DIAGNOSIS AND TESTING

• PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE
• INTERMITTENT CONDITION
• P0016-CRANKSHAFT / CAMSHAFT TIMING MISALIGNMENT
• P0031-O2 SENSOR 1/1 HEATER CIRCUIT LOW
• P0032-O2 SENSOR 1/1 HEATER CIRCUIT HIGH
• P0037-O2 SENSOR 1/2 HEATER CIRCUIT LOW
• P0038-O2 SENSOR 1/2 HEATER CIRCUIT HIGH
• P0051-O2 SENSOR 2/1 HEATER CIRCUIT LOW
• P0052-O2 SENSOR 2/1 HEATER CIRCUIT HIGH
• P0057-O2 SENSOR 2/2 HEATER CIRCUIT LOW
• P0058-O2 SENSOR 2/2 HEATER CIRCUIT HIGH
• P0071-AMBIENT AIR TEMPERATURE SENSOR PERFORMANCE
• P0072-AMBIENT AIR TEMPERATURE SENSOR CIRCUIT LOW
• P0073-AMBIENT AIR TEMPERATURE SENSOR CIRCUIT HIGH
• P0107-MANIFOLD ABSOLUTE PRESSURE SENSOR CIRCUIT LOW
• P0108-MANIFOLD ABSOLUTE PRESSURE SENSOR CIRCUIT HIGH
• P0111-INTAKE AIR TEMPERATURE SENSOR RATIONALITY
• P0112-INTAKE AIR TEMPERATURE SENSOR CIRCUIT LOW
• P0113-INTAKE AIR TEMPERATURE SENSOR CIRCUIT HIGH
• P0116-ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT PERFORMANCE
• P0117-ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT LOW
• P0118-ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT HIGH
• P0121-THROTTLE POSITION SENSOR 1 PERFORMANCE
• P0122-THROTTLE POSITION SENSOR 1 CIRCUIT LOW
• P0123-THROTTLE POSITION SENSOR 1 CIRCUIT HIGH
• P0125-INSUFFICIENT COOLANT TEMP FOR CLOSED-LOOP FUEL CONTROL
• P0128-THERMOSTAT RATIONALITY
• P0129-BAROMETRIC PRESSURE OUT-OF-RANGE LOW
• P0131-O2 SENSOR 1/1 CIRCUIT LOW
• P0132-O2 SENSOR 1/1 CIRCUIT HIGH
• P0133-O2 SENSOR 1/1 SLOW RESPONSE
• P0135-O2 SENSOR 1/1 HEATER PERFORMANCE
• P0137-O2 SENSOR 1/2 CIRCUIT LOW
• P0138-O2 SENSOR 1/2 CIRCUIT HIGH
• P0139-O2 SENSOR 1/2 SLOW RESPONSE
• P013A-O2 SENSOR 1/2 SLOW RESPONSE - RICH TO LEAN
• P013C-O2 SENSOR 2/2 SLOW RESPONSE - RICH TO LEAN
• P0141-O2 SENSOR 1/2 HEATER PERFORMANCE
• P0151-O2 SENSOR 2/1 CIRCUIT LOW
• P0152-O2 SENSOR 2/1 CIRCUIT HIGH
• P0153-O2 SENSOR 2/1 SLOW RESPONSE
• P0155-O2 SENSOR 2/1 HEATER PERFORMANCE
• P0157-O2 SENSOR 2/2 CIRCUIT LOW
• P0158-O2 SENSOR 2/2 CIRCUIT HIGH
• P0159-O2 SENSOR 2/2 SLOW RESPONSE
• P0161-O2 SENSOR 2/2 HEATER PERFORMANCE
• P0171-FUEL SYSTEM 1/1 LEAN
• P0172-FUEL SYSTEM 1/1 RICH
• P0174-FUEL SYSTEM 2/1 LEAN
• P0175-FUEL SYSTEM 2/1 RICH
• P0201-FUEL INJECTOR 1 CIRCUIT
• P0202-FUEL INJECTOR 2 CIRCUIT
• P0203-FUEL INJECTOR 3 CIRCUIT
• P0204-FUEL INJECTOR 4 CIRCUIT
