U300F

Ignition Input Accessory

Severity

⚠️ Medium

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$17–89 (est.)

Symptoms

Car won't start in ACC position
Problems with the operation of accessories when the ignition is on
Dashboard flashing or turning off
Unstable operation of electrical equipment

Causes

Ignition switch malfunction
Damage to the ignition relay
Open or short circuit in the circuit
Problems with the engine control unit
Contact corrosion

How to Fix

Check the condition of the ignition switch
Diagnose the ignition relay
Check the integrity of wiring and connections
Scan the control unit for other errors
Replace faulty components

Related codes

U3000 U3001 U3002