B0238

Air Flow Control 1 Circuit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–111 (est.)

Symptoms

Unstable idle
Reduced engine power
Increased fuel consumption
Check Engine Light Is On

Causes

Open or short circuit in the control circuit wiring harness
Oxidation of connector contacts
Faulty solenoid valve (solenoid)
Problems with the engine control unit

How to Fix

Check the wiring harness for damage and reliability of connections.
Clean connector contacts from oxides
Check the solenoid resistance and functionality
Scan the control unit for related errors
Replace faulty components if necessary

Related codes

P0171 P0172 P0101 P0102