EOBD codes starting with P0400 to P0499

Trouble code = P0400
Fault location = Exhaust gas recirculation (EGR) system - flow malfunction
Probable cause = Hose leak/blockage, basic setting not carried out (if applicable), wiring, EGR valve. EGR solenoid, ECM

Trouble code = P0401
Fault location = Exhaust gas recirculation (EGR) system - insufficient flow detected
Probable cause = Hose leak/blockage, basic setting not carried out (if applicable), wiring, EGR valve

Trouble code = P0402
Fault location = Exhaust gas recirculation (EGR) system - excessive flow detected
Probable cause = Hose leak/blockage, basic setting not carried out (if applicable), wiring, EGR valve

Trouble code = P0403
Fault location = Exhaust gas recirculation (EGR) - circuit malfunction
Probable cause = Wiring, EGR solenoid, ECM

Trouble code = P0404
Fault location = Exhaust gas recirculation (EGR) system - range/performance problem
Probable cause = Hose leaklblockage, wiring, EGR valve/solenoid

Trouble code = P0405
Fault location = Exhaust gas recirculation (EGR) valve position sensor A - low input
Probable cause = Wiring short to earth, EGR valve position sensor, ECM

Trouble code = P0406
Fault location = Exhaust gas recirculation (EGR) valve position sensor A - high input
Probable cause = Wiring short to positive, EGR valve position sensor, ECM

Trouble code = P0407
Fault location = Exhaust gas recirculation (EGR) valve position sensor B - low input
Probable cause = Wiring short to earth, EGR valve position sensor, ECM

Trouble code = P0408
Fault location = Exhaust gas recirculation (EGR) valve position sensor B - high input
Probable cause = Wiring short to positive, EGR valve position sensor, ECM

Trouble code = P0409
Fault location = Exhaust gas recirculation (EGR) sensor A - circuit malfunction
Probable cause = Wiring, poor connection, EGR sensor, ECM

Trouble code = P0410
Fault location = Secondary air injection (AIR) system - malfunction
Probable cause = Wiring, AIR valve, AIR solenoid, ECM

Trouble code = P0411
Fault location = Secondary air injection (AIR) system - incorrect flow detected
Probable cause = AIR pump, AIR valve. AIR hose(s)

Trouble code = P0412
Fault location = Secondary air injection (AIR) solenoid A - circuit malfunction
Probable cause = Wiring, AIR solenoid, ECM

Trouble code = P0413
Fault location = Secondary air injection (AIR) solenoid A - open circuit
Probable cause = Wiring open circuit, AIR solenoid, ECM

Trouble code = P0414
Fault location = Secondary air injection (AIR) solenoid A - short circuit
Probable cause = Wiring short circuit, AIR solenoid, ECM

Trouble code = P0415
Fault location = Secondary air injection (AIR) solenoid B - circuit malfunction
Probable cause = Wiring, AIR solenoid, ECM

Trouble code = P0416
Fault location = Secondary air injection (AIR) solenoid B - open circuit
Probable cause = Wiring open circuit, AIR solenoid, ECM

Trouble code = P0417
Fault location = Secondary air injection (AIR) solenoid B - short circuit
Probable cause = Wiring short circuit, AIR solenoid, ECM

Trouble code = P0418
Fault location = Secondary air injection (AIR) pump relay A - circuit malfunction
Probable cause = Wiring, AIR pump relay, ECM

Trouble code = P0419
Fault location = Secondary air injection (AIR) pump relay B - circuit malfunction
Probable cause = Wiring, AIR pump relay, ECM

Trouble code = P0420
Fault location = Catalytic converter system, bank 1 - efficiency below threshold
Probable cause = Catalytic converter, wiring, HO2S 2

Trouble code = P0421
Fault location = Warm up catalytic converter, bank 1 - efficiency below threshold
Probable cause = Catalytic converter, wiring, HO2S 2

Trouble code = P0422
Fault location = Main catalytic converter, bank 1 - efficiency below threshold
Probable cause = Catalytic converter, wiring, HO2S 2

Trouble code = P0423
Fault location = Heated catalytic converter, bank 1 - efficiency below threshold
Probable cause = Catalytic converter, wiring, HO2S 2

