Diagnostic Trouble Code Definitions

DIAGNOSTIC TROUBLE DEFINITIONS

Generic Scan Tool Code ⁽¹⁾

DRBIII® Scan Tool Message ⁽¹⁾

1/1 O2 SENSOR HEATER CIRCUIT LOW

1/1 O2 SENSOR HEATER CIRCUIT HIGH

1/2 O2 SENSOR HEATER CIRCUIT LOW

1/2 O2 SENSOR HEATER CIRCUIT HIGH

2/1 O2 SENSOR HEATER CIRCUIT LOW

2/1 O2 SENSOR HEATER CIRCUIT HIGH

BATTERY TEMP SENSOR PERFORMANCE

MAP SENSOR VOLTAGE TOO LOW

MAP SENSOR VOLTAGE TOO HIGH

INTAKE AIR TEMP PERFORMANCE

INTAKE AIR TEMP SENSOR VOLTAGE LOW

INTAKE AIR TEMP SENSOR VOLTAGE HIGH

ECT SENSOR VOLTAGE TOO LOW

ECT SENSOR VOLTAGE TOO HIGH

TPS VOLTAGE DOES NOT AGREE WITH MAP

THROTTLE POSITION SENSOR VOLTAGE LOW

THROTTLE POSITION SENSOR VOLTAGE HIGH

CLOSED LOOP TEMP NOT REACHED

1/1 O2 SENSOR SHORTED TO GROUND

1/1 O2 SENSOR SHORTED TO VOLTAGE

1/1 O2 SENSOR SLOW RESPONSE

1/1 O2 SENSOR HEATER FAILURE

1/2 O2 SENSOR HEATER CIRCUIT MALFUNCTION

1/2 O2 SENSOR SHORTED TO GROUND

1/2 O2 SENSOR SHORTED TO VOLTAGE

1/2 O2 SENSOR SLOW RESPONSE

1/2 O2 SENSOR HEATER FAILURE

1/3 O2 SENSOR SHORTED TO GROUND

1/3 O2 SENSOR SHORTED TO VOLTAGE

1/3 O2 SENSOR SLOW RESPONSE

1/3 O2 SENSOR HEATER FAILURE

2/1 O2 SENSOR SHORTED TO GROUND

2/1 O2 SENSOR SHORTED TO VOLTAGE

2/1 O2 SENSOR SLOW RESPONSE

2/1 O2 SENSOR HEATER FAILURE

2/2 O2 SENSOR SHORTED TO GROUND

2/2 O2 SENSOR SHORTED TO VOLTAGE

2/2 O2 SENSOR SLOW RESPONSE

2/2 O2 SENSOR HEATER FAILURE

1/1 FUEL SYSTEM LEAN

1/1 FUEL SYSTEM RICH

2/1 FUEL SYSTEM LEAN

2/1 FUEL SYSTEM RICH

CNG TEMP SENSOR LOW

CNG TEMP SENSOR HIGH

INJECTOR # 1 CONTROL CIRCUIT

INJECTOR # 2 CONTROL CIRCUIT

INJECTOR # 3 CONTROL CIRCUIT

INJECTOR # 4 CONTROL CIRCUIT

INJECTOR # 5 CONTROL CIRCUIT

INJECTOR # 6 CONTROL CIRCUIT

INJECTOR # 7 CONTROL CIRCUIT

INJECTOR # 8 CONTROL CIRCUIT

MULTIPLE CYLINDER MISFIRE

CYLINDER # 1 MISFIRE

CYLINDER # 2 MISFIRE

CYLINDER # 3 MISFIRE

CYLINDER # 4 MISFIRE

CYLINDER # 5 MISFIRE

CYLINDER # 6 MISFIRE

CYLINDER # 7 MISFIRE

CYLINDER # 8 MISFIRE

NO CRANK REFERENCE SIGNAL AT PCM

NO CAM SIGNAL AT PCM

IGNITION COIL #1 PRIMARY CIRCUIT

IGNITION COIL #2 PRIMARY CIRCUIT

IGNITION COIL #3 PRIMARY CIRCUIT

IGNITION COIL #4 PRIMARY CIRCUIT

IGNITION COIL #5 PRIMARY CIRCUIT

1/1 CATALYTIC CONVERTER EFFICIENCY

2/1 CATALYTIC CONVERTER EFFICIENCY

EVAP PURGE FLOW MONITOR

EVAP LEAK MONITOR MEDIUM (.040") LEAK DETECTED

EVAP PURGE SOLENOID CIRCUIT

EVAP LEAK MONITOR LARGE LEAK DETECTED

EVAP LEAK MONITOR SMALL (.020") LEAK DETECTED

FUEL LEVEL UNIT NO CHANGE OVER MILES

FUEL LEVEL UNIT NO CHANGE OVER TIME

FUEL LEVEL SENDING UNIT VOLTS TOO LOW

FUEL LEVEL SENDING UNIT VOLTS TOO HIGH

NO VEHICLE SPEED SENSOR SIGNAL

IDLE AIR CONTROL MOTOR CIRCUITS

PCM INTERNAL CONTROLLER FAILURE

