Note : Check items for each diagnostic item do not list all probable causes.
DTC No. | Diagnostic items | Trouble area |
P0031 | HO2S Heater Circuit Low (Bank 1, Sensor 1) | ● Blown or mission HO2S fuse ● Open or short to GND between HO2S and ECM ● Faulty HO2S |
P0032 | HO2S Heater Circuit High (Bank 1, Sensor 1) | ● Short to battery between HO2S and ECM ● Faulty HO2S |
P0037 | HO2S Heater Circuit Low (Bank 1, Sensor 2) | ● Blown or missing HO2S fuse ● Open or short to GND between HO2S and ECM ● Faulty HO2S |
P0038 | HO2S Heater Circuit High (Bank 1, Sensor 2) | ● Short to battery between HO2S and ECM ● Faulty HO2S |
P0051 | HO2S Heater Circuit Low (Bank 2, Sensor 1) | ● Blown or missing HO2S fuse ● Open or short to GND between HO2S and ECM ● Faulty HO2S |
P0052 | HO2S Heater Circuit High (Bank 2, Sensor 1) | ● Short to battery between HO2S and ECM ● Faulty HO2S |
P0057 | HO2S Heater Circuit Low (Bank 2, Sensor 2) | ● Blown or missing HO2S fuse ● Open or Short to GND between HO2S and ECM ● Faulty HO2S |
P0058 | HO2S Heater Circuit High (Bank 2, Sensor 2) | ● Short to battery between HO2S and ECM ● Faulty HO2S |
P0101 | Mass or Volume Air Flow Circuit Range/performance Problem | ● Dirty air cleaner ● Oil cap or dipstick missing or not installed correctly ● Air leak in intake system ● Contaminated, deteriorated or damaged mass air flow sensor ● Faulty mass air flow sensor or throttle position sensor ● Poor connections between ECM and MAFS or TPS note If any codes relating to MAFS are present, do all repairs associated with them before proceeding with this troubleshooting area. |
P0102 | Mass or Volume Air Flow Circuit Low Input | ● Short to ground between MAFS and ECM ● Signal line open between MAFS and ECM ● Faulty MAFS |
P0103 | Mass or Volume Air Flow Circuit High Input | ● Short to Battery between MAFS and ECM ● Ground open between MAFS and EGI main relay ● Ground open or Poor connections between open or short to battery between MAFS and ECM ● Faulty MAFS |
P0112 | Intake Air Temperature Circuit Low Input | ● Short to ground between IAT sensor and ECM ● Short between IAT sensor wires ● Faulty IAT sensor |
P0113 | Intake Air Temperature Circuit High Input | ● Open or short to battery between IAT sensor and ECM ● Faulty IAT sensor |
P0116 | Engine Coolant Temperature Sensor Circuit Range/Performance Problem | ● After engine start-up, the measured coolant temperature shows no variation after detecting the calculated coolant temperature variation (engine coolanttemperature sensor input is stuck.) ● Poor connections between ECT sensor and ECM ● Misplaced, loose or corroded terminals ● Foreign materials fouled ECTS ● Faulty ECTS note If any codes relating to ECTS are present, do all repairs associated with them before proceeding with this troubleshooting area. |
P0117 | Engine Coolant Temperature Circuit Low Input | ● Short to ground between ECTS and ECM ● Short between ECTS wires ● Faulty ECTS |
P0118 | Engine Coolant Temperature Circuit High Input | ● Open or short to battery between ECTS and ECM ● Faulty ECTS |
P0121 | Throttle Position Sensor Circuit Range/Performance Problem | ● Poor connections between TPS and ECM ● Misplaced, loose or corrodes terminals ● Contaminated, deteriorated TPS ● Open or short between TPS 5V reference and ECM ● Open or short between TPS signal and ECM ● Short between TPS wires ● Faulty TPS |
P0122 | Throttle Position Sensor Circuit Low Input | ● Short to GND between TPS and ECM ● Open short to GND between TPS and ECM ● Short to RND between ECM and fuel tank pressure sensor (FTPS) ● Faulty TPS or FTPS |