Trouble code = P0424
Fault location = Heated catalytic converter, bank 1 - temperature below threshold
Probable cause = Catalytic converter, wiring, HO2S 2

Trouble code = P0425
Fault location = Catalytic converter temperature sensor, bank 1
Probable cause = Wiring, poor connection, catalytic converter temperature sensor, ECM

Trouble code = P0426
Fault location = Catalytic converter temperature sensor, bank 1 - range/performance
Probable cause = Wiring, poor connection, catalytic converter temperature sensor

Trouble code = P0427
Fault location = Catalytic converter temperature sensor, bank 1 - low input
Probable cause = Wiring short to earth, catalytic converter temperature sensor. ECM

Trouble code = P0428
Fault location = Catalytic converter temperature sensor, bank 1 - high input
Probable cause = Wiring short to positive, catalytic converter temperature sensor, ECM

Trouble code = P0429
Fault location = Catalytic converter heater, bank 1 - control circuit malfunction
Probable cause = Wiring, relay, ECM

Trouble code = P0430
Fault location = Catalytic converter system, bank 2 - efficiency below threshold
Probable cause = Catalytic converter, wiring, HO2S 2

Trouble code = P0431
Fault location = Warm up catalytic converter, bank 2 - efficiency below threshold
Probable cause = Catalytic converter, wiring, HO2S 2

Trouble code = P0432
Fault location = Main catalytic converter, bank 2 - efficiency below threshold
Probable cause = Catalytic converter, wiring, HO2S 2

Trouble code = P0433
Fault location = Heated catalytic converter, bank 2 - efficiency below threshold
Probable cause = Catalytic converter, wiring, HO2S 2

Trouble code = P0434
Fault location = Heated catalytic converter, bank 2 - temperature below threshold
Probable cause = Catalytic converter, wiring, HO2S 2

Trouble code = P0435
Fault location = Catalytic converter temperature sensor, bank 2
Probable cause = Wiring, poor connection, catalytic converter temperature sensor, ECM

Trouble code = P0436
Fault location = Catalytic converter temperature sensor, bank 2 - range/performance
Probable cause = Wiring, poor connection, catalytic converter temperature sensor

Trouble code = P0437
Fault location = Catalytic converter temperature sensor, bank 2 - low input
Probable cause = Wiring short to earth, catalytic converter temperature sensor, ECM

Trouble code = P0438
Fault location = Catalytic converter temperature sensor, bank 2 - high input
Probable cause = Wiring short to positive, catalytic converter temperature sensor, ECM

Trouble code = P0439
Fault location = Catalytic converter heater, bank 2 - control circuit malfunction
Probable cause = Wiring, relay, ECM

Trouble code = P0440
Fault location = Evaporative emission (EVAP) system - malfunction
Probable cause = Hose connection(s), intake leak, EVAP canister purge valve

Trouble code = P04041
Fault location = Evaporative emission (EVAP) system - incorrect flow detected
Probable cause = Hose connection(s), intake leak, EVAP canister purge valve

Trouble code = P0442
Fault location = Evaporative emission (EVAP) system - small leak detected
Probable cause = Hose connection(s), intake leak, EVAP canister, EVAP canister purge valve

Trouble code = P0443
Fault location = Evaporative emission (EVAP) canister purge valve - circuit malfunction
Probable cause = Wiring, EVAP canister purge valve, ECM

Trouble code = P0444
Fault location = Evaporative emission (EVAP) canister purge valve - open circuit
Probable cause = Wiring open circuit, EVAP canister purge valve, ECM

Trouble code = P0445
Fault location = Evaporative emission (EVAP) canister purge valve - short circuit
Probable cause = Wiring short circuit, EVAP canister purge valve, ECM

Trouble code = P0446
Fault location = Evaporative emission (EVAP) system, vent control - circuit malfunction
Probable cause = Wiring, EVAP canister purge valve, ECM

Trouble code = P0447
Fault location = Evaporative emission (EVAP) system, vent control - open circuit
Probable cause = Wiring open circuit, EVAP canister purge valve, ECM

Trouble code = P0448
Fault location = Evaporative emission (EVAP) system, vent control - short circuit
Probable cause = Wiring short circuit, EVAP canister purge valve, ECM

