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Diagnostic Trouble Code (DTC) Identification

DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

DTC Description Probable Cause
P0100 (1) Mass Airflow (MAF) Sensor Circuit Malfunction Open/Short Circuit, MAF Sensor Or ECM
P0101 (1) Mass Airflow (MAF) Circuit Range/Performance Fault MAF Sensor
P0110  Intake Air Temperature (IAT) Sensor Circuit Open/Short Circuit, IAT Sensor Or ECM
P0115  Engine Coolant Temperature (ECT) Sensor Circuit Fault Open/Short Circuit, ECT Sensor Or ECM
P0116 (1) ECT Sensor Circuit Range/Performance Fault ECT Sensor Or Cooling System
P0120  Throttle Position (TP) Sensor Malfunction Open/Short Circuit, TP Sensor Or ECM
P0121 (1) Throttle Position (TP) Sensor Circuit Range/Performance TP Sensor
P0125 (2) Insufficient Coolant Temperature For Closed Loop Open/Short Circuit, HO2S or ECM
P0125 (3) Insufficient Coolant Temperature For Closed Loop Open/Short Circuit, A/F Sensor or ECM
P0130 (1)(2) (4) Heated Oxygen Sensor Circuit Malfunction (Bank 1, Sensor 1) HO2S Or Fuel Trim Malfunction
P0133 (1) (4) Heated Oxygen Sensor Circuit Slow Response (Bank 1, Sensor 1) HO2S
P0135 (1) (4) Heated Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 1) Open/Short In Heater Circuit, HO2S Or ECM
P0136 (1) (4) Heated Oxygen Sensor Circuit Malfunction (Bank 1, Sensor 2) HO2S
P0141 (1) (4) Heated Oxygen Sensor Heater Circuit Malfunction (Bank 1, Sensor 2) Open/Short In Heater Circuit, HO2S Or ECM
P0150 (1)(2) (4) Heated Oxygen Sensor Circuit Malfunction (Bank 2, Sensor 1) HO2S Or Fuel Trim Malfunction
P0153 (1) (4) Heated Oxygen Sensor Circuit Slow Response (Bank 2, Sensor 1) HO2S
P0155 (1) (4) Heated Oxygen Sensor Heater Circuit Malfunction (Bank 2, Sensor 1) Open/Short In Heater Circuit, HO2S Or ECM
P0171 (1) System Too Lean (Fuel Trim) Air Hose, Incorrect Fuel Pressure, Injector Blockage, HO2S, MAF Sensor, ECT Sensor Or Exhaust Gas leakage
P0172 (1) System Too Rich (Fuel Trim) Incorrect Fuel Pressure, Injector Leak Or Blockage, HO2S, MAF Sensor, ECT Sensor Or Exhaust Gas Leakage
P0300  Random Misfire Detected Ignition, Injector, Incorrect Fuel, Pressure, Compression, Valve Clearance, Valve Timing, MAF Sensor, ECT Sensor, Open/Short Circuit, Loose Connector Or ECM
P0301 (1) Cylinder No. 1 Misfire Detected Ignition, Injector, Incorrect Fuel, Pressure, Compression, Valve Clearance, Valve Timing, MAF Sensor, ECT Sensor, Open/Short Circuit, Loose Connector Or ECM
P0302 (1) Cylinder No. 2 Misfire Detected Ignition, Injector, Incorrect Fuel, Pressure, Compression, Valve Clearance, Valve Timing, MAF Sensor, ECT Sensor, Open/Short Circuit, Loose Connector Or ECM
P0303 (1) Cylinder No. 3 Misfire Detected Ignition, Injector, Incorrect Fuel, Pressure, Compression, Valve Clearance, Valve Timing, MAF Sensor, ECT Sensor, Open/Short Circuit, Loose Connector Or ECM
P0304 (1) Cylinder No. 4 Misfire Detected Ignition, Injector, Incorrect Fuel, Pressure, Compression, Valve Clearance, Valve Timing, MAF Sensor, ECT Sensor, Open/Short Circuit, Loose Connector Or ECM
P0305 (1) Cylinder No. 5 Misfire Detected Ignition, Injector, Incorrect Fuel, Pressure, Compression, Valve Clearance, Valve Timing, MAF Sensor, ECT Sensor, Open/Short Circuit, Loose Connector Or ECM
P0306 (1) Cylinder No. 6 Misfire Detected Ignition, Injector, Incorrect Fuel, Pressure, Compression, Valve Clearance, Valve Timing, MAF Sensor, ECT Sensor, Open/Short Circuit, Loose Connector Or ECM
