U300C

Ignition Input Off/On/Start

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$6–56 (est.)

Symptoms

Engine won't start
Problems starting the engine
No power on some systems
Check Engine Light Is On
Incorrect operation of electronic systems

Causes

Open or short circuit in the ignition circuit
Poor contact in connectors
Control module malfunction
Problems with the ignition switch
Contact corrosion

How to Fix

Check the integrity of the ignition circuit
Inspect and clean connector contacts
Check voltage on ignition circuit
Test the ignition switch
If necessary, replace the control module

Related codes

U3000 U3001 U3002