P0508

Idle Air Control System Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Unstable idle
Engine stalling at idle
Floating speed
Difficulty starting

Causes

Idle air control (IAC) malfunction
Open or short circuit in control circuit
Oxidation of contacts in connectors
Wiring Harness Problems
ECU malfunction (rare)

How to Fix

Check the integrity of the idle air control circuit
Inspect connectors and contacts for oxidation
Test the idle air control
If necessary, replace the IAC or repair the wiring harness.
Reset the error and check engine operation

Related codes

P0507 P0506 P0510