Engine Diagnostic Codes (P0XXX)

Complete list of engine diagnostic trouble codes (P0XXX). Browse powertrain codes for engine, transmission, and emission control systems.

Popular Engine Codes

P0100

Mass Air Flow Circuit

Mass or Volume Air Flow Circuit malfunction

P0171

System Too Lean (Bank 1)

System too Lean (Bank 1)

P0300

Random/Multiple Cylinder Misfire

Random/Multiple Cylinder Misfire Detected

P0420

Catalyst System Efficiency

Catalyst System Efficiency Below Threshold (Bank 1)

P0442

EVAP System Leak

Evaporative Emission Control System Leak Detected (small leak)

Complete Engine Codes Index

Browse all available engine diagnostic trouble codes (P0XXX) organized by system:

Showing codes 1601-1700 of 4123 total codes

P06XX Engine Control System

P0640
P0640 indicates a problem with the sensor reference voltage circuit,
P0641
P0641 indicates a fault in the sensor reference voltage circuit.
P0642
P0642 indicates a problem with the sensor reference voltage in your vehicle.
P0643
P0643 indicates a malfunction in the PCM sensor reference voltage,
P0644
P0644 indicates a problem with the reference voltage circuit in your vehicle'...
P0645
P0645 indicates a fault in the sensor reference voltage A circuit,
P0646
P0646 indicates a problem with the sensor reference voltage circuit,
P0647
P0647 indicates a potential issue with the power supply to the PCM,
P0648
P0648 indicates a problem with the PCM's power supply, affecting engine perfo...
P0649
DTC P0649 indicates a power input signal issue to the PCM, affecting engine p...
P064A
P064A signifies a power input signal performance issue in the PCM.
P064B
P064B indicates a problem with the powertrain control module's voltage refere...
P064C
DTC P064C indicates a voltage reference issue in the PCM circuit.
P064D
DTC P064D indicates a malfunction in the PCM's reference voltage to sensor ci...
P064E
The P064E code indicates a voltage issue in the sensor reference circuit,
P064F
The P064F code indicates a powertrain control module issue with sensor refere...
P0650
P0650 means there's an issue with the Malfunction Indicator Lamp circuit.
P0651
DTC P0651 indicates a malfunction in the sensor reference voltage circuit,
P0652
P0652 indicates a problem with the Sensor Reference Voltage 'B' circuit.
P0653
P0653 indicates a problem with the sensor reference voltage circuit in your v...
P0654
DTC P0654 indicates a low voltage in the sensor reference voltage circuit 'A'.
P0655
DTC P0655 indicates a malfunction in the ECM's sensor reference voltage circuit.
P0656
P0656 indicates a power supply issue in the ECM circuit.
P0657
P0657 indicates a fault in the Sensor Reference Voltage 'A' circuit.
P0658
P0658 indicates a problem with the throttle actuator control circuit.
P0659
P0659 indicates a fault in the sensor reference voltage circuit A.
P065A
DTC P065A refers to an issue with the Sensor Reference Voltage A circuit.
P065B
DTC P065B indicates a malfunction in the performance problem indicator circui...
P065C
P065C indicates a performance problem with the powertrain control module.
P065D
The P065D code indicates a low voltage condition in the sensor reference volt...
P065E
P065E indicates a problem with a sensor's performance in your vehicle's PCM.
P065F
P065F indicates a power output error from the ECM, affecting various vehicle ...
P0660
P0660 indicates a malfunction in the intake manifold tuning valve control cir...
P0661
P0661 relates to a malfunction in the intake manifold runner control circuit.
P0662
P0662 indicates a low voltage issue in the intake manifold runner control cir...
P0663
The P0663 code indicates a malfunction in the intake manifold tuning valve co...
P0664
P0664 indicates a malfunction in the intake manifold tuning valve control cir...
P0665
DTC P0665 indicates a fault in the intake manifold tuning valve control circuit.
P0666
DTC P0666 indicates a problem with the intake manifold tuning valve's perform...
P0667
P0667 indicates a low voltage issue in the intake manifold tuning valve contr...
P0668
P0668 indicates a malfunction in the intake manifold tuning valve control cir...
P0669
P0669 indicates a performance issue with the intake manifold tuning valve's c...
P066A
The P066A code indicates a problem with the intake manifold tuning valve cont...
P066B
P066B indicates a performance issue with the intake manifold runner control s...
P066C
P066C indicates a malfunction in the intake manifold tuning valve control cir...
P066D
P066D indicates a problem with the intake manifold runner control system that...
