| Code |
Test Condition* |
Probable Cause |
| 111 |
O,C,R |
Pass |
| 112 |
O,R |
Intake Air Temperature sensor circuit indicates
circuit grounded/above 245 degrees F |
| 113 |
O,R |
Intake Air Temperature sensor circuit indicates
open circuit/below -40 degrees F |
| 114 |
O,R |
Intake Air Temperature sensor out of self-test range
|
| 116 |
O,R |
Coolant Temperature sensor out of self-test range
|
| 117 |
O,C |
Coolant Temperature circuit below minimum voltage/indicates
above 245 degrees F |
| 118 |
O,C |
Coolant Temperature sensor circuit above maximum
voltage/ indicates below -40 degrees |
| 121 |
O,C,R |
Throttle Position sensor out of self-test range
|
| 122 |
O,C |
Throttle Position sensor below minimum voltage |
| 123 |
O,C |
Throttle Position sensor above maximum voltage |
| 124 |
C |
Throttle Position Sensor voltage higher than expected
|
| 125 |
C |
Throttle Position Sensor voltage lower than expected
|
| 136 |
R |
Heated oxygen sensor indicates lean condition, left
side |
| 137 |
R |
Heated oxygen sensor indicates rich condition, left
side |
| 139 |
C |
No heated oxygen sensor switching detected, left
side |
| 141 |
C |
Fuel system indicates lean |
| 144 |
C |
No heated oxygen sensor switching detected, right
side |
| 157 |
R,C |
Mass Air Flow Sensor below minimum voltage |
| 158 |
O,R,C |
Mass Air Flow Sensor above maximum voltage |
| 159 |
O,R |
Mass Air Flow Sensor out of self-test range |
| 167 |
R |
Insufficient Throttle Position Sensor change during
Dynamic Response Check |
| 171 |
C |
Heated oxygen sensor unable to switch, right side
|
| 172 |
R,C |
Heated oxygen sensor indicates lean condition, right
side |
| 173 |
R,C |
Heated oxygen sensor indicates rich condition, right
side |
| 174 |
C |
Heated oxygen sensor switching slow, right side
|
| 175 |
C |
Heated oxygen sensor unable to switch, left side
|
| 176 |
C |
Heated oxygen sensor indicates lean condition, left
side |
| 177 |
C |
Heated oxygen sensor indicates rich condition, left
side |
| 178 |
C |
Heated oxygen sensor switching slow, left side |
| 179 |
C |
Adaptive Fuel lean limit reached at part throttle,
system rich, right side |
| 181 |
C |
Adaptive Fuel rich limit reached at part throttle,
right side |
| 184 |
C |
Mass Air Flow higher than expected |
| 185 |
C |
Mass Air Flow lower than expected |
| 186 |
C |
Injector Pulse-width higher than expected |
| 187 |
C |
Injector Pulse-width lower than expected |
| 188 |
C |
Adaptive Fuel lean limit reached, left side |
| 189 |
C |
Adaptive Fuel rich limit reached, left side |
| 191 |
C |
Adaptive Fuel lean limit reached at idle, left side
|
| 192 |
C |
Adaptive Fuel rich limit reached at idle, left side
|
| 193 |
O |
Flexible Fuel (FF) sensor circuit failure |
| 211 |
C |
Profile Ignition Pick-up circuit fault |
| 212 |
C |
Ignition module circuit failure/SPOUT circuit grounded
|
| 213 |
R |
SPOUT circuit open |
| 214 |
C |
Cylinder identification (CID) circuit failure |
| 215 |
C |
PCM detected coil 1 primary circuit failure |
| 216 |
C |
PCM detected coil 2 primary circuit failure |
| 217 |
C |
PCM detected coil 3 primary circuit failure |
| 218 |
C |
Loss of ignition diagnostic monitor (IDM) signal
- left side |
| 219 |
C |
Spark timing defaulted to 10 degrees SPOUT circuit
open |
| 221 |
C |
Spark timing error |
| 222 |
C |
Loss of ignition diagnostic monitor (IDM) signal
- right side |
| 223 |
C |
Loss of dual plug Inhibit (DPI) control |
| 224 |
C |
PCM detected coil 1,2,3 or 4 primary circuit failure
|
| 225 |
C |
Knock sensor not detected during dynamic response
test KOER |
| 226 |
O |
