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P0508

Overview

Code

P0508

Code Type

P

Code Class

P0

System

Idle Control

Severity Level

Medium

Emissions Related

true

Drivability Impact

Minor

Diagnostic Protocol

OBD2

Freeze Frame Useful

true

Code Definition

Diagnostic trouble code P0508 indicates a malfunction in the idle air control valve circuit

Symptoms

Poor idle; 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

Idle air control valve circuit

Possible Causes

Wiring fault; Failed IAC valve

Diagnostic Steps

1 Inspect IAC wiring 2 Test IAC operation

Drive Safety Notes

Emissions increased

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