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P0609

Overview

Code

P0609

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 P0609 indicates a problem with the ECM's voltage regulation

Symptoms

Check Engine Light; Poor engine power

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 voltage regulator; ECM malfunction

Diagnostic Steps

1 Inspect voltage regulator 2 Test ECM output

Drive Safety Notes

Poor voltage regulation may cause engine instability

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