U302B

Ignition Output Accessory/On/Start

Severity

⚠️ Medium

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$6–56 (est.)

Symptoms

Engine won't start
Problems turning on the ignition
Unstable operation of electrical equipment
Check Engine Light Is On
The car may suddenly stall

Causes

Faulty ignition relay
Blown fuse
Wiring harness damage
Ignition switch malfunction
Problems with the engine control unit

How to Fix

Check and replace fuses
Diagnose the ignition relay
Check wiring integrity
Test the ignition switch
Scan the control unit for other errors

Related codes

U3000 U3003 U302A