P0622 ⁽²⁾

GENERATOR FIELD NOT SWITCHING PROPERLY

P0645 ⁽³⁾

A/C CLUTCH RELAY CIRCUIT

P0711 ⁽⁴⁾

TRANS TEMP SENSOR, NO TEMP RISE AFTER START

P0712 ⁽⁴⁾

TRANS TEMP SENSOR VOLTAGE TOO LOW

P0713 ⁽⁴⁾

TRANS TEMP SENSOR VOLTAGE TOO HIGH

P0720 ⁽⁴⁾

LOW OUTPUT SPEED SENSOR - RPM ABOVE 15 MPH

P0740 ⁽⁴⁾

TORQ CONV CLU, NO RPM DROP AT LOCKUP

P0743 ⁽⁴⁾

TORQUE CONVERTER CLUTCH SOLENOID/TRANS RELAY CIRCUITS

P0748 ⁽⁴⁾

PRESSURE SOL CONTROL/TRANS RELAY CIRCUITS

P0751 ⁽⁴⁾

O/D SWITCH PRESSED (LO) MORE THAN 5 MINUTES

P0753 ⁽⁴⁾

TRANS 3-4 SHIFT SOL/TRANS RELAY CIRCUITS

P0783 ⁽⁴⁾

3-4 SHIFT SOL, NO RPM DROP AT LOCKUP

1/1 O2 SENSOR SLOW DURING CATALYST MONITOR

2/1 O2 SENSOR SLOW DURING CATALYST MONITOR

1/2 O2 SENSOR SLOW DURING CATALYST MONITOR

ENGINE IS COLD TOO LONG

FUEL PUMP/SYSTEM RELAY CONTROL CIRCUIT

CNG HIGH PRESSURE SOLENOID RELAY CIRCUIT

CNG PRESSURE SENSOR HIGH

CNG PRESSURE SENSOR LOW

TARGET IDLE NOT REACHED

NO 5 VOLTS TO MAP SENSOR

NO CHANGE IN MAP FROM START TO RUN

AUTO SHUTDOWN RELAY CONTROL CIRCUIT

NO AUTO SHUTDOWN RELAY OUTPUT VOLTAGE AT PCM

INTERMITTENT LOSS OF CMP OR CKP

MISFIRE ADAPTIVE NUMERATOR AT LIMIT

EVAP LEAK MONITOR PINCHED HOSE FOUND

P1492 ⁽²⁾

AMBIENT/BATTERY TEMP SENSOR VOLTS TOO HIGH

P1493 ⁽²⁾

AMBIENT/BATTERY TEMP SENSOR VOLTS TOO LOW

LEAK DETECTION PUMP SW OR MECHANICAL FAULT

LEAK DETECTION PUMP SOLENOID CIRCUIT

P1594 ⁽²⁾

CHARGING SYSTEM VOLTAGE TOO HIGH

P1595 ⁽⁵⁾

SPEED CONTROL SOLENOID CIRCUITS

P1596 ⁽⁵⁾

SPEED CONTROL SWITCH ALWAYS HIGH

P1597 ⁽⁵⁾

SPEED CONTROL SWITCH ALWAYS LOW

P1682 ⁽²⁾

CHARGING SYSTEM VOLTAGE TOO LOW

P1683 ⁽⁵⁾

SPD CTRL PWR RELAY OR S/C 12V DRIVER CIRCUIT

PCM FAILURE EEPROM WRITE DENIED

P1740 ⁽⁴⁾

TCC O/D SOLENOID PERFORMANCE

P1756 ⁽⁴⁾

GOV PRESS NOT EQUAL TO TARGET @ 15-20 PSI

P1757 ⁽⁴⁾

GOV PRESS ABOVE 3 PSI IN GEAR WITH 0 MPH

P1762 ⁽⁴⁾

GOV PRESS SEN OFFSET VOLTS TOO LOW OR HIGH

P1763 ⁽⁴⁾

GOVERNOR PRESSURE SENSOR VOLTS TOO HIGH

P1764 ⁽⁴⁾

GOVERNOR PRESSURE SENSOR VOLTS TOO LOW

P1765 ⁽⁴⁾

TRANS 12 VOLT SUPPLY RELAY CTRL CIRCUIT

P1899 ⁽⁴⁾

P/N PERFORMANCE

⁽¹⁾	Perform appropriate test under DIAGNOSTIC TESTS.

⁽²⁾	This DTC is related to charging system. For diagnostic procedure, see appropriate GENERATORS & REGULATORS article in STARTING & CHARGING SYSTEMS.

⁽³⁾	For diagnostic procedures, see appropriate MANUAL or AUTOMATIC A/C-HEATER SYSTEMS article in AIR CONDITIONING & HEATING.

⁽⁴⁾	This DTC is related to automatic transmission diagnostics. For diagnostic procedure, see appropriate DIAGNOSIS article in AUTOMATIC TRANSMISSIONS.

⁽⁵⁾	This DTC is related to cruise control system diagnostics. For diagnostic procedure, see appropriate CRUISE CONTROL SYSTEMS article in ACCESSORIES & EQUIPMENT.