Error code

OBD2 P0657

OBD2P0657
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Actuator Supply Voltage 'A' Circuit/Open.

Severity

highCan drive but may experience intermittent issues.

Summary

P0657 indicates an open circuit in the actuator supply voltage 'A' circuit. This issue affects communication within the Controller Area Network (CAN) system.

Symptoms

  • Illuminated warning light
  • Pending code

Common Causes

  • Wiring issues such as burnt, damaged, shorted, or corroded wiring and connectors
  • Voltage spikes damaging electronic circuitry
  • Low battery voltage damaging delicate circuitry
  • Water ingress into control modules and wiring harnesses

Diagnosis

  1. Inspect all visible wiring for damage.
  2. Check fuses in affected circuits with a dedicated circuit tester.
  3. Thoroughly inspect and repair ground connections on control modules.

Fixes

  • Replace damaged or corroded wiring and connectors.

FAQ

Can I drive with P0657?

You can drive but may experience intermittent issues. It's recommended to address the issue promptly.

What causes P0657?

Common causes include wiring damage, voltage spikes, low battery voltage, and water ingress into control modules.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

More OBD2 codes

All OBD2 codes →Search more codes →