Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car has a problem with the power going to a part that helps control things like the engine or transmission. It's like a toy that isn't working because the batteries aren't connected properly.
The P0657 code indicates that the power supply circuit for a specific actuator is open or not functioning correctly.
The P0657 code is triggered when the Engine Control Module (ECM) detects an open circuit or a malfunction in the actuator supply voltage 'A' circuit. Actuators are components that receive signals from the ECM to perform actions such as adjusting the throttle or shifting gears. An open circuit means there is a break in the electrical path, preventing the actuator from receiving the necessary voltage.
• Check Engine Light is on
• Poor engine performance
• Transmission shifting issues
• Reduced fuel efficiency
• Faulty actuator
• Open or shorted actuator supply circuit
• Blown fuse or faulty relay
• Corroded or damaged connectors
• Faulty ECM
Actuator: A device that receives a control signal and performs an action, such as opening a valve or moving a lever.
ECM: Engine Control Module, the computer that manages engine functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the actuator and its wiring for damage or disconnection.
• Check fuses and relays associated with the actuator circuit.
• Test the voltage supply to the actuator.
• Repair or replace damaged wiring or connectors.
• Replace the faulty actuator.
• Replace blown fuses or faulty relays.
• Check and repair the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools (screwdrivers, pliers)
$100 - $500
Moderate
• Chevrolet Silverado
• Ford F-150
• Toyota Camry
• Regularly inspect electrical connections for corrosion.
• Ensure proper maintenance of the vehicle's electrical system.
• Avoid exposure of electrical components to moisture.
Electrical Circuit Issue
• Avoid driving long distances until the issue is resolved.
• Consult a professional mechanic for an accurate diagnosis.
Check with your vehicle manufacturer for specific warranty coverage on electrical components.
This code has been associated with actuator circuit issues across various vehicle models, often related to wiring or connector problems.
Moderate – While the vehicle may still be drivable, it can lead to further issues if not addressed.
Ignoring this code may lead to increased emissions or unsafe driving conditions. It is advisable to address the issue promptly.
• Vehicle must be running.
• Check under various load conditions.
The actuator and its circuit are typically located near the engine or transmission, depending on the specific actuator involved.
Q: Can I drive with a P0657 code?
A: While you may be able to drive, it's not recommended as it can cause further damage or affect vehicle performance.
Q: How do I clear a P0657 code?
A: Fix the underlying issue first, then use an OBD-II scanner to clear the code.
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