P0123 | Throttle Position Sensor Circuit High Input | ● Open or short to battery between TPS and ECM ● Open between and ECM ● Faulty TPS |
P0131 | HO2S Circuit Low Input (Bank 1, Sensor 1) | ● Short to GND between HO2S and ECM ● Faulty front HO2S |
P0132 | HO2S Circuit High Input (Bank 1, Sensor 1) | ● Short to battery between HO2S and ECM ● Faulty front HO2S |
P0133 | HO2S Circuit Slow Responsive (Bank 1, Sensor 1) | ● Front and rear HO2S connections reversed ● Faulty fuel delivery system ● Leak in intake system ● Leak in exhaust system ● Faulty MAFS ground circuit ● Faulty HO2S note If any misfire, purge solenoid valve, MAFS or HO2S heater codes are present, do all repairs associated with those codes before proceeding withthis trouble area. |
P0137 | HO2S Circuit Low Input (Bank 1, Sensor 2) | ● Short to GND between HO2S and ECM ● Faulty front HO2S |
P0138 | HO2S Circuit Low Input (Bank 1, Sensor 2) | ● Open or short to battery between HO2S and ECM ● Faulty front HO2S |
P0151 | HO2S Circuit Low Input (Bank 2, Sensor 1) | ● Short to GND between HO2S and ECM ● Faulty front HO2S |
P0152 | HO2S Circuit High Input (Bank 2, Sensor 1) | ● Short to battery between HO2S and ECM ● Faulty front HO2S |
P0153 | HO2S Circuit Slow Responsive (Bank 2, Sensor 1) | ● Front and rear HO2S connections reversed ● Faulty fuel delivery system ● Leak in intake system ● Leak in exhaust system ● Faulty MAFS ground circuit ● Faulty HO2S note If any misfire, purge solenoid valve, MAFS or HO2S heater codes are present, do all repairs associated with those codes before proceeding withthis trouble area. |
P0157 | HO2S Circuit Low Input (Bank 2, Sensor 2) | ● Short to GND between HO2S and ECM ● Faulty rear HO2S |
P0158 | HO2S Circuit High Input (Bank 2, Sensor 2) | ● Open or short to battery between HO2S and ECM ● Faulty rear HO2S |
P0171 | Fuel System Too Lean (Bank 1) | ● Faulty ignition system (Ignition coil/spark plug/Ignition cable) ● Faulty fuel delivery system (Fuel tank/Pressure regulator/Canister purge valve) ● Clogged fuel injectors ● Faulty fuel injectors ● Leak in intake system ● Leak in exhaust system ● Faulty MAFS note If any codes relating to injectors, HO2S, ECTS or MAFS are stored, do all repairs associated with those codes before proceeding with this troublearea. |
P0172 | Fuel System Too Rich (Bank 1) | ● Faulty fuel delivery system (Fuel tank/Pressure regulator/Canister purge valve) ● Faulty fuel injectors ● Faulty MAFS note If any codes relating to injectors, HO2S, ECTS or MAFS are stored, do all repairs associated with those codes before proceeding with this troublearea. |
P0174 | Fuel System Too Lean (Bank 2) | ● Faulty ignition system (Ignition coil/spark plug/Ignition cable) ● Faulty fuel delivery system (Fuel tank/Pressure regulator/Canister purge valve) ● Clogged fuel injectors ● Faulty fuel injectors ● Leak in intake system ● Leak in exhaust system ● Faulty MAFS note If any codes relating to injectors, HO2S, ECTS or MAFS are stored, do all repairs associated with those codes before proceeding with this troublearea. |
P0175 | Fuel System Too Rich (Bank 2) | ● Faulty fuel delivery system (Fuel tank/Pressure regulator/Canister purge valve) ● Faulty fuel injectors ● Faulty MAFS note If any codes relating to injectors, HO2S, ECTS or MAFS are stored, do all repairs associated with those codes before proceeding with this troublearea. |
P0230 | Fuel Pump Circuit Malfunction | ● Blown or missing fuse/relay ● Short to battery between fuel pump relay and ECM ● Open between fuel pump relay and ECM ● Faulty fuel pump relay |
P0261 | Injector Circuit Low Input (Cylinder -1) | ● Short to GND between injector and ECM ● Faulty fuel injector |
P0264 | Injector Circuit Low Input (Cylinder -2) | |