• P0205-FUEL INJECTOR 5 CIRCUIT
• P0206-FUEL INJECTOR 6 CIRCUIT
• P0221-THROTTLE POSITION SENSOR 2 PERFORMANCE
• P0222-THROTTLE POSITION SENSOR 2 CIRCUIT LOW
• P0223-THROTTLE POSITION SENSOR 2 CIRCUIT HIGH
• P0300-MULTIPLE CYLINDER MISFIRE
• P0301-CYLINDER 1 MISFIRE
• P0302-CYLINDER 2 MISFIRE
• P0303-CYLINDER 3 MISFIRE
• P0304-CYLINDER 4 MISFIRE
• P0305-CYLINDER 5 MISFIRE
• P0306-CYLINDER 6 MISFIRE
• P0315-NO CRANK SENSOR LEARNED
• P0325-KNOCK SENSOR 1 CIRCUIT
• P0330-KNOCK SENSOR 2 CIRCUIT
• P0335-CRANKSHAFT POSITION SENSOR CIRCUIT
• P0339-CRANKSHAFT POSITION SENSOR INTERMITTENT
• P0340-CAMSHAFT POSITION SENSOR CIRCUIT
• P0344-CAMSHAFT POSITION SENSOR INTERMITTENT
• P0401-EGR SYSTEM PERFORMANCE
• P0403-EGR SOLENOID CIRCUIT
• P0404-EGR POSITION SENSOR RATIONALITY OPEN
• P0405-EGR POSITION SENSOR CIRCUIT LOW
• P0406-EGR POSITION SENSOR CIRCUIT HIGH
• P0420-CATALYST EFFICIENCY (BANK 1)
• P0430-CATALYST EFFICIENCY (BANK 2)
• P0440-GENERAL EVAP SYSTEM FAILURE
• P0441-EVAP PURGE SYSTEM PERFORMANCE
• P0443-EVAP PURGE SOLENOID CIRCUIT
• P0452-EVAP PRESSURE SWITCH STUCK CLOSED
• P0455-EVAP PURGE SYSTEM LARGE LEAK
• P0456-EVAP PURGE SYSTEM SMALL LEAK
• P0457-LOOSE FUEL CAP
• P0461-FUEL LEVEL SENSOR 1 PERFORMANCE
• P0462-FUEL LEVEL SENSOR 1 CIRCUIT LOW
• P0463-FUEL LEVEL SENSOR 1 CIRCUIT HIGH
• P0480-COOLING FAN 1 CONTROL CIRCUIT
• P0501-VEHICLE SPEED SENSOR 1 PERFORMANCE
• P0503-VEHICLE SPEED SENSOR 1 ERRATIC
• P0506-IDLE SPEED PERFORMANCE LOWER THAN EXCEPTED
• P0507-IDLE SPEED PERFORMANCE HIGHER THAN EXCEPTED
• P050B-COLD START IGNITION TIMING PERFORMANCE
• P050D-COLD START ROUGH IDLE
• P0513-INVALID SKIM KEY
• P0522-OIL PRESSURE TOO LOW
• P0532-A/C PRESSURE SENSOR CIRCUIT LOW
• P0533-A/C PRESSURE SENSOR CIRCUIT HIGH
• P0562-BATTERY VOLTAGE LOW
• P0563-BATTERY VOLTAGE HIGH
• P0571-BRAKE SWITCH 1 PERFORMANCE
• P0572-BRAKE SWITCH 1 STUCK ON
• P0573-BRAKE SWITCH 1 STUCK OFF
• P0579-SPEED CONTROL SWITCH 1 PERFORMANCE
• P0580-SPEED CONTROL SWITCH 1 CIRCUIT LOW
• P0581-SPEED CONTROL SWITCH 1 CIRCUIT HIGH
• P0585-SPEED CONTROL SWITCH 1/2 CORRELATION
• P0591-SPEED CONTROL SWITCH 2 PERFORMANCE
• P0592-SPEED CONTROL SWITCH 2 CIRCUIT LOW
• P0593-SPEED CONTROL SWITCH 2 CIRCUIT HIGH
• P0600-SERIAL COMMUNICATION LINK
• P0601-INTERNAL MEMORY CHECKSUM INVALID
• P0606-INTERNAL ECM PROCESSOR
• P060B-ETC A/D GROUND PERFORMANCE