Ignition Diagnostic Module (IDM) signal not received
|
| 232 |
C |
PCM detected coil 1,2,3 or 4 primary circuit failure
|
| 238 |
C |
PCM detected coil 4 primary circuit failure |
| 241 |
C |
ICM to PCM - IDM pulse width transmission error
|
| 244 |
R |
CID circuit fault present when cylinder balance
test requested |
| 311 |
R |
AIR system inoperative during KOER (Bank number
1 with dual heated oxygen sensors) |
| 312 |
R |
AIR misdirected during KOER |
| 313 |
R |
AIR not bypassed during KOER |
| 314 |
R |
AIR system inoperative during KOER (Bank number
2 with dual heated oxygen sensors) |
| 326 |
C,R |
EGR (PFE/DPFE) circuit voltage lower than expected
|
| 327 |
O,C,R |
EGR (EGRP/EVP/PFE/DPFE) circuit below minimum voltage
|
| 328 |
O,C,R |
EGR valve position sensor voltage below closed limit
|
| 332 |
C,R |
Insufficient EGR valve opening detected |
| 334 |
O,C,R |
EGR valve position sensor voltage above closed limit
|
| 335 |
O |
EGR Sensor voltage out-of-range |
| 336 |
R |
EGR (PFE/DPFE) circuit higher than expected |
| 337 |
O,C,R |
EGR (EGRP/EVP/PFE/DPFE) circuit above maximum voltage
|
| 338 |
R |
ECT lower than expected |
| 339 |
R |
ECT higher than expected |
| 341 |
O |
Octane adjust service pin open |
| 381 |
C |
Frequent air conditioning clutch cycling |
| 411 |
R |
Unable to control RPM during Low RPM Self-test |
| 412 |
R |
Unable to control RPM during High RPM Self-test
|
| 415 |
R |
Idle Air Control (IAC) system at maximum adaptive
lower limit |
| 416 |
C |
Idle Air Control (IAC) system at upper adaptive
learning limit |
| 452 |
C |
No input from Vehicle Speed Sensor |
| 453 |
R |
Servo leaking down (KOER IVSC test) |
| 454 |
R |
Servo leaking up (KOER IVSC test) |
| 455 |
R |
Insufficient rpm increase (KOER IVSC test) |
| 456 |
R |
Insufficient rpm decrease (KOER IVSC test) |
| 457 |
O |
Speed control command switch(s) circuit not functioning
(KOEO IVSC test) |
| 458 |
O |
Speed control command switch(s) stuck/circuit grounded
(KOEO IVSC test) |
| 459 |
O |
Speed control ground circuit open (KOEO IVSC test)
|
| 511 |
O |
Read Only Memory test failed - replace PCM |
| 512 |
C |
Keep Alive Memory test failed |
| 513 |
O |
Internal voltage failure in PCM |
| 519 |
O |
Power steering pressure switch (PSP) circuit open
|
| 521 |
R |
Power steering pressure switch (PSP) circuit did
not change states |
| 522 |
O |
Transmission Range (TR) sensor circuit open/vehicle
in gear |
| 525 |
O |
Indicates vehicle in gear, air conditioning on |
| 527 |
O |
Transmission Range (TR) sensor circuit open, air
conditioning on during KOEO |
| 528 |
O |
Clutch pedal position (CPP) switch failure |
| 529 |
C |
Data Communication Link (DCL) or PCM circuit failure
|
| 532 |
C |
Cluster Control Assembly (CCA) circuit failure |
| 533 |
C |
Data Communications Link (DCL) or Electronic Instrument
Cluster (EIC) circuit failure |
| 536 |
C,R |
Brake ON/Off (BOO) circuit failure/not activated
during the KOER |
| 538 |
R |
Insufficient change in RPM/operator error in Dynamic
Response Check |
| 539 |
O |
Air conditioning on during Self-test |
| 542 |
O,C |
Fuel Pump circuit open; PCM to motor |
| 543 |
O,C |
Fuel Pump circuit open; Battery to PCM |
| 551 |
O |
Idle Air Control (IAC) circuit failure KOEO |
| 552 |
O |
Secondary Air Injection Bypass (AIRB) circuit failure
(KOEO) |
| 553 |
O |
Secondary Air Injection Diverter (AIRB) circuit
failure (KOEO) |
| 554 |
O |
Fuel Pressure Regulator Control (FPRC) circuit failure
|
| 556 |
O,C |
Primary Fuel Pump circuit failure |
| 557 |
O,C |
Low speed fuel pump primary circuit failure |
| 558 |
O |
EGR Vacuum Regulator circuit failure |
