OBD DIAGNOSTIC MONITORS
The Engine Management and Transmission Control systems are continuously checked during vehicle operation by the Engine Control Module (ECM) and Transmission Control Module (TCM) on-board diagnostic (OBD) facilities. Powertrain OBD incorporates six diagnostic monitors. Each monitor has an associated group of DTCs. The diagnostic monitors will complete the diagnostic test(s) if a specified service "drive cycle" is carried out.
The six diagnostic monitors are as follows
- Heated Oxygen Sensors Monitor
- Adaptive Fuel Monitor
- Misfire Monitor
- Catalyst Efficiency Monitor
- Evaporative System Monitor
- Comprehensive Component Monitor (Engine Management/Transmission)
DIAGNOSTIC MONITORS DRIVE CYCLES
Technicians can ensure that an OBD Monitor drive cycle is completed and that all or specific components have been checked by completing a specified drive cycle. Use the following service drive cycles to confirm that the components and subsystems covered by the Diagnostic Monitors are operating correctly.
DIAGNOSTIC TROUBLE CODE INDEX
| DTC | Description |
|---|---|
| DTC P0010 | VVT circuit malfunction - bank 1 |
| DTC P0020 | VVT circuit malfunction - bank 2 |
| DTC P0031 | HO2 Sensor heater control circuit low current - bank 1, upstream (1/1) |
| DTC P0032 | HO2 Sensor heater control circuit high current - bank 1, upstream (1/1) |
| DTC P0037 | HO2 Sensor heater control circuit low resistance - bank 1, downstream (1/2) |
| DTC P0038 | HO2 Sensor heater control circuit high resistance - bank 1, downstream (1/2) |
| DTC P0051 | HO2 Sensor heater control circuit low current - bank 2, upstream (2/1) |
| DTC P0052 | HO2 Sensor heater control circuit high current - bank 2, upstream (2/1) |
| DTC P0057 | HO2 Sensor heater control circuit low resistance - bank 2, downstream (2/2) |
| DTC P0058 | HO2 Sensor heater control circuit high resistance - bank 2, downstream (2/2) |
| DTC P0101 | MAF Sensor circuit range/performance |
| DTC P0102 | MAF Sensor circuit low voltage |
| DTC P0103 | MAF Sensor circuit high voltage |
| DTC P0105 | MAP Sensor circuit malfunction |
| DTC P0106 | BARO Sensor circuit range/performance |
| DTC P0107 | BARO Sensor circuit low voltage |
| DTC P0108 | BARO Sensor circuit high voltage |
| DTC P0111 | IAT Sensor circuit range/performance |
| DTC P0112 | IAT Sensor circuit high voltage (low air temperature) |
| DTC P0113 | IAT Sensor circuit low voltage (high air temperature) |
| DTC P0116 | ECT Sensor circuit range/performance |
| DTC P0117 | ECT Sensor circuit high voltage (low coolant temperature) |
| DTC P0118 | ECT Sensor circuit low voltage (high coolant temperature) |
| DTC P0121 | TP Sensor range/performance (TP1 compared to TP2) |
| DTC P0122 | TP Sensor circuit 1 low voltage |
| DTC P0123 | TP Sensor circuit 1 high voltage |
| DTC P0125 | ECT Sensor response (for closed loop fuel control); (Coolant thermostat monitor) |
| DTC P0128 | Coolant thermostat range/performance |
| DTC P0131 | HO2 Sensor sense circuit low current - bank 1, upstream (1/1); (Universal oxygen sensor: lean condition at ECM - high current at sensor) |
| DTC P0132 | HO2 Sensor sense circuit high current - bank 1, upstream (1/1); (Universal oxygen sensor: rich condition at ECM - low current at sensor) |
| DTC P0133 | HO2 Sensor sense circuit slow response - bank 1, upstream (1/1) |
| DTC P0137 | HO2 Sensor sense circuit low voltage - bank 1, downstream (1/2) |
| DTC P0138 | HO2 Sensor sense circuit high voltage - bank 1, downstream (1/2) |
| DTC P0140 | HO2 Sensor sense circuit no activity - bank 1, downstream (1/2) |
| DTC P0151 | HO2 Sensor sense circuit low current - bank 2, upstream (2/1); (Universal oxygen sensor: lean condition at ECM - high current at sensor) |
| DTC P0152 | HO2 Sensor sense circuit high current - bank 2, upstream (2/1); (Universal oxygen sensor: rich condition at ECM - low current at sensor) |
| DTC P0153 | HO2 Sensor sense circuit slow response - bank 2, upstream (2/1) |
