
(O) Transmission Electronic Pressure Control (EPC) solenoid/circuit fault - Transmissions |
| Code |
Definitions: |
| ACT |
Air Charge Temperature Sensor |
| BP |
See MAP |
| EEC |
Electronic Engine Control System |
| ECT |
Engine Coolant Temperature Sensor |
| EGR |
Exhaust Gas Recirculation Valve |
| EVP |
EGR Valve Position Sensor |
| HEGO |
Heated Exhaust Gas Oxygen Sensor |
| KOEO |
Key On Engine Off |
| KOER |
Key On Engine Running |
| MAF |
Mass Air Flow Sensor |
| MAP |
Manifold Absolute Pressure Sensor |
| MLP |
Manual Lever Position |
| PCM |
Powertrain Control Module |
| SPOUT |
Distributor Jumper to Allow Initial Timing |
| TP |
Throttle Position Sensor |
SM