P0325  Knock Sensor No. 1 Circuit Malfunction Open/Short Circuit, Loose Sensor Or ECM
P0330  Knock Sensor No. 2 Circuit Malfunction Open/Short Circuit, Loose Sensor Or ECM
P0335 (1) Crankshaft Position (CKP) Sensor Circuit Malfunction Open/Short Circuit, CKP Sensor, Starter Or ECM
P0340 (1) Camshaft Position (CMP) Sensor Circuit Malfunction Open/Short Circuit, CMP Sensor, Starter Or ECM
P0401 (1) Insufficient EGR Flow Detected EGR Valve Stuck Closed, Open/Short EGR Gas Temperature Sensor Circuit, EGR Gas Temperature Sensor, EGR VSV Open Circuit, EGR VSV, Vacuum Control Valve, Vacuum Hose Disconnected Or Blocked, Or ECM
P0402 (1) Excessive EGR Flow Detected EGR Valve Stuck Open, Open/Short EGR Valve Position Sensor Circuit, EGR Valve Position Sensor, EGR VSV Open, EGR VSV Short Circuit Or ECM
P0420 (1)(2) Catalyst System Efficiency Below Threshold Catalytic Converter, Oxygen Sensor Or Circuit
P0420 (1)(3) Catalyst System Efficiency Below Threshold Catalytic Converter, Oxygen Sensor Or Circuit, A/F Sensor or Circuit
P0440 (1) EVAP System Malfunction Vapor Pressure Sensor Or Circuit, Charcoal Canister, Gas Cap, Fuel Tank Or Faulty Vacuum Circuit
P0441 (1) Incorrect EVAP Purge Flow Open/Short EVAP VSV Circuit, Vapor Pressure Sensor Or Circuit, Charcoal Canister Or Faulty Vacuum Circuit
P0446 (1) EVAP Vent Control Malfunction Open/Short EVAP VSV Circuit, Vapor Pressure Sensor Or Circuit, Charcoal Canister Or Faulty Vacuum Circuit
P0450  EVAP Pressure Sensor Malfunction Open/Short Vapor Pressure Sensor Circuit, Vapor Pressure Sensor Or ECM
P0451  EVAP Pressure Sensor Range/Performance Open/Short Vapor Pressure Sensor Circuit, Vapor Pressure Sensor Or ECM
P0500 (1) Vehicle Speed Sensor Malfunction Vehicle Speed Sensor Or Circuit, Instrument Cluster, ECM or ABS ECU
P0505 (1) Idle Control System Malfunction IAC Valve Or Circuit, Open/Short A/C Signal Circuit Or Loose Air Intake Hose
P1130 (1)(3) Air/Fuel Ratio Sensor (AFS) Circuit Range/Performance Open/Short A/F Circuit, AFS Or ECM
P1133 (1) Air/Fuel Ratio Sensor (AFS) Response Malfunction AFS
P1135 (1) Air/Fuel Ratio Sensor (AFS) Heater Circuit Malfunction Open/Short AFS Heater Circuit, AFS Or ECM
P1150 (1)(3) Air/Fuel Ratio Sensor (AFS) Circuit Range/Performance Open/Short AFS Heater Circuit, AFS Or ECM
P1153 (1) Air/Fuel Ratio Sensor (AFS) Response Malfunction AFS
P1155 (1) Air/Fuel Ratio Sensor (AFS) Heater Circuit Malfunction Open/Short AFS Heater Circuit, AFS Heater Or ECM
P1300  Ignitor Circuit Malfunction Ignitor Circuit To ECM, Ignitor, Coil/Igniter Or ECM
P1335  Crankshaft Position (CKP) Sensor Circuit Open/Short CKP Sensor Circuit, CKP Sensor Or ECM
P1410 (1) EGR Valve Position Sensor Circuit Malfunction Open/Short EGR Valve Position Sensor Circuit, EGR Valve Position Sensor Or ECM
P1411 (1) EGR Valve Position Sensor Circuit Range/Performance EGR Valve Position Sensor
P1520 (1) Stoplight Switch Signal Malfunction Short Circuit, Stoplight Switch Or ECM
P1600  ECM BATT Malfunction ECM Power Source Circuit Or ECM
P1780 (1) Park/Neutral Position Switch Malfunction Park/Neutral Position Switch/Circuit Or ECM
(1) Two-trip detection logic code. For more information, see DETECTION LOGIC  under INTRODUCTION.
(2) Except California models.
(3) California models only.
(4) Bank No. 1 refers to bank that includes cylinder No. 1. Bank No. 2 refers to bank without cylinder No. 1. Sensor No. 1 refers to sensor closest to engine block.
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