C0231

Engine Control Module Failure

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$167–556 (est.)

Symptoms

Engine won't start
Power Loss
Unstable idling
Check Engine light comes on

Causes

ECU damage
ECU power problems
Short circuit in wiring harness
ECU software failure
Contact corrosion

How to Fix

Check ECU supply voltage
Inspect the wiring harness for damage
Check ECU connections and contacts
Flash or replace ECU if necessary

Related codes

P0600 P0601 P0602 P0603