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P0656

Overview

Code

P0656

Code Type

P

Code Class

P0

System

Engine

Severity Level

High

Emissions Related

false

Drivability Impact

Major

Diagnostic Protocol

OBD2

Freeze Frame Useful

true

Code Definition

Diagnostic trouble code P0656 indicates an issue with the engine control module (ECM) wiring

Symptoms

Poor engine performance Check Engine Light

Overview applies to this diagnostic code.

Affected Systems

On This Page

  • Code Definition

  • Symptoms

  • Affected Systems

  • Possible Causes

  • Diagnostic Steps

  • Drive Safety Notes​

More Resources

Engine Control Module (ECM)

Possible Causes

Faulty wiring Corroded connectors

Diagnostic Steps

1 Inspect ECM wiring 2 Test continuity

Drive Safety Notes

Wiring faults can lead to poor engine control and performance

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