OBD 1 Codes And Details
3-Digit EEC-IV Diagnostic Trouble Code (DTC) Definitions —Passenger Car
| DIAGNOSTIC TROUBLE CODES | DEFINITIONS |
|---|---|
| 111 | System Pass |
| 112 | Intake Air Temp (IAT) sensor circuit below minimum voltage/ 254°F indicated |
| 113 | Intake Air Temp (IAT) sensor circuit above maximum voltage/ -40°F indicated |
| 114 | Intake Air Temp (IAT) higher or lower than expected |
| 116 | Engine Coolant Temp (ECT) higher or lower than expected |
| 117 | Engine Coolant Temp (ECT) sensor circuit below minimum voltage/ 254°F indicated |
| 118 | Engine Coolant Temp (ECT) sensor circuit above maximum voltage/ -40°F indicated |
| 121 | Closed throttle voltage higher or lower than expected |
| 121 | Indicates throttle position voltage inconsistent with the MAF sensor |
| 122 | Throttle Position (TP) sensor circuit below minimum voltage |
| 123 | Throttle Position (TP) sensor circuit above maximum voltage |
| 124 | Throttle Position (TP) sensor voltage higher than expected |
| 125 | Throttle Position (TP) sensor voltage lower than expected |
| 126 | MAP/BARO sensor higher or lower than expected |
| 128 | MAP sensor vacuum hose damaged/disconnected |
| 129 | Insufficient MAP/Mass Air Flow (MAF) change during dynamic response test KOER |
| 136 | Lack of Heated Oxygen Sensor (HO2S-2) switch during KOER, indicates lean (Bank #2) |
| 137 | Lack of Heated Oxygen Sensor (HO2S-2) switch during KOER, indicates rich (Bank #2) |
| 139 | No Heated Oxygen Sensor (HO2S-2) switches detected (Bank #2) |
| 141 | Fuel system indicates lean |
| 144 | No Heated Oxygen Sensor (HO2S-1) switches detected (Bank #1) |
| 157 | Mass Air Flow (MAF) sensor circuit below minimum voltage |
| 158 | Mass Air Flow (MAF) sensor circuit above maximum voltage |
| 159 | Mass Air Flow (MAF) higher or lower than expected |
| 167 | Insufficient throttle position change during dynamic response test KOER |
| 171 | Fuel system at adaptive limits, Heated Oxygen Sensor (HO2S-1) unable to switch (Bank #1) |
| 172 | Lack of Heated Oxygen Sensor (HO2S-1) switches, indicates lean (Bank #1) |
| 173 | Lack of Heated Oxygen Sensor (HO2S-1) switches, indicates rich (Bank #1) |
| 175 | Fuel system at adaptive limits, Heated Oxygen Sensor (HO2S-2) unable to switch (Bank #2) |
| 176 | Lack of Heated Oxygen Sensor (HO2S-2) switches, indicates lean (Bank #2) |
| 177 | Lack of Heated Oxygen Sensor (HO2S-2) switches, indicates rich (Bank #2) |
| 179 | Fuel system at lean adaptive limit at part throttle, system rich (Bank #1) |
| 181 | Fuel system at rich adaptive limit at part throttle, system lean (Bank #1) |
| 184 | Mass Air Flow (MAF) higher than expected |
| 185 | Mass Air Flow (MAF) lower than expected |
| 186 | Injector pulsewidth higher than expected (with BARO sensor) |
| 186 | Injector pulsewidth higher or MAF lower than expected (without BARO sensor) |
| 187 | Injector pulsewidth lower than expected (with BARO sensor) |
| 187 | Injector pulsewidth lower or MAF higher than expected (without BARO sensor) |
| 188 | Fuel system at lean adaptive limit at part throttle, system rich (Bank #2) |
| 189 | Fuel system at rich adaptive limit at part throttle, system lean (Bank #2) |
| 193 | Flexible Fuel (FF) sensor circuit failure |
| 211 | Profile Ignition Pickup (PIP) circuit failure |
| 212 | Loss of Ignition Diagnostic Monitor (IDM) input to PCM/SPOUT circuit grounded |
| 213 | SPOUT circuit open |
| 214 | Cylinder Identification (CID) circuit failure |
| 215 | PCM detected coil 1 primary circuit failure (EI) |
| 216 | PCM detected coil 2 primary circuit failure (EI) |
| 217 | PCM detected coil 3 primary circuit failure (EI) |
| 218 | Loss of Ignition Diagnostic Monitor (IDM) signal-left side (dual plug EI) |
| 219 | Spark timing defaulted to 10 degrees-SPOUT circuit open (EI) |
| 221 | Spark timing error (EI) |
| 222 | Loss of Ignition Diagnostic Monitor (IDM) signal-right side (dual plug EI) |
| 223 | Loss of Dual Plug Inhibit (DPI) control (dual plug EI) |
| 224 | PCM detected coil 1, 2, 3 or 4 primary circuit failure (dual plug EI) |
| 225 | Knock not sensed during dynamic response test KOER |
| 226 | Ignition Diagnostic Module (IDM) signal not received (EI) |
| 232 | PCM detected coil 1, 2, 3 or 4 primary circuit failure (EI) |
| 238 | PCM detected coil 4 primary circuit failure (EI) |
| 241 | ICM to PCM IDM pulsewidth transmission error (EI) |
| 244 | CID circuit fault present when cylinder balance test requested |
| 311 | AIR system inoperative during KOER (Bank #1 w/dual HO2S) |
| 312 | AIR misdirected during KOER |
| 313 | AIR not bypassed during KOER |
| 314 | AIR system inoperative during KOER (Bank #2 w/dual HO2S) |
| 326 | EGR (PFE/DPFE) circuit voltage lower than expected |
| 327 | EGR (EGRP/EVP/PFE/DPFE) circuit below minimum voltage |
| 328 | EGR (EVP) closed valve voltage lower than expected |
| 332 | Insufficient EGR flow detected (EGRP/EVP/PFE/DPFE) |
| 334 | EGR (EVP) closed valve voltage higher than expected |
| 335 | EGR (PFE/DPFE) sensor voltage higher or lower than expected during KOEO |
| 336 | Exhaust pressure high/EGR (PFE/DPFE) circuit voltage higher than expected |
| 337 | EGR (EGRP/EVP/PFE/DPFE) circuit above maximum voltage |
| 338 | Engine Coolant Temperature (ECT) lower than expected (thermostat test) |
| 339 | Engine Coolant Temperature (ECT) higher than expected (thermostat test) |
| 341 | Octane adjust service pin open |
| 381 | Frequent A/C clutch cycling |
| 411 | Cannot control RPM during KOER low RPM check |
| 412 | Cannot control RPM during KOER high RPM check |
| 415 | Idle Air Control (IAC) system at maximum adaptive lower limit |
| 416 | Idle Air Control (IAC) system at upper adaptive learning limit |
| 452 | Insufficient input from Vehicle Speed Sensor (VSS) to PCM |
| 453 | Servo leaking down (KOER IVSC test) |
| 454 | Servo leaking up (KOER IVSC test) |
| 455 | Insufficient RPM increase (KOER IVSC test) |
| 456 | Insufficient RPM decrease (KOER IVSC test) |
| 457 | Speed control command switch(s) circuit not functioning (KOEO IVSC test) |
| 458 | Speed control command switch(s) stuck/circuit grounded (KOEO IVSC test) |
| 459 | Speed control ground circuit open (KOEO IVSC test) |
| 511 | PCM Read Only Memory (ROM) test failure KOEO |
| 512 | PCM Keep Alive Memory (KAM) test failure |
| 513 | PCM internal voltage failure (KOEO) |
| 519 | Power Steering Pressure (PSP) switch circuit open KOEO |
| 521 | Power Steering Pressure (PSP) switch circuit did not change states KOER |
| 522 | Vehicle not in PARK or NEUTRAL during KOEO/PNP switch circuit open |
| 524 | Low speed fuel pump circuit open—battery to PCM |
| 525 | Indicates vehicle in gear/A/C on |
| 527 | Park/Neutral Position (PNP) switch circuit open—A/C on KOEO |
| 528 | Clutch Pedal Position (CPP) switch circuit failure |
| 529 | Data Communication Link (DCL) or PCM circuit failure |
| 532 | Cluster Control Assembly (CCA) circuit failure |
| 533 | Data Communication Link (DCL) or Electronic Instrument Cluster (EIC) circuit failure |
| 536 | Brake On/Off (BOO) circuit failure/not actuated during KOER |
| 538 | Insufficient RPM change during KOER dynamic response test |
| 538 | Invalid cylinder balance test due to throttle movement during test (SFI only) |
| 538 | Invalid cylinder balance test due to CID circuit failure |
| 539 | A/C on/Defrost on during Self-Test |
| 542 | Fuel pump secondary circuit failure |
| 543 | Fuel pump secondary circuit failure |
| 551 | Idle Air Control (IAC) circuit failure KOEO |
| 552 | Secondary Air Injection Bypass (AIRB) circuit failure KOEO |
| 553 | Secondary Air Injection Diverter (AIRD) circuit failure KOEO |
| 554 | Fuel Pressure Regulator Control (FPRC) circuit failure |
| 556 | Fuel pump relay primary circuit failure |
| 557 | Low speed fuel pump primary circuit failure |
| 558 | EGR Vacuum Regulator (EVR) circuit failure KOEO |
| 559 | Air Conditioning On (ACON) relay circuit failure KOEO |
| 563 | High Fan Control (HFC) circuit failure KOEO |
| 564 | Fan Control (FC) circuit failure KOEO |
| 565 | Canister Purge (CANP) circuit failure KOEO |
| 566 | 3-4 shift solenoid circuit failure KOEO (A4LD) |
| 567 | Speed Control Vent (SCVNT) circuit failure (KOEO IVSC test) |
| 568 | Speed Control Vacuum (SCVAC) circuit failure (KOEO IVSC test) |
| 569 | Auxiliary Canister Purge (CANP2) circuit failure KOEO |
| 571 | EGRA solenoid circuit failure KOEO |
| 572 | EGRV solenoid circuit failure KOEO |
| 578 | A/C pressure sensor circuit shorted |
| 579 | Insufficient A/C pressure change |
| 581 | Power to Fan circuit over current |
| 582 | Fan circuit open |
| 583 | Power to Fuel pump over current |
| 584 | VCRM Power ground circuit open (VCRM Pin 1) |
| 585 | Power to A/C clutch over current |
| 586 | A/C clutch circuit open |
| 587 | Variable Control Relay Module (VCRM) communication failure |
| 617 | 1-2 shift error |
| 618 | 2-3 shift error |
| 619 | 3-4 shift error |
| 621 | Shift Solenoid 1 (SS1) circuit failure KOEO |
| 622 | Shift Solenoid 2 (SS2) circuit failure KOEO |
| 623 | Transmission Control Indicator Light (TCIL) circuit failure |
| 624 | Electronic Pressure Control (EPC) circuit failure |
| 625 | Electronic Pressure Control (EPC) driver open in PCM |
| 626 | Coast Clutch Solenoid (CCS) circuit failure KOEO |
| 627 | Torque Converter Clutch (TCC) solenoid circuit failure |
| 628 | Excessive converter clutch slippage |
| 629 | Torque Converter Clutch (TCC) solenoid circuit failure |
| 631 | Transmission Control Indicator Lamp (TCIL) circuit failure KOEO |
| 632 | Transmission Control Switch (TCS) circuit did not change states during KOER |
| 633 | 4x4L switch closed during KOEO |
| 634 | Transmission Range (TR) voltage higher or lower than expected |
| 636 | Transmission Fluid Temp (TFT) higher or lower than expected |
| 637 | Transmission Fluid Temp (TFT) sensor circuit above maximum voltage/ -40°F (-40°C) indicated/circuit open |
| 638 | Transmission Fluid Temp (TFT) sensor circuit below minimum voltage/ 290°F (143°C) indicated/circuit shorted |
| 639 | Insufficient input from Transmission Speed Sensor (TSS) |
| 641 | Shift Solenoid 3 (SS3) circuit failure |
| 643 | Torque Converter Clutch (TCC) circuit failure |
| 645 | Incorrect gear ratio obtained for first gear |
| 646 | Incorrect gear ratio obtained for second gear |
| 647 | Incorrect gear ratio obtained for third gear |
| 648 | Incorrect gear ratio obtained for fourth gear |
| 649 | Electronic Pressure Control (EPC) higher or lower than expected |
| 651 | Electronic Pressure Control (EPC) circuit failure |
| 652 | Torque Converter Clutch (TCC) solenoid circuit failure |
| 653 | Transmission Control Switch (TCS) did not change states during KOER |
| 654 | Transmission Range (TR) sensor not indicating PARK during KOEO |
| 656 | Torque Converter Clutch continuous slip error |
| 657 | Transmission over temperature condition occurred |
| 659 | High vehicle speed in park indicated |
| 667 | Transmission Range sensor circuit voltage below minimum voltage |
| 668 | Transmission Range circuit voltage above maximum voltage |
| 675 | Transmission Range sensor circuit voltage out of range |
| 998 | Hard fault present ****FMEM MODE**** |
This will help.
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