Electrical Codes

VIN Not Programmed or Incompatible - ECM/PCM

The vehicle identification number (VIN) is not programmed into the ECM, or does not match the vehicle.

Control Module Programming Error

The ECM has detected an error in its programmed calibration data.

Internal Control Module Keep Alive Memory Error

The ECM's keep-alive memory (KAM), which stores learned values like fuel trims, has failed.

Internal Control Module Random Access Memory Error

The ECM's RAM has failed an internal self-test.

Internal Control Module Read Only Memory Error

The ECM's ROM has failed an internal self-test.

Control Module Performance

The ECM has detected an internal performance fault not matching a specific memory error.

PCM Processor Fault

The ECM/PCM has detected an internal processor or memory fault within its own control module, indicating the module itself may be malfunctioning rather than an external sensor or circuit.

System Voltage Circuit Malfunction

The ECM has detected that system voltage (from the battery/charging system) is outside the normal operating range, which can affect the accuracy of multiple sensors and modules that rely on stable reference voltage.

Internal Control Module Memory Check Sum Error

The ECM's internal memory has failed a checksum self-test, indicating corrupted programming.

Engine RPM Output Circuit Malfunction

The circuit that sends engine RPM signal output to the instrument cluster or other modules has a fault.

Lost Communication With Radio

The vehicle's main network has lost communication with the radio/infotainment module.

Lost Communication With Digital Radio Receiver Module

The vehicle's main network has lost communication with the digital (satellite/HD) radio receiver module.

Cruise Control/Brake Switch A Circuit

Fault in the brake switch circuit that deactivates cruise control. The brake signal is used to disengage cruise when brakes are applied.

Cruise Control Multi-Function Input A Circuit

Fault in the cruise control input circuit. The ECU is not receiving valid signals from cruise control switches.

Malfunction Indicator Lamp Control Circuit Malfunction

The circuit that controls the check engine light itself has a fault.

Generator Lamp Control Circuit Malfunction

The circuit that controls the charging system warning lamp on the dashboard has a fault.

Invalid Data Received From ECM/PCM

Another module on the network has received invalid or corrupted data from the ECM/PCM.

System Voltage High

Battery/system voltage is above normal threshold.

Generator Control Circuit Malfunction

The alternator (generator) control circuit, used by the ECM to regulate charging output, has a fault.

Generator Field Terminal Circuit Malfunction

The alternator field terminal circuit, which controls the alternator's output regulation, has a fault.

Lost Communication With Actuator/Solenoid Driver Module A

The vehicle's main network has lost communication with a body actuator/solenoid driver module.

Lost Communication With Actuator/Solenoid Driver Module B

The vehicle's main network has lost communication with a second body actuator/solenoid driver module.

Internal Control Module Software Incompatibility

A control module has detected that its software version is incompatible with other modules on the network.

System Voltage Low

Battery/system voltage is below the expected threshold. The ECM has detected low voltage.