Computer and Output Circuits

P0600

The P0600 code indicates a malfunction in the serial communication link between the engine control module...

P0601

The P0601 code indicates that the Engine Control Module (ECM) has detected an internal memory checksum error,...

P0602

The P0602 code indicates that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected...

P0603

The P0603 code indicates that the Engine Control Module (ECM) has detected an internal error in its Keep...

P0604

The P0604 code indicates that the Powertrain Control Module (PCM) has detected an internal random access...

P0605

The P0605 code indicates that the Engine Control Module (ECM) has detected an internal fault in its Read Only...

P0606

The P0606 code indicates an internal fault within the Powertrain Control Module (PCM), often due to a...

P0607

The P0607 code indicates that the powertrain control module (PCM) has detected an internal performance fault,...

P0608

The P0608 code indicates a malfunction in the Vehicle Speed Sensor (VSS) output circuit 'A' within the...

P0609

The P0609 code indicates that the powertrain control module (PCM) has detected a malfunction in the vehicle...

P060A

Code P060A indicates that the Engine Control Module (ECM) has detected an internal performance issue with its...

P060B

Code P060B indicates that the powertrain control module (PCM) has detected an internal performance fault in...

P060C

The P060C code indicates that the Engine Control Module (ECM) has detected an internal performance issue with...

P060D

The P060D code indicates that the Engine Control Module (ECM) has detected a performance problem with the...

P060E

The P060E code indicates that the Engine Control Module (ECM) has detected a performance issue with the...

P060F

The P060F code indicates that the Engine Control Module (ECM) has detected an internal performance issue with...

P0610

The P0610 code indicates that the powertrain control module (PCM) has detected an internal error related to...

P0611

The P0611 code indicates a performance problem with the fuel injector control module (FICM), which manages...

P0612

The P0612 code indicates a fault in the fuel injector control module relay circuit. This relay supplies power...

P0613

The P0613 code indicates an internal processor malfunction within the Transmission Control Module (TCM). This...

P0614

The P0614 code indicates a communication mismatch between the Engine Control Module (ECM) and the...

P0615

The P0615 code indicates a fault in the starter relay circuit, which is responsible for sending battery...

P0616

The P0616 code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the...

P0617

The P0617 code indicates that the Powertrain Control Module (PCM) has detected a voltage higher than the...

P0618

The P0618 code indicates a Keep Alive Memory (KAM) error in the Alternative Fuel Control Module. This module...

P0619

The P0619 code indicates an internal memory error (RAM/ROM) within the Alternative Fuel Control Module...

P061A

P061A indicates that the Engine Control Module (ECM) has detected an internal performance issue with the...

P061B

This diagnostic trouble code (DTC) indicates that the engine control module (ECM) has detected an internal...

P061C

The P061C code indicates that the Engine Control Module (ECM) has detected an internal performance issue with...

P061D

The P061D code indicates that the Engine Control Module (ECM) has detected an internal performance issue...

P061E

The P061E code indicates that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected...

P061F

Code P061F indicates that the Engine Control Module (ECM) has detected a performance problem within the...

P0620

The P0620 code indicates a malfunction in the generator (alternator) control circuit. This circuit is...

P0621

The P0621 code indicates a malfunction in the generator (alternator) lamp 'L' control circuit. This circuit...

P0622

The P0622 code indicates a malfunction in the generator field 'F' control circuit, which is responsible for...

P0623

The P0623 code indicates a fault in the generator lamp control circuit, which is responsible for controlling...

P0624

The P0624 code indicates a fault in the fuel cap lamp control circuit. This circuit is responsible for...

P0625

The P0625 code indicates that the powertrain control module (PCM) has detected a low voltage condition in the...

P0626

Code P0626 indicates that the powertrain control module (PCM) has detected a voltage higher than expected on...

P0627

The P0627 code indicates an open or malfunction in the fuel pump control circuit. The powertrain control...

P0628

The P0628 code indicates that the powertrain control module (PCM) has detected a low voltage condition in the...

P0629

Code P0629 indicates that the PCM has detected a high voltage condition in the fuel pump control circuit....

P062A

The P062A code indicates that the Engine Control Module (ECM) has detected a malfunction in the fuel pump...