P0267 | Injector Circuit Low Input (Cylinder -3) | |
P0270 | Injector Circuit Low Input (Cylinder -4) | |
P0273 | Injector Circuit Low Input (Cylinder -5) | |
P0276 | Injector Circuit Low Input (Cylinder -6) | |
P0262 | Injector Circuit High Input (Cylinder -1) | ● Open between injector fuse and injector ● Open or short to battery between injector and ECM ● Faulty fuel injector |
P0265 | Injector Circuit High Input (Cylinder -2) | |
P0268 | Injector Circuit High Input (Cylinder -3) | |
P0271 | Injector Circuit High Input (Cylinder -4) | |
P0274 | Injector Circuit High Input (Cylinder -5) | |
P0277 | Injector Circuit High Input (Cylinder -6) | |
P0300 | Random Misfire Detected | ● Vacuum leak in air intake system ● CKP sensor circuit malfunction ● Faulty CKP sensor ● Ignition circuit malfunction ● Faulty ignition coil or plug wire ● Spark plug malfunction ● Low compression due to blown head gasket, leaking valve or piston ring ● Low/high fuel pressure due to faulty pressure regulator, restricted fuel lines, plugged fuel filter or faulty fuel pump ● Fuel injector circuit malfunction ● Faulty fuel injector note If any fuel injector codes (or pending codes) are present, do all repairs associated with those codes before proceeding with this trouble area. |
P0301 | Misfire Detected (Cylinder -1) | |
P0302 | Misfire Detected (Cylinder -2) | |
P0303 | Misfire Detected (Cylinder -3) | |
P0304 | Misfire Detected (Cylinder -4) | |
P0305 | Misfire Detected (Cylinder -5) | |
P0306 | Misfire Detected (Cylinder -6) | |
P0325 | Knock Sensor Circuit Malfunction (Bank 1) | ● Open or short to GND between knock sensor and ECM ● Source of high resistance between knock sensor and ECM ● Faulty knock sensor |
P0330 | Knock Sensor Circuit Malfunction (Bank 2) | |
P0335 | Crankshaft Position Sensor Circuit Malfunction | ● Short to GND between CKP sensor and ECM ● Open or short to battery between CKP and ECM ● Short between CKP sensor wires ● Poor connection between CKP connector & harness connector ● Out of allowable air gap ● Faulty target wheel tolerance ● Faulty CKP sensor |
P0340 | Camshaft Position Sensor Circuit Malfunction | ● Short to GND between CMP sensor and ECM ● Open or short to battery between CMP and ECM ● Short between CMP sensor wires ● Poor connection between CMP connector & harness connector ● Faulty CMP sensor |
P0350 | Ignition Coil Primary/Secondary Circuit Malfunction | ● Faulty ignition system ● Poor connection ● Faulty wires between ignition coil and ECM ● Faulty ignition coil |
P0420 | Main catalyst efficiency deterioration (Bank 1) | ● Catalytic converter deteriorated note If any codes relating to HO2S sensor. MAFS, injectors, a P0170 or a P0173 are present, do all repairs associated with them before proceeding withthis trouble area. |
P0430 | Main catalyst efficiency deterioration (Bank 2) | ● Catalytic converter deteriorated note If any codes relating to HO2S sensor. MAFS, injectors, a P0170 or a P0173 are present, do all repairs associated with them before proceeding withthis trouble area. |
P0444 | EVAP Emission Control System Purge Control Valve Circuit Open | ● Faulty PSV ● Open between PSV and ECM |
P0445 | EVAP Emission Control System Purge Control Valve Circuit Shorted | ● Faulty PSV ● Short to GND or battery between PSV and ECM |
P0501 | Vehicle Speed Sensor Range/Performance | ● Open between fuse and wheel speed sensor (WSS) ● Open between WSS and GND ● Open between WSS and ECM ● Short to battery or GND between WSS and ECM ● Faulty WSS |
