p1651 pcm output controls fault

P1651 PCM Output Controls Fault

Code: P1651
Description: PCM Output Controls Fault
Definition: This code indicates a fault in the Powertrain Control Module (PCM) related to its ability to control output devices. The PCM is responsible for managing various engine and transmission functions, and this code suggests there may be an issue with how it sends signals to these components.

P1651 – PCM Output Controls Fault

Typical severity: Moderate

Common Causes

P1651 – PCM Output Controls Fault

Common causes:

Common Misdiagnosis

OBD2 Code: P1651 – PCM Output Controls Fault

Description: This code indicates a problem with the Powertrain Control Module (PCM) output controls.

Common Misdiagnosis: Replacing the PCM without checking for wiring issues or faulty sensors that may be causing incorrect signals to the PCM.

Common Diagnostic Steps

OBD2 Code: P1651 – PCM Output Controls Fault

Description: This code indicates a fault in the Powertrain Control Module (PCM) related to output controls.

Check for any additional trouble codes that may be present. These can provide more context or indicate related issues.
Inspect all wiring and connectors associated with the PCM for signs of damage, corrosion, or disconnection.
Test the voltage and ground signals at the PCM to ensure they are within specifications.
Verify that all sensors and actuators controlled by the PCM are functioning correctly. This includes checking their resistance values and ensuring they receive proper power supply.
If equipped, use a scan tool to monitor live data from the PCM outputs to identify any irregularities in operation.
Perform a continuity test on circuits connected to the affected output controls to check for open or shorted conditions.
If no faults are found in wiring or components, consider reprogramming or replacing the PCM as a last resort after confirming it is defective.