P062B

The P062B code indicates that the Engine Control Module (ECM) has detected a performance issue within its...

P062C

Code P062C indicates that the Engine Control Module (ECM) has detected an internal performance issue with the...

P062D

The P062D code indicates a performance issue in the fuel injector driver circuit for Bank 1. This circuit...

P062E

The P062E code indicates a performance issue in the fuel injector driver circuit for Bank 2 (the side of the...

P062F

The P062F code indicates that the Engine Control Module (ECM) or another control module has detected an...

P0630

The P0630 code indicates that the Vehicle Identification Number (VIN) has not been programmed into the Engine...

P0631

The P0631 code indicates that the Transmission Control Module (TCM) has not been programmed with a Vehicle...

P0632

The P0632 code indicates that the odometer reading has not been programmed into the Engine Control Module...

P0633

The P0633 code indicates that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has not been...

P0634

The P0634 code indicates that the Powertrain Control Module (PCM), Engine Control Module (ECM), or...

P0635

The P0635 code indicates a fault in the power steering control circuit, which can affect the electric power...

P0636

The P0636 code indicates that the Power Steering Control Module (PSCM) has detected a low voltage condition...

P0637

The P0637 code indicates that the Power Steering Control Module (PSCM) has detected a voltage signal from the...

P0638

The P0638 code indicates that the Powertrain Control Module (PCM) has detected a malfunction in the throttle...

P0639

Code P0639 indicates that the Powertrain Control Module (PCM) has detected a malfunction in the throttle...

P063A

The P063A code indicates a problem in the generator voltage sense circuit, which monitors the alternator's...

P063B

The P063B code indicates that the Powertrain Control Module (PCM) has detected a voltage signal from the...

P063C

The P063C code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition on the...

P063D

The P063D code indicates that the powertrain control module (PCM) has detected a voltage signal from the...

P063E

The P063E code indicates that the Engine Control Module (ECM) has detected a missing or invalid throttle...

P063F

The P063F code indicates that the Powertrain Control Module (PCM) has detected a missing or invalid signal...

P0640

The P0640 code indicates a malfunction in the intake air heater control circuit. This heater is used in...

P0641

The P0641 code indicates that the Engine Control Module (ECM) has detected an open circuit in the 5-volt...

P0642

The P0642 code indicates that the Engine Control Module (ECM) has detected a low voltage condition on the...

P0643

The P0643 code indicates that the Engine Control Module (ECM) has detected a voltage higher than the...

P0644

The P0644 code indicates a fault in the serial communication circuit between the instrument cluster (driver...

P0645

The P0645 code indicates a fault in the A/C clutch relay control circuit. The Powertrain Control Module (PCM)...

P0646

The P0646 code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the...

P0647

The P0647 code indicates that the Powertrain Control Module (PCM) has detected a high voltage condition in...

P0648

The P0648 code indicates a fault in the immobilizer lamp control circuit. This circuit is responsible for...

P0649

The P0649 code indicates a malfunction in the speed control lamp control circuit. This circuit is responsible...

P064A

The P064A code indicates a malfunction in the Fuel Pump Control Module, which manages the fuel pump's...

P064B

The P064B code indicates a malfunction in the Power Take-Off (PTO) control module circuit. The PTO is an...

P064C

The P064C code indicates a malfunction in the glow plug control module, which manages the glow plugs in...

P064D

Code P064D indicates that the Engine Control Module (ECM) has detected a performance fault within its...

P064E

The P064E code indicates that the Engine Control Module (ECM) has detected a performance issue with the...

P064F

The P064F code indicates that the Engine Control Module (ECM) has detected unauthorized software or...

P0650

The P0650 code indicates a malfunction in the control circuit of the Malfunction Indicator Lamp (MIL),...

P0651

The P0651 code indicates that the Engine Control Module (ECM) has detected an open circuit in the 5-volt...

P0652

The P0652 code indicates that the Engine Control Module (ECM) has detected a low voltage condition on the...

P0653

The P0653 code indicates that the Engine Control Module (ECM) has detected a voltage higher than the...

P0654

The P0654 code indicates a malfunction in the engine RPM output circuit, which is responsible for sending the...