P0506 | Idle Control System Rpm Lower than Expected | ● High resistance between injector fuse and IAC valve ● High resistance between IAC and ECM ● Faulty IAC valve ● Carbon fouled throttle plate note If any TPS, MAFS, fuel injector or IAC valve circuit codes (or pending codes) are present, do all repairs associated with them before proceedingwith this trouble area. |
P0507 | Idle Control System rpm Higher than Expected | ● Improperly adjusted accelerator cable ● Air leak in intake system between head and throttle plate ● Faulty PCV valve or PSV ● Poor connections in TPS circuit or faulty TPS ● High resistance between IAC valve and ECM ● Faulty IAC valve note If any codes relating to TPS, MAFS, fuel injector or IAC valve are present, do all repairs associated with them before proceeding with this troubleshootingarea. |
P0560 | System Voltage Malfunction | ● Short between main relay and ECM ● Open between main relay and ECM ● Poor connection ● Faulty main relay |
P0650 | Malfunction Indication Lamp (MIL) Control Circuit Malfunction | ● Open or short between lamp and ECM ● Faulty lamp |
P1505 | Idle Charge Actuator Signal Low of Coil #1 | ● Open or short to GND between ISC and ECM ● Faulty ISC |
P1506 | Idle Charge Actuator Signal High of Coil #1 | ● Short to battery between ISC and ECM ● Faulty ISC |
P1507 | Idle Charge Actuator Signal Low of Coil #2 | ● Open or short to GND between ISC and ECM ● Faulty ISC |
P1508 | Idle Charge Actuator Signal High of Coil #2 | ● Short to battery between ISC and ECM ● Faulty ISC |
P1521 | Power Steering Switch Malfunction | ● Open or short to battery between switch and ECM ● Short to GND between switch and ECM ● Open between switch and ECM ● Faulty power steering switch |
P1529 | TCU Request for MIL ON/Freeze Frame to ECU via CAN | ● This is only a request from TCM to turn the MIL ON. The fault code is stored in the TCM. The freeze frame data is stored in the ECM under the P1529 request code. Be sure to retrieve freeze frame data before clearing code P1529from ECM. |
P1602 | Serial Communication Problem with TCU (Timeout) | ● Open or short to serial communication line ● CAN message timeout ● Faulty TCU |
P1624 | Cooling Fan Relay Circuit Malfunction (LOW) | ● Open or short between relay and ECM ● Short to GND between relay and ECM ● Open between relay and ECM ● Faulty relay |
P1625 | Cooling Fan Relay Circuit Malfunction (HIGH) |
DTC | Diagnostic item |
P0031 P0032 P0037 P0038 P0051 P0052 P0057 P0058 | HO2S Heater Circuit Low (Bank 1, Sensor 1) HO2S Heater Circuit High (Bank 1, Sensor 1) HO2S Heater Circuit Low (Bank 1, Sensor 2) HO2S Heater Circuit High (Bank 1, Sensor 2) HO2S Heater Circuit Low (Bank 2, Sensor 1) HO2S Heater Circuit High (Bank 2, Sensor 1) HO2S Heater Circuit Low (Bank 2, Sensor 2) HO2S Heater Circuit High (Bank 2, Sensor 2) |
DTC | Diagnostic item |
P0101 P0102 P0103 | Mass Air Flow Circuit Range/Performance Problem Mass Air Flow Circuit Low Voltage Mass Air Flow Circuit High Voltage |
DTC | Diagnostic item |
P0112 P0113 | Intake Air Temperature Circuit Low Input Intake Air Temperature Circuit High Input |
DTC | Diagnostic item |
P0116 | Engine Coolant Temperature Circuit Range/Performance Problem |
DTC | Diagnostic item |
P0117 P0118 | Engine Coolant Temperature Circuit Low Input Engine Coolant Temperature Circuit High Input |
DTC | Diagnostic item |
P0121 P0122 P0123 | Throttle Position Sensor Circuit Range/Performance Problem Throttle Position Sensor Circuit Low Input Throttle Position Sensor Circuit High Input |
DTC | Diagnostic item |
P0131 P0132 P0137 P0138 P0151 P0152 P0157 P0158 | HO2S Circuit Low Input (Bank 1, Sensor 1) HO2S Circuit High Input (Bank 1, Sensor 1) HO2S Circuit Low Input (Bank 1, Sensor 2) HO2S Circuit High Input (Bank 1, Sensor 2) HO2S Circuit Low Input (Bank 2, Sensor 1) HO2S Circuit High Input (Bank 2, Sensor 1) HO2S Circuit Low Input (Bank 2, Sensor 2) HO2S Circuit High Input (Bank 2, Sensor 2) |