• P060D-ETC LEVEL 2 APP PERFORMANCE
• P060E-ETC LEVEL 2 TPS PERFORMANCE
• P060F-ETC LEVEL 2 ECT PERFORMANCE
• P061A-ETC LEVEL 2 TORQUE PERFORMANCE
• P061C-ETC LEVEL 2 RPM PERFORMANCE
• P0622-GENERATOR FIELD CONTROL CIRCUIT
• P0627-FUEL PUMP CONTROL CIRCUIT
• P062C-ETC LEVEL 2 MPH PERFORMANCE
• P0630-VIN NOT PROGRAMMED IN PCM
• P0632-ODOMETER NOT PROGRAMMED IN PCM
• P0633-SKIM KEY NOT PROGRAMMED IN PCM
• P0642-SENSOR REFERENCE VOLTAGE 1 CIRCUIT LOW
• P0643-PRIMARY 5-VOLT SUPPLY CIRCUIT HIGH
• P0645-A/C CLUTCH CONTROL CIRCUIT
• P0652-SENSOR REFERENCE VOLTAGE 2 CIRCUIT LOW
• P0653-SENSOR REFERENCE VOLTAGE 2 CIRCUIT HIGH
• P0685-AUTO SHUTDOWN CONTROL CIRCUIT
• P0688-AUTO SHUTDOWN SENSE CIRCUIT LOW
• P0700-TRANSMISSION CONTROL SYSTEM (MIL REQUEST)
• P0703-BRAKE SWITCH 2 PERFORMANCE
• P0850-PARK/NEUTRAL SWITCH PERFORMANCE
• P1115-GENERAL TEMPERATURE RATIONALITY
• P1128 - CLOSED LOOP FUELING NOT ACHIEVED - BANK 1
• P1129-CLOSED LOOP FUELING NOT ACHIEVED - BANK 2
• P01404-EGR POSITION SENSOR RATIONALITY CLOSED
• P1501-VEHICLE SPEED SENSOR 1/2 CORRELATION - DRIVE WHEELS
• P1502-VEHICLE SPEED SENSOR 1/2 CORRELATION - NON DRIVE WHEELS
• P1572-BRAKE PEDAL STUCK ON
• P1573-BRAKE PEDAL STUCK OFF
• P1593-SPEED CONTROL SWITCH 1 STUCK
• P1607-PCM INTERNAL SHUTDOWN TIMER RATIONALITY
• P1618-SENSOR REFERENCE VOLTAGE 1 CIRCUIT ERRATIC
• P1628-SENSOR REFERENCE VOLTAGE 2 CIRCUIT ERRATIC
• P1696-EEPROM MEMORY WRITE DENIED/INVALID
• P1697-EMR (SRI) MILEAGE NOT STORED
• P1897-LEVEL 1 RPM BUS UNLOCK
• P2096-DOWNSTREAM FUEL TRIM SYSTEM 1 LEAN
• P2097-DOWNSTREAM FUEL TRIM SYSTEM 1 RICH
• P2098-DOWNSTREAM FUEL TRIM SYSTEM 2 LEAN
• P2099-DOWNSTREAM FUEL TRIM SYSTEM 2 RICH
• P2100-ELECTRONIC THROTTLE CONTROL MOTOR CIRCUIT
• P2101-ELECTRONIC THROTTLE CONTROL MOTOR PERFORMANCE
• P2107-ELECTRONIC THROTTLE CONTROL MODULE PROCESSOR
• P2110-ELECTRONIC THROTTLE CONTROL - FORCED LIMITED RPM
• P2111-ELECTRONIC THROTTLE CONTROL - UNABLE TO CLOSE
• P2112-ELECTRONIC THROTTLE CONTROL - UNABLE TO OPEN
• P2115-ACCELERATOR PEDAL POSITION SENSOR 1 MINIMUM STOP PERFORMANCE
• P2116-ACCELERATOR PEDAL POSITION SENSOR 2 MINIMUM STOP PERFORMANCE
• P2118-ELECTRONIC THROTTLE CONTROL MOTOR CIRCUIT
• P2122-ACCELERATOR PEDAL POSITION SENSOR 1 CIRCUIT LOW
• P2123-ACCELERATOR PEDAL POSITION SENSOR 1 CIRCUIT HIGH
• P2127-ACCELERATOR PEDAL POSITION SENSOR 2 CIRCUIT LOW
