Diagnostic Trouble Code (DTC) Definition Chart
DIAGNOSTIC TROUBLE CODE (DTC) DEFINITION
| Service Code & Test Condition(s) | Service Code Definition |
|---|---|
| 111 - KOEO, KOER Continuous Memory | System Pass |
| 112 - KOEO, Continuous Memory | ACT indicated 123°C (254°F)/circuit grounded |
| 113 - KOEO, Continuous Memory | ACT indicated -40°C (-40°F)/circuit open |
| 114 - KOEO, KOER | Air Charge Temp (ACT) out of Self-Test Range |
| 116 - KOEO, KOER | Engine Coolant Temp (ECT) out of Self-Test Range |
| 117 - KOEO, Continuous Memory | ECT indicated 123°C (254°F)/circuit grounded |
| 118 - KOEO, Continuous Memory | ECT indicated -40°C (-40°F)/circuit open |
| 121 - KOEO, KOER, Continuous Memory | Throttle Position (TP) out of Self-Test Range |
| 122 - KOEO, Continuous Memory | Throttle Position (TP) below minimum voltage |
| 123 - KOEO, Continuous Memory | Throttle Position (TP) above maximum voltage |
| 124 - Continuous Memory | Throttle Position (TP) Sensor voltage higher than expected |
| 125 - Continuous Memory | Throttle Position (TP) Sensor voltage lower than expected |
| 129 - KOER | Insufficient MAP change during Dynamic Response Test |
| 157 - Continuous Memory | MAF circuit below minimum voltage |
| 158 - KOEO, Continuous Memory | MAF circuit above maximum voltage |
| 159 - KOEO, KOER | Mass Air Flow (MAF) out of Self-Test range |
| 167 - KOER | Insufficient TP change during Dynamic Response Test |
| 171 - Continuous Memory | Fuel system at adaptive limits, Oxygen Sensor (HEGO) unable to switch |
| 172 - KOER, Continuous Memory | Lack of Oxygen Sensor (HEGO) switches, indicates lean |
| 173 - KOER, Continuous Memory | Lack of Oxygen Sensor (HEGO) switches, indicates rich |
| 179 - Continuous Memory | Fuel system at lean adaptive limit at part throttle, system rich |
| 181 - Continuous Memory | Fuel system at rich adaptive limit at part throttle, system lean |
| 184 - Continuous Memory | Mass Air Flow (MAF) higher than expected |
| 185 - Continuous Memory | Mass Air Flow (MAF) lower than expected |
| 186 - Continuous Memory | Injector pulse width higher than expected |
| 187 - Continuous Memory | Injector pulse width lower than expected |
| 211 - Continuous Memory | PIP circuit failure |
| 213 - KOER | SPOUT circuit open |
| 218 - Continuous Memory | Loss of IDM (left side) |
| 222 - Continuous Memory | Loss of IDM (right side) |
| 223 - Continuous Memory | Loss of Dual Plug Input Control |
| 224 - Continuous Memory | Erratic IDM input to processor |
| 327 - KOEO, KOER, Continuous Memory | EVP circuit below minimum voltage |
| 328 - KOEO, KOER, Continuous Memory | EVP voltage below closed limit |
| 332 - KOER, Continuous Memory | EGR valve opening not detected |
| 334 - KOEO, KOER, Continuous Memory | EVP voltage above closed limit |
| 337 - KOEO, KOER, Continuous Memory | EVP circuit above maximum voltage |
| 341 | Octane adjust circuit open |
| 411 - KOER | Cannot control rpm during Self-Test low rpm check |
| 412 - KOER | Cannot control rpm during Self-Test high rpm check |
| 452 - Continuous Memory | Insufficient input from Vehicle Speed Sensor (VSS) |
| 511 - KOEO | EEC processor Read Only Memory (ROM) test failed |
| 512 - Continuous Memory | EEC processor Keep Alive Memory (KAM) test failed |
| 513 - KOEO | Failure in EEC processor internal voltage |
| 519 - KOEO | Power Steering Pressure Switch (PSPS) circuit open |
| 521 - KOER | PSPS circuit did not change states |
| 522 - KOEO | Vehicle not in PARK or NEUTRAL during KOEO |
| 536 - KOER | Brake On/Off (BOO) circuit failure/not actuated during Self-Test |
| 538 - KOER | Operator error (Dynamic Response/Cylinder Balance Tests) |
| 539 - KOEO | A/C ON/Defrost ON during Self-Tests |
| 542 - KOEO, Continuous Memory | Fuel Pump circuit open - EEC processor to motor ground |
| 543 - KOEO, Continuous Memory | Fuel Pump circuit open - battery to EEC processor |
| 556 - KOEO, Continuous Memory | Primary Fuel Pump circuit failure |
| 558 - KOEO | EGR Vacuum Regulator (EVR) circuit failure |
| 566 - KOEO | Shift Solenoid (SS) circuit failure |
| 629 - KOEO | Clutch Converter Override (CCO) circuit failure |
| 998 - KOER | Hard fault present |
| NO CODES | Unable to initiate Self-Test or unable to output Self-Test Codes |
| CODES NOT LISTED | Service codes displayed are not applicable to the vehicle being tested |