DTC | Diagnostic item |
P0133 P0153 | HO2S Circuit Slow Responsive (Bank 1, Sensor 1) HO2S Circuit Slow Responsive (Bank 2, Sensor 1) |
DTC | Diagnostic item |
P0171 P0172 P0174 P0175 | Fuel System Too Lean (Bank 1) Fuel System Too Rich (Bank 1) Fuel System Too Lean (Bank 2) Fuel System Too Rich (Bank 2) |
DTC | Diagnostic item |
P0261 P0264 P0267 P0270 P0273 P0276 P0262 P0265 P0268 P0271 P0274 P0277 | Cylinder 1 Injector Circuit Low Input Cylinder 2 Injector Circuit Low Input Cylinder 3 Injector Circuit Low Input Cylinder 4 Injector Circuit Low Input Cylinder 5 Injector Circuit Low Input Cylinder 6 Injector Circuit Low Input Cylinder 1 Injector Circuit High Input Cylinder 2 Injector Circuit High Input Cylinder 3 Injector Circuit High Input Cylinder 4 Injector Circuit High Input Cylinder 5 Injector Circuit High Input Cylinder 6 Injector Circuit High Input |
DTC | Diagnostic item |
P0230 | Fuel Pump Circuit Malfunction |
DTC | Diagnostic item |
P0300 P0301 P0302 P0303 P0304 P0305 P0306 | Random Misfire Detected Cylinder 1 Misfire Detected Cylinder 2 Misfire Detected Cylinder 3 Misfire Detected Cylinder 4 Misfire Detected Cylinder 5 Misfire Detected Cylinder 6 Misfire Detected |
DTC | Diagnostic item |
P0325 P0330 | Knock Sensor Circuit Malfunction (Bank 1) Knock Sensor Circuit Malfunction (Bank 2) |
DTC | Diagnostic item |
P0335 | Crankshaft Position Sensor Circuit Malfunction |
DTC | Diagnostic item |
P0340 | Camshaft Position Sensor Circuit Malfunction |
DTC | Diagnostic item |
P0350 P0351 P0352 P0353 P0354 P0355 P0356 | Ignition Coil Primary/Secondary Circuit Malfunction Ignition Coil "#1" Primary/Secondary Circuit Malfunction Ignition Coil "#2" Primary/Secondary Circuit Malfunction Ignition Coil "#3" Primary/Secondary Circuit Malfunction Ignition Coil "#4" Primary/Secondary Circuit Malfunction Ignition Coil "#5" Primary/Secondary Circuit Malfunction Ignition Coil "#6" Primary/Secondary Circuit Malfunction |
DTC | Diagnostic item |
P0420 P0430 | Main Catalyst Efficiency Deterioration (Bank 1) Main Catalyst Efficiency Deterioration (Bank 2) |
DTC | Diagnostic item |
P0444 P0445 | EVAP Emission Control System Purge Control Valve Circuit Open EVAP Emission Control System Purge Control Valve Circuit Shorted |
DTC | Diagnostic item |
P0501 | Vehicle Speed Sensor Circuit Range/Performance |
DTC | Diagnostic item |
P0506 | Idle Control System Rpm Lower Than Expected |
DTC | Diagnostic item |
P0507 | Idle Control System Rpm Higher Than Expected |
DTC | Diagnostic item |
P0560 | System Voltage Malfunction |
DTC | Diagnostic item |
P0650 | Malfunction Indication Lamp(MIL) Control Circuit Malfunction |
DTC | Diagnostic item |
P1134 P1154 | HO2S Circuit Transition Switch Malfunction/Slip (Bank 1, Sensor 1) HO2S Circuit Transition Switch Malfunction/Slip (Bank 2, Sensor 1) |
DTC | Diagnostic item |
P1166 P1167 | Lambda Bank Control Limit (Bank 1) Lambda Bank Control Limit (Bank 2) |
DTC | Diagnostic item |
P1372 | Segment Time Acquisition Incorrect |
DTC | Diagnostic item |
P1505 P1506 P1507 P1508 | Idle Charge Actuator Signal Low (Coil 1) Idle Charge Actuator Signal High (Coil 1) Idle Charge Actuator Signal Low (Coil 2) Idle Charge Actuator Signal High (Coil 2) |
DTC | Diagnostic item |
P1521 | Power Steering Switch Malfunction |
DTC | Diagnostic item |
P1602 | Serial Communication Problem With TCU (time-out) |
DTC | Diagnostic item |
P1624 | Cooling Fan Relay Circuit Malfunction (Low) |
DTC | Diagnostic item |
P1625 | Cooling Fan Relay Circuit Malfunction (High) |