| DTC P0157 | HO2 Sensor sense circuit low voltage - bank 2, downstream (2/2) |
| DTC P0158 | HO2 Sensor sense circuit high voltage - bank 2, downstream (2/2) |
| DTC P0160 | HO2 Sensor sense circuit no activity - bank 2, downstream (2/2) |
| DTC P0171 | Bank 1 combustion too lean |
| DTC P0172 | Bank 1 combustion too rich |
| DTC P0174 | Bank 2 combustion too lean |
| DTC P0175 | Bank 2 combustion too rich |
| DTC P0181 | EFT Sensor range/performance |
| DTC P0182 | EFT Sensor circuit low voltage (high temperature) |
| DTC P0183 | EFT Sensor circuit high voltage (low temperature) |
| DTC P0191 | IP Sensor circuit range/performance |
| DTC P0192 | IP Sensor sensor circuit low voltage (low pressure) |
| DTC P0193 | IP Sensor sensor circuit high voltage (high pressure) |
| DTC P0196 | EOT Sensor range/performance |
| DTC P0197 | EOT Sensor low voltage (high temperature) |
| DTC P0198 | EOT Sensor high voltage (low temperature) |
| DTC P0201 | Fuel injector 1 circuit malfunction |
| DTC P0202 | Fuel injector 2 circuit malfunction |
| DTC P0203 | Fuel injector 3 circuit malfunction |
| DTC P0204 | Fuel injector 4 circuit malfunction |
| DTC P0205 | Fuel injector 5 circuit malfunction |
| DTC P0206 | Fuel injector 6 circuit malfunction |
| DTC P0222 | TP Sensor sense circuit 2 (TP2) low voltage |
| DTC P0223 | TP Sensor sense circuit 2 (TP2) high voltage |
| DTC P0300 | Random misfire detected; *Refer to Misfire Note, page 5 |
| DTC P0301 | Misfire detected - cylinder 1; *Refer to Misfire Note, page 5 |
| DTC P0302 | Misfire detected - cylinder 2; *Refer to Misfire Note, page 5 |
| DTC P0303 | Misfire detected - cylinder 3; *Refer to Misfire Note, page 5 |
| DTC P0304 | Misfire detected - cylinder 4; *Refer to Misfire Note, page 5 |
| DTC P0305 | Misfire detected - cylinder 5; *Refer to Misfire Note, page 5 |
| DTC P0306 | Misfire detected - cylinder 6; *Refer to Misfire Note, page 5 |
| DTC P0332 | KS sense circuit out of range - low voltage |
| DTC P0333 | KS sense circuit out of range - high voltage |
| DTC P0335 | CKP Sensor circuit malfunction |
| DTC P0336 | CKP Sensor circuit range/performance |
| DTC P0340 | CMP Sensor 1 circuit malfunction - bank 1 |
| DTC P0341 | CMP Sensor 1 circuit range/performance - bank 1 |
| DTC P0351 | Ignition module primary circuit malfunction - cylinder 1 |
| DTC P0352 | Ignition module primary circuit malfunction - cylinder 2 |
| DTC P0353 | Ignition module primary circuit malfunction - cylinder 3 |
| DTC P0354 | Ignition module primary circuit malfunction - cylinder 4 |
| DTC P0355 | Ignition module primary circuit malfunction - cylinder 5 |
| DTC P0356 | Ignition module primary circuit malfunction - cylinder 6 |
| DTC P0420 | Catalytic converter system efficiency below threshold - bank 1 |
| DTC P0430 | Catalytic converter system efficiency below threshold - bank 2 |
| DTC P0442 | EVAP system leak detected - small (0.040 in.) |
| DTC P0443 | EVAP canister purge valve circuit malfunction |
| DTC P0444 | EVAP canister purge valve circuit open circuit |
| DTC P0445 | EVAP canister purge valve circuit short circuit |
| DTC P0446 | EVAP canister close valve circuit malfunction |
| DTC P0447 | EVAP canister close valve circuit open circuit |
| DTC P0448 | EVAP canister close valve circuit short circuit |
| DTC P0450 | FTP Sensor circuit malfunction |
| DTC P0452 | FTP Sensor circuit low voltage (low pressure) |
| DTC P0453 | FTP Sensor circuit high voltage (high pressure) |
| DTC P0455 | EVAP system leak detected - large |
| DTC P0456 | EVAP system leak detected - very small (0.020 in.) |
| DTC P0460 | Fuel level sensor(s) circuit range/performance |
| DTC P0480 | Radiator cooling fan module drive circuit malfunction |
| DTC P0506 | Idle RPM lower than expected |
| DTC P0507 | Idle RPM higher than expected |
| DTC P0560 | Battery power supply voltage malfunction; Note: This DTC can be flagged due to fuel injection pressure sensor fault. If P0193 is also flagged, correct first |
