Powertrain Codes

P0654

Technical Definition:

Engine RPM Output Circuit

Trouble Code: P0654
Address: 0x0654
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Technical Description:

Possible Causes:

Possible Symptoms:

Engine Speed Output Circuit

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Instrument Cluster
– Instrument Cluster harness is open or shorted
– Instrument Cluster circuit poor electrical connection
– Faulty PCM

Specific Makes:

P0655

Technical Definition:

Engine Hot Lamp Output Control Circuit

Trouble Code: P0655
Address: 0x0655
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Technical Description:

Possible Causes:

Possible Symptoms:

Engine Hot Lamp Output Control Circuit Malfucntion

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

Specific Makes:

P0656

Technical Definition:

Fuel Level Output Circuit

Trouble Code: P0656
Address: 0x0656
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Technical Description:

Possible Causes:

Possible Symptoms:

Fuel Level Output Circuit Malfunction

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Fuel Level Gauge
– Fuel Level Gauge harness is open or shorted
– Fuel Level Gauge circuit poor electrical connection
– Faulty Powertrain Control Module (PCM)

Specific Makes:

P0657

Technical Definition:

Actuator Supply Voltage A Circuit / Open

Trouble Code: P0657
Address: 0x0657
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Technical Description:

Possible Causes:

Possible Symptoms:

Actuator Supply Voltage Circuit open

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Engine Control Module (ECM)
– ECM harness is open or shorted
– ECM circuit poor electrical connection
– ECM Programming

Specific Makes:

P0650

Technical Definition:

Malfunction Indicator Lamp (MIL) Control Circuit

Trouble Code: P0650
Address: 0x0650
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Technical Description:

This diagnostic trouble code (DTC) is set when the vehicle’s Powertrain Control Module detects a fault with the Malfunction Indicator Lamp (MIL) electrical circuit.

Possible Causes:
  • Burned out MIL bulb/LED
  • MIL wiring problem (short or open electrical condition)
  • Poor electrical connection at the bulb/cluster/PCM
  • Failed/faulty PCM

Possible Symptoms:
  • Malfunction indicator lamp NOT illuminating when it should (check engine light or service engine soon light)
  • MIL being illuminated all the time

Malfunction Indicator Lamp Control Circuit Malfunction

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Malfunction Indicator Lamp Bulb
– Malfunction Indicator Lamp Bulb harness is open or shorted
– Malfunction Indicator Lamp Bulb circuit poor electrical connection
– Faulty Engine Control Module (ECM)

Specific Makes: