U3004

Accessory Power Relay

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$3–17 (est.)

Symptoms

Some electronic options of the car do not work
Periodic shutdown of additional equipment
Check Engine Light Is On
Problems starting some systems

Causes

Faulty power relay
Open or short circuit in the relay circuit
Problems with the control unit
Contact corrosion
Wiring harness damage

How to Fix

Check the condition of the power relay
Check the integrity of the relay circuit
Inspect contacts for corrosion
Check the voltage at the relay terminals
If necessary, replace the relay

Related codes

U3000 U3001 U3003