P0657

Symptoms

• Check Engine light comes on
• Multiple actuator fault codes
• Engine emergency mode
• Inoperative solenoids or relays
• Unstable operation of systems controlled by circuit actuators A

Causes

• Break in the power supply wire of circuit A of the actuators
• Blown actuator power supply fuse
• Wiring harness damage
• Malfunction of the actuator power relay
• Malfunction of the internal output stage of the ECU (rare)

How to Fix

1. Check the actuator power supply fuses
2. Check the actuator power relay
3. Measure the voltage at the output of circuit A with the ignition on.
4. Inspect the wiring harness for breaks or damage
5. Repair power supply or replace relay/fuse
6. If necessary, diagnostics of the ECU output stage

Related codes

Error P0657 by Vehicle Brand