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 5701-5800 of 12293 total codes

P16XX Engine Control System

P1644
P1644 indicates a malfunction in the VTEC system, affecting engine performanc...
P1645
DTC P1645 signifies a communication issue between the ECM and TCM.
P1646
P1646 indicates a communication issue within the ECM in certain Honda models.
P1647
P1647 indicates a communication problem between the ECM and throttle control ...
P1648
P1648 indicates an issue with the Vehicle Stability Assist system in specific...
P1649
P1649 indicates a fault in the Engine Control Module's communication or funct...
P164A
P164A indicates a communication issue between the Engine Control Module and o...
P164B
DTC P164B indicates an issue with the engine control module's communication o...
P164C
DTC P164C indicates a communication issue between the ECU and sensors,
P164D
P164D indicates a malfunction related to the engine control module or its sen...
P164E
P164E indicates a throttle actuator control issue detected by the ECM.
P164F
P164F indicates a problem with the ECM's configuration affecting engine perfo...
P1650
P1650 signifies a communication problem with the engine control module,
P1651
P1651 indicates a communication issue within the vehicle's control modules.
P1652
DTC P1652 indicates a malfunction in the Powertrain Control Module,
P1653
P1653 indicates a problem with the throttle actuator control system.
P1654
The P1654 diagnostic trouble code (DTC) indicates a problem with the Engine C...
P1655
P1655 indicates an Engine Control Module fault, affecting performance.
P1656
The P1656 code indicates an issue with the Engine Oil Pressure Sensor Circuit.
P1657
P1657 indicates an issue with the Vehicle Stability Assist system,
P1658
DTC P1658 indicates a communication issue between the PCM and fuel pump relay.
P1659
Indicates a problem within the Vehicle Stability Control (VSC) system,
P165A
DTC P165A indicates a malfunction in the Powertrain Control Module,
P165B
P165B indicates a communication issue in the fuel injection control system.
P165C
P165C indicates a communication failure between the ECM and FPCM,
P165D
P165D indicates a malfunction in the hybrid vehicle control system's communic...
P165E
P165E indicates a problem with the engine control system, specifically relate...
P165F
P165F indicates a problem with the engine cooling system control module.
P1660
The P1660 code indicates a communication malfunction within the vehicle's ECM...
P1661
DTC P1661 indicates an issue with the throttle position sensor or throttle ac...
P1662
P1662 indicates a communication problem between the Engine Control Module and...
P1663
P1663 indicates a communication issue within the Engine Control Module (ECM) ...
P1664
P1664 indicates a communication error between the ECM and TCM.
P1665
The P1665 code indicates a fuel level sensor issue, often found in Honda and ...
P1666
P1666 indicates a communication problem within the vehicle's control modules,...
P1667
P1667 indicates a communication issue between the ECM and other components.
P1668
P1668 indicates a problem with the Powertrain Control Module's communication.
P1669
P1669 indicates a communication error between the engine control module and t...
P166A
DTC P166A refers to a problem with the fuel pump control module,
P166B
P166B indicates a fault in the ECU's communication with the fuel supply system.
P166C
The P166C code indicates an issue with the fuel pump control circuit.
P166D
P166D indicates a malfunction in the engine control module communication,
P166E
DTC P166E indicates a communication error within the engine control system,
P166F
P166F indicates a fuel pump control module issue in Ford and Lincoln vehicles.
P1670
P1670 indicates a communication error between the ECM and other modules in yo...
P1671
P1671 indicates a communication issue within the vehicle’s network.
P1672
The P1672 code indicates a problem with the vehicle's electronic control syst...
P1673
DTC P1673 indicates a fault in the Engine Control Module (ECM) power relay,
P1674
P1674 indicates a communication issue between the ECM and PCM,
P1675
P1675 indicates a communication error with the Powertrain Control Module.
P1676
P1676 indicates a performance issue with the Engine Control Module.
P1677
DTC P1677 signifies a communication issue between the PCM and other vehicle m...
P1678
DTC P1678 indicates a communication error between the engine control module a...
P1679
P1679 refers to a communication error between the PCM and TCM,
P167A
P167A indicates a communication failure between the ECM and PCM.
P167B
DTC P167B signifies a communication error between the PCM and other control m...
P167C
P167C indicates a communication error between the PCM and ECM.
P167D
DTC P167D indicates communication issues between the engine control module an...
P167E
P167E suggests a communication issue with the powertrain control module.
P167F
P167F indicates a communication issue within the vehicle's control modules.
P1680
P1680 indicates a problem with the ignition switch or its circuit.
P1681
P1681 indicates a communication issue with the Powertrain Control Module.
P1682
DTC P1682 indicates a problem with the ignition switch circuit affecting the ...
P1683
DTC P1683 signifies an ignition switch circuit error, leading to potential st...
P1684
P1684 indicates a problem with the ignition switch circuit.
P1685
P1685 indicates a problem with the ignition switch circuit.
P1686
The P1686 code signifies a communication issue between the ignition switch an...
P1687
P1687 indicates a problem with the ignition switch circuit affecting vehicle ...
P1688
P1688 indicates a problem with the ignition switch circuit affecting the ECM.
P1689
P1689 indicates an issue with the ignition switch and its wiring.
P168A
P168A indicates a problem with the ignition switch circuit's performance.
P168B
P168B indicates an issue with the ignition switch circuit, affecting vehicle ...
P168C
P168C indicates an issue with the ignition switch circuit affecting the ECM.
P168D
P168D indicates a malfunction within the ignition switch circuit.
P168E
P168E indicates an issue in the ignition switch circuit, affecting communicat...
P168F
P168F indicates an ignition switch circuit problem.
P1690
P1690 indicates a communication error between the engine and transmission con...
P1691
P1691 indicates a communication error between the Engine Control Module and t...
P1692
P1692 indicates a communication problem between the ECM and TCM.
P1693
P1693 indicates a communication issue between the ECM and TCM.
P1694
P1694 indicates a communication malfunction between the ECM and TCM.
P1695
P1695 indicates a communication fault between the ECM and TCM.
P1696
P1696 indicates a communication issue between the ECM and TCM.
P1697
P1697 indicates a communication error between the PCM and TCM.
P1698
DTC P1698 relates to a communication issue between the ECM and TCM,
P1699
P1699 indicates a communication issue between control modules in select Chrys...
P169A
P169A indicates a communication issue between the ECM and TCM.
P169B
P169B indicates a communication error between the ECM and TCM.
P169C
P169C indicates a communication issue between the ECM and TCM.
P169D
The P169D code indicates a communication error between the PCM and ECM in som...
P169E
The P169E diagnostic trouble code (DTC) is an error that signifies a problem ...
P169F
P169F indicates a communication error between the ECM and other modules in yo...
P16A0
The P16A0 code indicates a fault with the Engine Control Module's hybrid batt...
P16A1
The P16A1 code indicates a fault in the hybrid battery management system of H...
P16A2
The P16A2 code indicates a malfunction in the Hybrid Powertrain Control Modul...
P16A3
P16A3 indicates a problem with the hybrid vehicle battery pack cooling fan co...
P16A4
The P16A4 code indicates a problem with the hybrid battery pack voltage senso...
P16A5
The P16A5 code indicates a malfunction in the hybrid battery management syste...
P16A6
P16A6 indicates a malfunction with the hybrid battery pack voltage sensor.
P16A7
The P16A7 code indicates a malfunction in the hybrid control unit,
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