Trouble code = P0449
Fault location = Evaporative emission (EVAP) system, vent valve - circuit malfunction
Probable cause = Wiring, EVAP canister purge valve, ECM

Trouble code = P0450
Fault location = Evaporative emission (EVAP) pressure sensor - circuit malfunction
Probable cause = Wiring, EVAP pressure sensor, ECM

Trouble code = P0451
Fault location = Evaporative emission (EVAP) pressure sensor - range/performance problem
Probable cause = EVAP pressure sensor

Trouble code = P0452
Fault location = Evaporative emIssion (EVAP) pressure sensor - low input
Probable cause = Wiring short to earth, EVAP pressure sensor, ECM

Trouble code = P0453
Fault location = Evaporative emission (EVAP) pressure sensor - high input
Probable cause = Wiring short to positive, EVAP pressure sensor, ECM

Trouble code = P0454
Fault location = Evaporative emission (EVAP) pressure sensor - circuit intermittent
Probable cause = Wiring, poor connection, EVAP pressure sensor, ECM

Trouble code = P0455
Fault location = Evaporative emission (EVAP) system - large leak detected
Probable cause = Hose connection(s), intake leak, EVAP canister, EVAP canister purge valve

Trouble code = P0456
Fault location = Evaporative emission (EVAP) system - very small teak detected
Probable cause = Mechanical fault, hose connection(s), EVAP pressure sensor

Trouble code = P0457
Fault location = Evaporative emission (EVAP) system - leak detected (filler cap loose/off)
Probable cause = Mechanical fault, hose connection(s), EVAP pressure sensor

Trouble code = P0458
Fault location = Evaporative emission (EVAP) system, EVAP valve - circuit low
Probable cause = Wiring short to earth, EVAP valve

Trouble code = P0459
Fault location = Evaporative emission (EVAP) system, EVAP valve - circuit high
Probable cause = Wiring short to positive, EVAP valve

Trouble code = P0460
Fault location = Fuel tank level sensor - circuit malfunction
Probable cause = Wiring, fuel tank level sensor, ECM

Trouble code = P0461
Fault location = Fuel tank level sensor - range/performance problem
Probable cause = Wiring, fuel tank level sensor

Trouble code = P0462
Fault location = Fuel tank level sensor - low input
Probable cause = Wiring short to earth, fuel tank level sensor, ECM

Trouble code = P0463
Fault location = Fuel tank level sensor - high input
Probable cause = Wiring short to positive, fuel tank level sensor, ECM

Trouble code = P0464
Fault location = Fuel tank level sensor - circuit intermittent
Probable cause = Wiring, poor connection, fuel tank level sensor, ECM

Trouble code = P0465
Fault location = Evaporative emission (EVAP) canister purge flow sensor - circuit malfunction
Probable cause = Wiring, EVAP canister purge flow sensor, ECM

Trouble code = P0466
Fault location = Evaporative emission (EVAP) canister purge flow sensor - range/performance problem
Probable cause = EVAP canister purge flow sensor

Trouble code = P0467
Fault location = Evaporative emission (EVAP) canister purge flow sensor - low input
Probable cause = Wiring short to earth, EVAP canister purge flow sensor, ECM

Trouble code = P0468
Fault location = Evaporative emission (EVAP) canister purge flow sensor - high input
Probable cause = Wiring short to positive, EVAP canister purge flow sensor, ECM

Trouble code = P0469
Fault location = Evaporative emission (EVAP) canister purge flow sensor - circuit intermittent
Probable cause = Wiring, poor connection, EVAP canister purge flow sensor, ECM

Trouble code = P0470
Fault location = Exhaust gas pressure sensor - circuit malfunction
Probable cause = Wiring, exhaust gas pressure sensor, ECM

Trouble code = P0471
Fault location = Exhaust gas pressure sensoi' - range/performance problem
Probable cause = Exhaust gas pressure sensor

Trouble code = P0472
Fault location = Exhaust gas pressure sensor - low input
Probable cause = Wiring short to earth, exhaust gas pressure sensor, ECM

Trouble code = P0473
Fault location = Exhaust gas pressure sensor - high input
Probable cause =