P066E
P066E indicates a performance issue with the intake manifold tuning valve.
P066F
DTC P066F signifies a performance issue with the Engine Control Module relate...
P0670
The P0670 code indicates a malfunction in the glow plug circuit for cylinder ...
P0671
P0671 indicates a malfunction in the glow plug circuit for cylinder 1,
P0672
P0672 indicates a high input from the glow plug circuit for cylinder 2 in die...
P0673
P0673 indicates a high voltage condition in the glow plug circuit for cylinde...
P0674
P0674 indicates a high input signal from the glow plug circuit for glow plug ...
P0675
P0675 indicates a problem with the glow plug heater circuit for cylinder 5.
P0676
P0676 refers to a malfunction in the glow plug circuit, impacting diesel engi...
P0677
P0677 indicates a problem with the glow plug heater circuit for cylinder 7,
P0678
P0678 indicates a high input voltage in the glow plug circuit for cylinder 8,...
P0679
P0679 indicates a malfunction in the glow plug circuit for cylinder 9.
P067A
The P067A code indicates a malfunction in the glow plug control circuit of a ...
P067B
P067B signals a problem with the glow plug circuit, affecting diesel engine s...
P067C
P067C indicates a problem with the glow plug control circuit in diesel engines.
P067D
Indicates a problem with the glow plug control module, which is essential for...
P067E
DTC P067E signifies a malfunction with the glow plug system in diesel engines.
P067F
P067F indicates a malfunction in the glow plug circuit, affecting diesel engi...
P0680
The P0680 code indicates a problem with the engine control module's power rel...
P0681
P0681 indicates a problem with the Engine Control Module power relay circuit.
P0682
DTC P0682 indicates a malfunction in the ECM power relay circuit.
P0683
P0683 signifies a problem with the Engine Control Module power relay,
P0684
P0684 is a trouble code indicating an issue with the engine control module po...
P0685
P0685 indicates an issue with the PCM relay control circuit, affecting engine...
P0686
DTC P0686 signifies a malfunction in the power relay circuit serving the ECM/...
P0687
Indicates a problem with the power relay circuit of the Engine Control Module...
P0688
DTC P0688 indicates an issue with the ECM power relay circuit,
P0689
P0689 indicates a problem with the PCM power relay control circuit,
P068A
P068A indicates an issue with the power relay circuit for the ECM,
P068B
P068B indicates a malfunction in the ignition relay control circuit within th...
P068C
Indicates the Powertrain Control Module (PCM) has detected a problem with the...
P068D
P068D indicates a problem with the powertrain control module's internal power...
P068E
DTC P068E indicates a problem with the Engine Control Module's power supply.
P068F
The P068F code refers to a performance issue with the Engine Control Module (...
P0690
DTC P0690 indicates a problem with the power supply to the PCM,
P0691
DTC P0691 indicates an issue with the engine cooling fan control circuit,
P0692
The P0692 code indicates a problem with the engine coolant temperature sensor...
P0693
P0693 indicates a malfunction in the engine coolant temperature sensor circuit.
P0694
DTC P0694 signifies a power supply issue between the ECM and PCM,
P0695
P0695 indicates a malfunction in the ECM power relay circuit.
P0696
P0696 indicates a malfunction in the engine cooling fan control circuit,
P0697
DTC P0697 indicates an issue with the engine coolant temperature sensor circuit.
P0698
DTC P0698 indicates a high voltage condition in the engine cooling fan contro...
P0699
P0699 indicates an issue with the Engine Control Module's performance.
P069A
P069A indicates a cooling fan control circuit performance issue.
P069B
P069B indicates a malfunction in the cooling fan control circuit,
P069C
DTC P069C signals a communication issue between the PCM and coolant temperatu...
P069D
The P069D code indicates an issue with the fuel pump control module's perform...
P069E
P069E indicates a cooling performance issue with the engine control module.
P069F
P069F indicates a problem with the fuel pump control module's performance.
P06A0
P06A0 indicates a problem with the engine oil pressure control circuit perfor...
P06A1
The P06A1 code indicates a problem with the engine oil pressure sensor or cir...
P06A2
P06A2 relates to engine oil pressure control issues in your vehicle.
P06A3
P06A3 signifies an issue with the engine oil pressure control circuit,
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