P0657 Mercury Code - Actuator Supply Voltage 'A' Circuit Open
Quick Answer
The Powertrain Control Module (PCM) monitors the transmission solenoid circuits by supplying voltage to the solenoids through this circuit, then checking for voltage returning from the solenoids through each of the individual solenoid control wires. Common causes include Faulty Transmission Solenoids, Transmission Solenoids harness is open or shorted, Transmission Solenoids circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0657 Mercury indicates Actuator Supply Voltage 'A' Circuit Open.
- Common causes
- Common causes include Faulty Transmission Solenoids, Transmission Solenoids harness is open or shorted, Transmission Solenoids circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0657 Mercury Description
However, DTC P0657 sets when ALL of the solenoids do not have the correct voltage returning to the PCM all at the same time.
What are the Possible Causes of the DTC P0657 Mercury?
- Faulty Transmission Solenoids
- Transmission Solenoids harness is open or shorted
- Transmission Solenoids circuit poor electrical connection
- Faulty Powertrain Control Module (PCM)
How to Fix the DTC P0657 Mercury?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0657 Mercury code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0657 Mercury Code
1. What does the OBDII code P0657 mean on a Mercury vehicle?
P0657 indicates an open circuit in the Actuator Supply Voltage "A," which is responsible for delivering power to various actuators in the vehicle.
2. What are the common symptoms of the P0657 code in a Mercury?
Symptoms may include poor engine performance, a lack of power, the engine not starting, or the check engine light being illuminated.
3. What causes the P0657 code to appear on a Mercury?
Possible causes include damaged or corroded wiring, a faulty actuator control module, a blown fuse, or a malfunctioning engine control module (ECM).
4. Can I drive my Mercury with the P0657 code active?
It is not recommended, as this code can lead to performance issues or leave the vehicle unable to start. Prompt diagnosis and repair are advised.
5. How do I diagnose the P0657 code on a Mercury?
Start by checking for damaged or loose wiring, inspecting fuses, and testing the actuator control module and ECM for proper functionality using a multimeter or scan tool.
6. What tools are needed to troubleshoot the P0657 code?
You will need an OBDII scanner, a multimeter, and basic hand tools to inspect wiring, fuses, and connections.
7. How do I fix the P0657 code on a Mercury?
Repairs may involve replacing damaged wiring, repairing corroded connections, replacing a blown fuse, or replacing the actuator control module or ECM if faulty.
8. Is the P0657 code exclusive to Mercury vehicles?
No, the P0657 code can appear on any OBDII-equipped vehicle, but the diagnosis and repair process may vary depending on the make and model.
9. How much does it cost to fix the P0657 code on a Mercury?
Repair costs depend on the root cause but typically range from $100 for wiring repairs to $1,000 or more if the ECM or actuator control module needs replacement.
10. Can a low battery cause the P0657 code on a Mercury?
Yes, a weak or low battery can cause voltage supply issues and potentially trigger the P0657 code. Ensure the battery is fully charged and in good condition.
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