| DTC P0565 | Cruise control ON/OFF switch fault |
| DTC P0566 | Cruise control CANCEL switch ON fault |
| DTC P0567 | Cruise control RESUME switch ON fault |
| DTC P0568 | Cruise control input signal low/high resistance |
| DTC P0569 | Cruise control SET/- switch ON fault |
| DTC P0570 | Cruise control SET/+ switch ON fault |
| DTC P0603 | ECM Keep alive memory error |
| DTC P0616 | Starter relay drive circuit low voltage/starter relay request off (ignition switch position III OFF) |
| DTC P0617 | Starter relay drive circuit high voltage/starter relay request on (ignition switch position III ON) |
| DTC P0646 | A/C Compressor clutch relay drive circuit low voltage/A/C (compressor clutch request off [CAN]) |
| DTC P0647 | A/C Compressor clutch relay drive circuit high voltage/A/C (compressor clutch request on [CAN]) |
| DTC P0706 | Transmission range sensor circuit - no signal; incorrect signal(s) |
| DTC P0710 | TFT Sensor circuit malfunction |
| DTC P0715 | Turbine speed sensor circuit malfunction |
| DTC P0720 | Output speed sensor circuit malfunction; (Automatic Transmission) |
| DTC P0731 | 1st Gear ratio error; Note: If a shift solenoid failure DTC is also flagged, correct shift solenoid DTC first |
| DTC P0732 | 2nd Gear ratio error; Note: If a shift solenoid failure DTC is also flagged, correct shift solenoid DTC first |
| DTC P0733 | 3rd Gear ratio error; Note: If a shift solenoid failure DTC is also flagged, correct shift solenoid DTC first |
| DTC P0734 | 4th Gear ratio error; Note: If a shift solenoid failure DTC is also flagged, correct shift solenoid DTC first |
| DTC P0735 | 5th Gear ratio error; Note: If a shift solenoid failure DTC is also flagged, correct shift solenoid DTC first |
| DTC P0736 | Reverse gear ratio error |
| DTC P0740 | TCC malfunction |
| DTC P0743 | TCC Solenoid circuit malfunction |
| DTC P0748 | Line pressure control solenoid circuit malfunction |
| DTC P0753 | Shift solenoid A circuit malfunction |
| DTC P0758 | Shift solenoid B circuit malfunction |
| DTC P0763 | Shift solenoid C circuit malfunction |
| DTC P0778 | 2/4 Brake pressure control solenoid circuit malfunction |
| DTC P0791 | Intermediate speed sensor circuit malfunction; (Automatic transmission) |
| DTC P0791 | Output speed sensor circuit malfunction; (Manual transmission) |
| DTC P0831 | OBD II Clutch cancel switch low voltage (switch normally closed); * Manual transmission input to |
| DTC P0832 | OBD II Clutch cancel switch high voltage (switch normally closed); * Manual transmission input to |
| DTC P0834 | Clutch pedal safety switch low voltage (switch normally open); * Manual transmission input to ECM |
| DTC P0835 | Clutch pedal safety switch high voltage (switch normally open); * Manual transmission input to ECM |
| DTC P0860 | J Gate CAN network malfunction; * J Gate/CAN monitored by ECM |
| DTC P1000 | System (OBD) check not complete since last memory clear |
| DTC P1104 | MAF Sensor ground malfunction |
| DTC P1107 | MAP Sensor sense circuit low voltage |
| DTC P1108 | MAP Sensor sense circuit high voltage |
| DTC P1111 | System (OBD) checks complete since last memory clear |
| DTC P1122 | APP Sensor sense circuit low voltage - APP1 |
| DTC P1123 | APP Sensor sense circuit high voltage - APP1; Note: This DTC could be flagged by both sensor element sensing circuit having faults |
| DTC P1146 | Generator "CHARGE" circuit low voltage/request high |
| DTC P1215 | APP Sensor sense circuit low voltage - APP2 |
| DTC P1216 | APP Sensor sense circuit high voltage - APP2; Note: This DTC could be flagged by both sensor element sensing circuit having faults |
| DTC P1224 | Throttle control position error |
| DTC P1229 | Throttle motor control circuit malfunction |
| DTC P1234 | No fuel pump commands received by ECM |
| DTC P1236 | Fuel pump not activated when requested by ECM |
| DTC P1240 | Sensor power supply circuit malfunction |