• P2128-ACCELERATOR PEDAL POSITION SENSOR 2 CIRCUIT HIGH
• P2135-THROTTLE POSITION SENSOR 1/2 CORRELATION
• P2138-ACCELERATOR PEDAL POSITION SENSOR 1/2 CORRELATION
• P2161-VEHICLE SPEED SENSOR 2 ERRATIC
• P2166-ACCELERATOR PEDAL POSITION SENSOR 1 MAXIMUM STOP PERFORMANCE
• P2167-ACCELERATOR PEDAL POSITION SENSOR 2 MAXIMUM STOP PERFORMANCE
• P2172-HIGH AIRFLOW/VACUUM LEAK DETECTED (INSTANTANEOUS ACCUMULATION)
• P2173-HIGH AIRFLOW/VACUUM LEAK DETECTED (SLOW ACCUMULATION)
• P2174-LOW AIRFLOW/RESTRICTION DETECTED (INSTANTANEOUS ACCUMULATION)
• P2175-LOW AIRFLOW/RESTRICTION DETECTED (SLOW ACCUMULATION)
• P2181-COOLING SYSTEM PERFORMANCE
• P2271-O2 SENSOR 1/2 SIGNAL STUCK RICH
• P2273-O2 SENSOR 2/2 SIGNAL STUCK RICH
• P2299-BRAKE PEDAL POSITION / ACCELERATOR PEDAL POSITION INCOMPATIBLE
• P2302-IGNITION COIL 1 SECONDARY CIRCUIT- INSUFFICIENT IONIZATION
• P2305-IGNITION COIL 2 SECONDARY CIRCUIT- INSUFFICIENT IONIZATION
• P2308-IGNITION COIL 3 SECONDARY CIRCUIT- INSUFFICIENT IONIZATION
• P2311-IGNITION COIL 4 SECONDARY CIRCUIT- INSUFFICIENT IONIZATION
• P2314-IGNITION COIL 5 SECONDARY CIRCUIT- INSUFFICIENT IONIZATION
• P2317-IGNITION COIL 6 SECONDARY CIRCUIT- INSUFFICIENT IONIZATION
• P2503-CHARGING SYSTEM OUTPUT LOW
• P2504-CHARGING SYSTEM OUTPUT HIGH
• P2610-PCM INTERNAL SHUTDOWN TIMER RATIONALITY TOO FAST
• U0001-CAN C BUS
• U0101-LOST COMMUNICATION WITH TCM
• U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE MODULE
• U0140-LOST COMMUNICATION WITH BODY CONTROL MODULE
• U0141-LOST COMMUNICATION WITH FCM/BCM
• U0155-LOST COMMUNICATION WITH CLUSTER
• U0168-LOST COMMUNICATION WITH SKIM/SKREEM (WCM)
• U110C-NO FUEL LEVEL BUS MESSAGE RECEIVED
• U110E-LOST AMBIENT TEMPERATURE MESSAGE
• U1110-LOST VEHICLE SPEED MESSAGE
• U1113-LOST A/C PRESSURE MESSAGE
• U1120-LOST WHEEL DISTANCE MESSAGE
• U1411-IMPLAUSIBLE FUEL VOLUME SIGNAL RECEIVED
• U1412-IMPLAUSIBLE VEHICLE SPEED SIGNAL RECEIVED
• U1417-IMPLAUSIBLE LEFT WHEEL DISTANCE SIGNAL RECEIVED
• U1418-IMPLAUSIBLE RIGHT WHEEL DISTANCE SIGNAL RECEIVED
• *ETC INTERMITTENT NO CRANK CONDITION
• *CHECKING THE EXHAUST SYSTEM FOR LEAKS
• *CHECKING THE FUEL DELIVERY SYSTEM
• *HARD START FUEL SYSTEM
• *ENGINE CRANKS BUT DOES NOT START
• *FUEL PRESSURE LEAK DOWN
• *NO CRANK CONDITION
• *NO RESPONSE WITH A NO START CONDITION
• *START AND STALL CONDITION