P0655

The P0655 code indicates a malfunction in the circuit that controls the engine hot warning lamp. This lamp is...

P0656

The P0656 code indicates a malfunction in the fuel level output circuit, which is responsible for sending the...

P0657

The P0657 code indicates that the Powertrain Control Module (PCM) has detected an open or short circuit in...

P0658

The P0658 code indicates that the powertrain control module (PCM) has detected a low voltage condition on the...

P0659

The P0659 code indicates that the Powertrain Control Module (PCM) has detected a voltage level in the...

P065A

The P065A code indicates that the powertrain control module (PCM) has detected a performance issue with the...

P065B

The P065B code indicates that the powertrain control module (PCM) has detected a malfunction in the generator...

P065C

The P065C code indicates that the powertrain control module (PCM) has detected a mechanical performance...

P065D

The P065D code indicates a malfunction in the control circuit for the reductant system malfunction lamp,...

P065E

The P065E code indicates that the Engine Control Module (ECM) has detected a performance issue with the...

P065F

The P065F code indicates that the Powertrain Control Module (PCM) has detected a performance issue with the...

P0660

The P0660 code indicates a fault in the intake manifold tuning valve control circuit for bank 1. This valve...

P0661

The P0661 code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the...

P0662

The P0662 code indicates that the Powertrain Control Module (PCM) has detected a high voltage condition in...

P0663

Code P0663 indicates a fault in the control circuit of the intake manifold tuning valve for Bank 2. This...

P0664

The P0664 code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the...

P0665

The P0665 code indicates that the Powertrain Control Module (PCM) has detected a high voltage condition in...

P0666

The P0666 code indicates a fault in the internal temperature sensor circuit of the Powertrain Control Module...

P0667

The P0667 code indicates that the powertrain control module (PCM), engine control module (ECM), or...

P0668

The P0668 code indicates that the powertrain control module (PCM), engine control module (ECM), or...

P0669

The P0669 code indicates that the Powertrain Control Module (PCM), Engine Control Module (ECM), or...

P066A

The P066A code indicates that the powertrain control module (PCM) has detected a low voltage condition in the...

P066B

The P066B code indicates that the powertrain control module (PCM) has detected a high voltage condition in...

P066C

The P066C code indicates that the engine control module (ECM) has detected a low voltage condition in the...

P066D

The P066D code indicates that the powertrain control module (PCM) has detected a high voltage condition in...

P066E

The P066E code indicates that the powertrain control module (PCM) has detected a low voltage condition in the...

P066F

The P066F code indicates that the powertrain control module (PCM) has detected a high voltage condition in...

P0670

The P0670 code indicates a fault in the glow plug module control circuit, which is responsible for managing...

P0671

The P0671 code indicates a fault in the glow plug circuit for cylinder 1. Glow plugs are used in diesel...

P0672

The P0672 code indicates a malfunction in the glow plug circuit for cylinder #2. Glow plugs are used in...

P0673

The P0673 code indicates a fault in the glow plug circuit for cylinder 3. Glow plugs are used in diesel...

P0674

The P0674 code indicates a fault in the glow plug circuit for cylinder 4 in a diesel engine. The glow plug is...

P0675

The P0675 code indicates a fault in the glow plug circuit for cylinder 5. Glow plugs are used in diesel...

P0676

The P0676 code indicates a malfunction in the glow plug circuit for cylinder #6. Glow plugs are used in...

P0677

The P0677 code indicates a malfunction in the glow plug circuit for cylinder #7. Glow plugs are used in...

P0678

The P0678 code indicates a fault in the glow plug circuit for cylinder 8. Glow plugs are used in diesel...

P0679

The P0679 code indicates a fault in the glow plug circuit for cylinder 9. This circuit includes the glow plug...

P067A

The P067A code indicates that the powertrain control module (PCM) has detected a low voltage condition in the...

P067B

The P067B code indicates that the engine control module (ECM) has detected a high voltage condition in the...

P067C

The P067C code indicates that the powertrain control module (PCM) has detected a low voltage condition in the...

P067D

The P067D code indicates that the powertrain control module (PCM) has detected a high voltage condition in...

P067E

The P067E code indicates that the powertrain control module (PCM) has detected a low voltage condition in the...