| DTC P1241 | Sensor power supply circuit low voltage; (APP Sensor, TP Sensor, IP Sensor, MAP Sensor, FTP Sensor) |
| DTC P1242 | Sensor power supply circuit high voltage; (APP Sensor, TP Sensor, IP Sensor, MAP Sensor, FTP Sensor) |
| DTC P1243 | Sensor ground circuits open circuit; (APP Sensor, TP Sensor, IP Sensor, MAP Sensor, FTP Sensor) |
| DTC P1244 | Generator "CHARGE" circuit high voltage/request low |
| DTC P1245 | Engine crank signal low voltage |
| DTC P1246 | Engine crank signal high voltage |
| DTC P1250 | Throttle valve return spring malfunction |
| DTC P1251 | Throttle motor relay OFF failure |
| DTC P1254 | Throttle "limp home" spring malfunction |
| DTC P1260 | Security input malfunction |
| DTC P1313 | Misfire rate catalyst damage - bank 1; NOTE: This DTC will flag only when accompanied by an individual cylinder misfire DTC: P0300 - P0306 |
| DTC P1314 | Misfire rate catalyst damage - bank 2; NOTE: This DTC will flag only when accompanied by an individual cylinder misfire DTC: P0300 - P0306 |
| DTC P1316 | Misfire excess emission; NOTE: This DTC will flag only when accompanied by an individual cylinder misfire DTC: P0300 - P0306 |
| DTC P1338 | Fuel pump feedback circuit low/high voltage |
| DTC P1340 | CMP Sensor 2 circuit malfunction - bank 2 |
| DTC P1341 | CMP Sensor 2 circuit range/performance - bank 2 |
| DTC P1344 | APP Sensor sense circuits APP1 and APP2 range/performance |
| DTC P1367 | Ignition amplifier bank 1 (1, 3, 5) fault |
| DTC P1368 | Ignition amplifier bank 2 (2, 4, 6) fault |
| DTC P1384 | VVT solenoid malfunction - bank 1 |
| DTC P1396 | VVT solenoid malfunction - bank 2 |
| DTC P1516 | Gear change P/N driving malfunction |
| DTC P1517 | Gear change P/N starting malfunction |
| DTC P1532 | IMT valve 2 (bottom) circuit malfunction |
| DTC P1549 | IMT valve 1 (top) circuit malfunction |
| DTC P1571 | Brake ON/OFF switch; brake cancel switch malfunction; (Brake ON/OFF switch - normally open; brake cancel switch - normally closed) |
| DTC P1573 | CAN throttle angle error |
| DTC P1582 | "Flight recorder" data is stored if any one of five conditions occur |
| DTC P1601 | Incorrect ECM or TCM fitted to vehicle |
| DTC P1603 | TCM EEPROM failure |
| DTC P1606 | EMS control relay malfunction; Note: This DTC could be flagged along with P0032 and P0052, which if flagged, should be corrected first |
| DTC P1609 | ECM microprocessor to microprocessor communication failure |
| DTC P1611 | ECM sub CPU failure |
| DTC P1629 | Generator "FIELD" circuit failure |
| DTC P1631 | Throttle motor relay coil drive circuit OFF failure |
| DTC P1632 | Generator charge system failure/generator "LOAD" feedback circuit failure |
| DTC P1633 | ECM main CPU failure |
| DTC P1634 | Throttle "watch dog" circuit malfunction |
| DTC P1637 | CAN ECM to ABS/TCCM (DSCCM) network malfunction |
| DTC P1638 | CAN ECM/INST network malfunction |
| DTC P1642 | CAN circuit malfunction |
| DTC P1643 | CAN ECM/TCM network malfunction |
| DTC P1646 | ECM HO2 Sensor control malfunction - bank 1 upstream (1/1) |
| DTC P1647 | ECM HO2 Sensor control malfunction - bank 2 upstream (2/1) |
| DTC P1648 | ECM KS self test failure |
| DTC P1656 | TP Sensor amplifier circuit malfunction |
| DTC P1657 | Throttle motor relay coil drive circuit ON failure |
| DTC P1658 | Throttle motor relay ON failure |
| DTC P1699 | CAN ECM/A/CCM network malfunction |
| DTC P1710 | Control valve solenoids ground circuit malfunction |
| DTC P1745 | Low clutch timing solenoid circuit malfunction |
| DTC P1746 | Reduction timing solenoid circuit malfunction |
| DTC P1747 | 2/4 Brake timing solenoid circuit malfunction |
| DTC P1777 | CAN torque reduction error |
| DTC P1780 | D - 4 Switch circuit malfunction |
| DTC P1793 | TCM Ignition switched power supply circuit malfunction |
| DTC P1796 | CAN network malfunction |
| DTC P1797 | CAN TCM/ECM network malfunction |
| DTC P1799 | CAN TCM/ABS/TC (DSCCM) network malfunction |
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