Trouble code = P0474
Fault location = Wiring short to positive, exhaust gas pressure sensor, ECM
Probable cause = Wiring, poor connection, exhaust gas pressure sensor, ECM

Trouble code = P0475
Fault location = Exhaust gas pressure control valve - circuit malfunction
Probable cause = Wiring, exhaust gas pressure control valve, ECM

Trouble code = P0476
Fault location = Exhaust gas pressure control valve - range/performance problem
Probable cause = Exhaust gas pressure control valve

Trouble code = P0477
Fault location = Exhaust gas pressure control valve - low input
Probable cause = Wiring short to earth, exhaust gas pressure control valve, ECM

Trouble code = P0478
Fault location = Exhaust gas pressure control valve - high input
Probable cause = Wiring short to positive, exhaust gas pressure control valve, ECM

Trouble code = P0479
Fault location = Exhaust gas pressure control valve - circuit intermittent
Probable cause = Wiring, poor connection, exhaust gas pressure control valve, ECM

Trouble code = P0480
Fault location = Engine coolant blower motor 1 - circuit malfunction
Probable cause = Wiring, engine coolant blower motor, ECM

Trouble code = P0481
Fault location = Engine coolant blower motor 2 - circuit malfunction
Probable cause = Wiring, engine coolant blower motor, ECM

Trouble code = P0482
Fault location = Engine coolant blower motor 3 - circuit malfunction
Probable cause = Wiring, engine coolant blower motor, ECM

Trouble code = P0483
Fault location = Engine coolant blower motor, rationality check - malfunction
Probable cause = Wiring, engine coolant blower motor, ECM

Trouble code = P0484
Fault location = Engine coolant blower motor - circuit over current
Probable cause = Wiring, engine coolant blower motor, ECM

Trouble code = P0485
Fault location = Engine coolant blower motor, power/earth - circuit malfunction
Probable cause = Wiring, engine coolant blower motor, ECM

Trouble code = P0486
Fault location = Exhaust gas recirculation (EGR) valve position sensor B - circuit malfunction
Probable cause = Wiring, poor connection, EGR valve position sensor, ECM

Trouble code = P0487
Fault location = Exhaust gas recirculation (EGR) system, throttle position control - circuit malfunction
Probable cause = Wiring, poor connection, ECM

Trouble code = P0488
Fault location = Exhaust gas recirculation (EGR) system, throttle position control - range/performance
Probable cause = Wiring, poor connection, ECM

Trouble code = P0489
Fault location = Exhaust gas recirculation (EGR) system - circuit low
Probable cause = Wiring short to earth, EGR valve

Trouble code = P0490
Fault location = Exhaust gas recirculation (EGR) system - circuit high
Probable cause = Wiring short to positive, EGR valve

Trouble code = P0491
Fault location = Secondary air injection (AIR) system, bank 1 - malfunction
Probable cause = Wiring, AIR solenoid, hose connections, mechanical fault

Trouble code = P0492
Fault location = Secondary air injection (AIR) system, bank 2 - malfunction
Probable cause = Wiring, AIR solenoid, hose connections, mechanical fault

Trouble code = P0493
Fault location = Engine coolant blower motor over-speed (clutch locked)
Probable cause = Blower motor clutch, mechanical fault

Trouble code = P0494
Fault location = Engine coolant blower motor speed - low
Probable cause = Wiring, relay, blower motor, mechanical fault

Trouble code = P0495
Fault location = Engine coolant blower motor speed - high
Probable cause = Wiring, relay, blower motor, mechanical fault

Trouble code = P0496
Fault location = Evaporative emission (EVAP) system - high purge flow
Probable cause = Wiring, EVAP valve, mechanical fault

Trouble code = P0497
Fault location = Evaporative emission (EVAP) system - low purge flow
Probable cause = Wiring, EVAP valve, hoses blocked, mechanical fault

Trouble code = P0498
Fault location = Evaporative emission (EVAP) system, vent control - circuit low
Probable cause = Wiring short to earth, EVAP valve

Trouble code = P0499
Fault location = Evaporative emission (EVAP) system, vent control - circuit high
Probable cause = Wiring short to positive, EVAP valve

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