P067F

The P067F code indicates that the powertrain control module (PCM) has detected a high voltage condition in...

P0680

The P0680 code indicates a fault in the glow plug circuit for cylinder 10. This circuit includes the glow...

P0681

The P0681 code indicates a problem in the glow plug circuit for cylinder 11, typically found in diesel...

P0682

The P0682 code indicates a fault in the glow plug circuit for cylinder 12. Glow plugs are used in diesel...

P0683

The P0683 code indicates a communication fault between the glow plug control module and the engine control...

P0684

The P0684 code indicates a communication issue between the glow plug control module and the powertrain...

P0685

The P0685 code indicates that the powertrain control module (PCM) has detected an open circuit in the control...

P0686

The P0686 code indicates that the powertrain control module (PCM) has detected a low voltage condition on the...

P0687

The P0687 code indicates that the Powertrain Control Module (PCM) has detected a high voltage condition on...

P0688

The P0688 code indicates that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected...

P0689

The P0689 code indicates that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected...

P068A

The P068A code indicates that the ECM/PCM power relay de-energized before the engine control module completed...

P068B

The P068B code indicates that the powertrain control module (PCM) detected the main power relay de-energized...

P068C

The P068C code indicates that the powertrain control module (PCM) has detected a low voltage condition in the...

P068D

The P068D code indicates that the powertrain control module (PCM) has detected a high voltage condition in...

P068E

The P068E code indicates that the powertrain control module (PCM) has detected a low voltage condition in the...

P068F

The P068F code indicates that the powertrain control module (PCM) has detected a high voltage condition in...

P0690

The P0690 code indicates that the Engine Control Module (ECM) or Powertrain Control Module (PCM) has detected...

P0691

The P0691 code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the...

P0692

The P0692 code indicates that the Powertrain Control Module (PCM) has detected a high voltage condition in...

P0693

The P0693 code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the...

P0694

The P0694 code indicates that the Powertrain Control Module (PCM) has detected a high voltage condition in...

P0695

The P0695 code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the...

P0696

The P0696 code indicates that the Powertrain Control Module (PCM) has detected a high voltage condition in...

P0697

The P0697 code indicates an open circuit in the sensor reference voltage circuit, typically a 5-volt...

P0698

The P0698 code indicates that the Engine Control Module (ECM) has detected a low voltage condition on the...

P0699

The P0699 code indicates that the Engine Control Module (ECM) has detected a voltage higher than the...

P069A

The P069A code indicates that the powertrain control module (PCM) has detected a low voltage condition in the...

P069B

The P069B code indicates that the powertrain control module (PCM) has detected a high voltage condition in...

P069C

The P069C code indicates that the powertrain control module (PCM) has detected a low voltage condition in the...

P069D

The P069D code indicates that the powertrain control module (PCM) has detected a high voltage condition in...

P069E

The P069E code indicates that the fuel pump control module (FPCM) has detected a fault and requested the...

P069F

The P069F code indicates a problem in the throttle actuator control (TAC) lamp circuit. This circuit is...

P06A0

The P06A0 code indicates a fault in the variable displacement A/C compressor control circuit. This circuit...

P06A1

The P06A1 code indicates that the Powertrain Control Module (PCM) has detected a low voltage condition in the...

P06A2

The P06A2 code indicates that the Powertrain Control Module (PCM) has detected a high voltage condition in...

P06A3

The P06A3 code indicates that the Engine Control Module (ECM) has detected an open circuit in the 5-volt...

P06A4

The P06A4 code indicates that the Engine Control Module (ECM) has detected a low voltage condition on the...

P06A5

The P06A5 code indicates that the Engine Control Module (ECM) has detected a voltage higher than the...

P06A6

The P06A6 code indicates that the Engine Control Module (ECM) has detected a voltage level in the sensor...

P06A7

The P06A7 code indicates that the Engine Control Module (ECM) has detected a voltage out of the expected...

P06A8

Code P06A8 indicates that the Engine Control Module (ECM) has detected a voltage in the sensor reference...

P06A9

The P06A9 code indicates that the Engine Control Module (ECM) has detected a voltage in the sensor reference...

P06AA

The P06AA code indicates that the powertrain control module (PCM), engine control module (ECM), or...

