P0657 2005 Toyota Prius Code - Actuator Supply Voltage Circuit Open
Quick Answer
The Engine Control Module (ECM) continuously monitors its internal memory status, internal circuits, and output signals to the throttle actuator. Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine Control Module 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 2005 Toyota Prius indicates Actuator Supply Voltage Circuit Open.
- Common causes
- Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine Control Module 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 2005 Toyota Prius Description
The ECM memory status is diagnosed by internal mirroring of the main CPU and the sub CPU to detect Random Access Memory (RAM) errors. The two CPUs also perform continuous mutual monitoring. The ECM illuminates the MIL and sets a DTC if: 1) outputs from the two CPUs are different or deviate from the standards, 2) the signals sent to the throttle actuator deviate from the standards, 3) a malfunction is found in the throttle actuator supply voltage, and 4) any other ECM malfunction is found.
What are the Possible Causes of the DTC P0657 2005 Toyota Prius?
- Faulty Engine Control Module (ECM)
- Engine Control Module harness is open or shorted
- Engine Control Module circuit poor electrical connection
- Engine Control Module Programming update
How to Fix the DTC P0657 2005 Toyota Prius?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0657 2005 Toyota Prius 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 2005 Toyota Prius Code
1. What are the common symptoms of OBDII code P0657 in a 2005 Toyota Prius?
The common symptoms of OBDII code P0657 in a 2005 Toyota Prius include the Check Engine light illuminating on the dashboard, poor vehicle performance, and potential issues with the electronic throttle control system.
2. What does the OBDII code P0657 in a 2005 Toyota Prius indicate?
OBDII code P0657 in a 2005 Toyota Prius indicates a problem with the Actuator Supply Voltage Circuit Open, which is related to the electronic throttle control system.
3. What are the possible causes of OBDII code P0657 in a 2005 Toyota Prius?
Possible causes of OBDII code P0657 in a 2005 Toyota Prius include a faulty throttle actuator control module, damaged wiring or connectors in the actuator circuit, or issues with the powertrain control module.
4. How can I diagnose the Actuator Supply Voltage Circuit Open issue in my 2005 Toyota Prius?
Diagnosing the Actuator Supply Voltage Circuit Open issue in a 2005 Toyota Prius involves using an OBDII scanner to retrieve the fault code, inspecting the wiring and connectors in the actuator circuit for damage, and testing the throttle actuator control module for proper function.
5. Is it safe to continue driving my 2005 Toyota Prius with OBDII code P0657?
It is not recommended to continue driving your 2005 Toyota Prius with OBDII code P0657, as it can lead to poor vehicle performance and potential safety hazards due to issues with the electronic throttle control system.
6. How can I repair OBDII code P0657 in my 2005 Toyota Prius?
Repairing OBDII code P0657 in a 2005 Toyota Prius may involve replacing the throttle actuator control module, repairing or replacing damaged wiring or connectors in the actuator circuit, or reprogramming the powertrain control module.
7. Can I reset OBDII code P0657 in my 2005 Toyota Prius by disconnecting the battery?
While disconnecting the battery may temporarily clear the fault code, it is not a recommended long-term solution. It is best to diagnose and repair the underlying issue causing OBDII code P0657 in a 2005 Toyota Prius.
8. Will OBDII code P0657 cause my 2005 Toyota Prius to fail an emissions test?
Yes, OBDII code P0657 can cause your 2005 Toyota Prius to fail an emissions test due to issues with the electronic throttle control system affecting the vehicle's emissions output.
9. How much does it typically cost to repair OBDII code P0657 in a 2005 Toyota Prius?
The cost to repair OBDII code P0657 in a 2005 Toyota Prius can vary depending on the specific cause of the issue, but it may range from $200 to $600 for parts and labor at a repair shop.
10. Can I prevent OBDII code P0657 from appearing in my 2005 Toyota Prius?
Regular maintenance and inspections of the electronic throttle control system in your 2005 Toyota Prius can help prevent OBDII code P0657 from appearing. Keeping the system clean and ensuring proper wiring connections can also help prevent issues.
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