C0534

Motor Control A Supply Voltage Circuit/Open

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–222 (est.)

Symptoms

Engine won't start
Floating speed
Stalls at idle
Power Loss
Check Engine light comes on

Causes

Broken or damaged wiring harness
ECU power relay malfunction
Blown fuse
Short circuit in the circuit
Problems with the ECU itself

How to Fix

Check ECU power supply fuses
Check ECU power relay
Inspect the wiring harness for damage
Check voltage at ECU contacts
Replace relays, fuses or wiring harness as necessary
If the problem persists, check or replace the ECU

Related codes

P0560 P0562 P0563