P06AB

The P06AB code indicates a problem with the internal temperature sensor circuit within the Powertrain Control...

P06AC

The P06AC code indicates that the internal temperature sensor within the PCM, ECM, or TCM is reporting a...

P06AD

The P06AD code indicates that the powertrain control module (PCM), engine control module (ECM), or...

P06AE

The P06AE code indicates that the powertrain control module (PCM), engine control module (ECM), or...

P06AF

The P06AF code indicates that the Powertrain Control Module (PCM) has detected a fault in the torque...

P06B0

The P06B0 code indicates a fault in the sensor power supply circuit, specifically an open circuit condition....

P06B1

The P06B1 code indicates that the Engine Control Module (ECM) has detected a low voltage condition on the...

P06B2

The P06B2 code indicates that the Engine Control Module (ECM) has detected a voltage higher than the...

P06B3

The P06B3 code indicates an open circuit in the sensor power supply, meaning the 5V reference voltage from...

P06B4

The P06B4 code indicates that the Engine Control Module (ECM) has detected a low voltage condition on the...

P06B5

The P06B5 code indicates that the Engine Control Module (ECM) has detected a voltage higher than the...

P06B6

The P06B6 code indicates that the Engine Control Module (ECM) has detected a performance problem with the...

P06B7

The P06B7 code indicates that the Engine Control Module (ECM) has detected a performance fault within the...

P06B8

The P06B8 code indicates an internal error in the engine control module's non-volatile random access memory...

P06B9

The P06B9 code indicates that the glow plug circuit for cylinder 1 is operating outside its expected...

P06BA

The P06BA code indicates that the engine control module (ECM) has detected a malfunction in the glow plug...

P06BB

The P06BB code indicates that the powertrain control module (PCM) has detected a malfunction in the glow plug...

P06BC

The P06BC code indicates that the engine control module (ECM) has detected a performance or range issue in...

P06BD

The P06BD code indicates that the powertrain control module (PCM) has detected a malfunction in the glow plug...

P06BE

The P06BE code indicates that the Engine Control Module (ECM) has detected a malfunction in the glow plug...

P06BF

The P06BF code indicates that the engine control module (ECM) has detected a malfunction in the glow plug...

P06C0

The P06C0 code indicates that the Engine Control Module (ECM) has detected a performance or range issue in...

P06C1

The P06C1 code indicates that the Engine Control Module (ECM) has detected a performance or range issue in...

P06C2

The P06C2 code indicates that the Engine Control Module (ECM) has detected a performance or range issue in...

P06C3

The P06C3 code indicates that the Engine Control Module (ECM) has detected a performance or range issue in...

P06C4

The P06C4 code indicates that the glow plug circuit for cylinder 12 is operating outside its expected...

P06C5

The P06C5 code indicates a problem with the glow plug circuit for cylinder 1 in a diesel engine. The glow...

P06C6

The P06C6 code indicates that the engine control module (ECM) has detected an incorrect or malfunctioning...

P06C7

The P06C7 code indicates that the Engine Control Module (ECM) has detected an incorrect glow plug in cylinder...

P06C8

The P06C8 code indicates that the Engine Control Module (ECM) has detected a fault with the glow plug in...

P06C9

The P06C9 code indicates that the Engine Control Module (ECM) has detected an incorrect glow plug in cylinder...

P06CA

The P06CA code indicates that the Engine Control Module (ECM) has detected an incorrect or malfunctioning...

P06CB

The P06CB code indicates that the engine control module (ECM) has detected an incorrect or malfunctioning...

P06CC

The P06CC code indicates that the glow plug in cylinder 8 is not operating within the expected parameters....

P06CD

The P06CD code indicates that the engine control module (ECM) has detected an incorrect glow plug in cylinder...

P06CE

The P06CE code indicates that the Engine Control Module (ECM) has detected an incorrect glow plug in cylinder...

P06CF

The P06CF code indicates that the glow plug for cylinder 11 is not operating correctly. Glow plugs are used...

P06D0

The P06D0 code indicates a problem with the glow plug circuit for cylinder 12 in a diesel engine. Glow plugs...

P06D1

The P06D1 code indicates that the Engine Control Module (ECM) has detected a performance problem with the...