| 559 |
O |
Air Conditioning On (ACON) relay circuit failure
|
| 563 |
O, |
High fan control (HFC) circuit failure |
| 564 |
O |
Fan control (FC) circuit failure |
| 565 |
O |
Canister Purge circuit failure |
| 567 |
O |
Speed Control Vent (SCVNT) circuit failure (KOEO
IVSC test) |
| 568 |
O |
Speed Control Vacuum (SCVAC) circuit failure (KOEO
IVSC test) |
| 569 |
O |
Auxiliary Canister Purge (CANP2) circuit failure
KOEO |
| 571 |
O |
EGRA solenoid circuit failure KOEO |
| 572 |
O |
EGRV solenoid circuit failure KOEO |
| 578 |
C |
Air conditioning pressure sensor circuit shorted
|
| 579 |
C |
Insufficient air conditioning pressure change |
| 581 |
C |
Power to Fan circuit over current |
| 582 |
O |
Fan circuit open |
| 583 |
C |
Power to Fuel pump over current |
| 584 |
C |
VCRM Power ground circuit open (VCRM Pin 1) |
| 585 |
C |
Power to air conditioning clutch over current |
| 586 |
C |
Air conditioning clutch circuit open |
| 587 |
O,C |
Variable Control Relay Module (VCRM) communication
failure |
| 617 |
C |
1-2 shift error |
| 618 |
C |
2-3 shift error |
| 619 |
C |
3-4 shift error |
| 621 |
O,C |
Shift Solenoid 1 (SS 1) circuit failure KOEO |
| 622 |
O |
Shift Solenoid 2 (SS2) circuit failure KOEO |
| 623 |
O |
Transmission Control Indicator Light (TCIL) circuit
failure |
| 624 |
O,C |
Electronic Pressure Control (EPC) circuit failure
|
| 625 |
O,C |
Electronic Pressure Control (EPC) driver open in
PCM |
| 626 |
O |
Coast Clutch Solenoid (CCS) circuit failure KOEO
|
| 627 |
O |
Torque Converter Clutch (TCC) solenoid circuit failure
|
| 628 |
C |
Excessive converter clutch slippage |
| 629 |
O,C |
Torque Converter Clutch (TCC) solenoid circuit failure
|
| 631 |
O |
Transmission Control Indicator Lamp (TCIL) circuit
failure KOEO |
| 632 |
R |
Transmission Control Switch (TCS) circuit did not
change states during KOER |
| 634 |
O,C,R |
Transmission Range (TR) sensor voltage higher or
lower than expected |
| 636 |
O,R |
Transmission Fluid Temp (TFT) higher or lower than
expected |
| 637 |
O,C |
Transmission Fluid Temp (TFT) sensor circuit above
maximum voltage/ -40 degrees F indicated / circuit open |
| 638 |
O,C |
Transmission Fluid Temp (TFTj sensor circuit below
minimum voltage/290 degrees F indicated / circuit shorted |
| 639 |
R,C |
Insufficient input from Transmission Speed Sensor
(TSS) |
| 641 |
O,C |
Shift Solenoid 3 (SS3) circuit failure |
| 643 |
O,C |
Torque Converter Clutch (TCC) circuit failure |
| 645 |
C |
Incorrect gear ratio obtained for first gear |
| 646 |
C |
Incorrect gear ratio obtained for second gear |
| 647 |
C |
Incorrect gear ratio obtained for third gear |
| 648 |
C |
Incorrect gear ratio obtained for fourth gear |
| 649 |
C |
Electronic Pressure Control (EPC) higher or lower
than expected |
| 651 |
C |
Electronic Pressure Control (EPC)circuit failure
|
| 652 |
O |
Torque Converter Clutch (TCC) solenoid circuit failure
|
| 653 |
R |
Transmission Control Switch (TCS) did not change
states during KOER |
| 654 |
O |
Transmission Range (TR) sensor not indicating PARK
during KOEQ |
| 656 |
C |
Torque Converter Clutch continuous slip error |
| 657 |
C |
Transmission over temperature condition occurred
|
| 659 |
C |
High vehicle speed in park indicated |
| 667 |
C |
Transmission Range sensor circuit voltage below
minimum voltage |
| 668 |
C |
Transmission Range circuit voltage above maximum
voltage |
| 675 |
C |
Transmission Range sensor circuit voltage out of
range |
| 998 |
O |
Hard fault present |
| |
|
|
| |
O |
Key ON, Engine OFF |
| |
C |
Continuous Memory |
| |
R |
Engine Running |
