What is the code P0685 on a 2013 Honda Accord?
As a seasoned auto service provider, I often encounter various diagnostic trouble codes (DTCs) that can perplex vehicle owners. One such code is P0685, which is particularly relevant for 2013 Honda Accord owners. This article will delve into what this code means, its implications, and the steps you can take to address it.
What is Code P0685?
The P0685 code indicates a problem with the Engine Control Module (ECM) power relay circuit. Specifically, it signifies that the ECM has detected an issue with the relay that supplies power to it. This can lead to various performance issues, as the ECM is crucial for managing engine functions.
Common Symptoms of P0685
When your Honda Accord triggers the P0685 code, you may notice several symptoms, including:
- Check Engine Light illuminated
- Engine stalling or not starting
- Poor engine performance
- Increased fuel consumption
Possible Causes of P0685
Several factors can contribute to the P0685 code being triggered. These include:
- Faulty ECM power relay
- Wiring issues or short circuits in the relay circuit
- Defective ECM
- Corroded or loose connectors
Steps to Diagnose and Fix P0685
If you encounter the P0685 code, it’s essential to follow a systematic approach to diagnose and resolve the issue:
- Scan the Vehicle: Use an OBD-II scanner to confirm the P0685 code and check for any additional codes.
- Inspect the Relay: Locate the ECM power relay and inspect it for any signs of damage or wear.
- Check Wiring and Connectors: Examine the wiring and connectors associated with the relay for corrosion or loose connections.
- Test the ECM: If the relay and wiring are in good condition, consider testing the ECM to ensure it is functioning correctly.
- Replace Components as Needed: Based on your findings, replace any faulty components to resolve the issue.
Conclusion
Understanding the P0685 code is crucial for maintaining your 2013 Honda Accord's performance. By recognizing the symptoms and following the diagnostic steps outlined above, you can effectively address this issue and ensure your vehicle runs smoothly. If you're unsure or uncomfortable performing these checks yourself, don't hesitate to reach out to a professional auto service provider for assistance.
Frequently Asked Questions
Can a bad battery cause P0685?
If the 12v battery is weak this can cause all sorts of codes because the ecus don't work reliably if the voltage is low. This is probable because code P0685 is because the ecm has detected a low voltage. Replace the 12v battery and clean all the battery cables and earth connections.
How do I fix error code P0606?
How Do I Fix P0606? Code P0606 tends to be set when a PCM/ECM has failed. Depending on component condition and the make and model of a vehicle, it may be possible to resolve an internal integrity fault in the PCM/ECM by upgrading or re-flashing the control module.
How do I know if my ECM relay is bad?
What common symptoms indicate you may need to replace the ECM-Power Relay?
- Engine will not start when the key is turned.
- Engine doesn't turn over when ignition is on.
- Check Engine light is on.
- Battery drain which may leave it weak or dead.
How do you fix an emission control system fault?
Depending on the problem, possible solutions may include replacing damaged components such as the oxygen sensor, catalytic converter, or a vacuum hose. Leaking connections or damaged wiring may also be repaired or replaced to ensure the emission control system is working well.
How do I fix my PO685 code?
Here are some ways with the help of which you will be able to correct the OBD Code P0685:
- Shorts or bad terminals or connections repairs.
- Powertrain control module relay replacement.
- Under hood junction block replacement (fuse box)
- Bad Battery cables and/or connectors replacement.
- Fuse replacement.
How do I reset my power control module?
Locate the battery and identify the positive (+) and negative (-) terminals. Disconnect the negative terminal first. Wait for 10-15 minutes. Reconnect the battery terminals, starting with the positive terminal first.
What is the code P0606 on a Honda Accord?
The P0606 code relates to your engine's Powertrain Control Module (PCM) and its operability and state of condition. The PCM is the computer that assesses and controls all of your vehicle's vital components and systems; it is the brain behind your car.
Where is the PCM control module located?
engine compartment
The PCM is typically located in a protected area within the vehicle, such as under the dashboard, beneath the passenger seat, or in the engine compartment.
What is the code P0685 on a Honda Accord?
Diagnostic trouble code (DTC) P0685 stands for ECM / PCM Power Relay Control Circuit Open.” The powertrain control module (PCM) will set this trouble code when the voltage signal from the relay indicates that the circuit is open at the wrong time.
What is emissions system P0685?
This can be serious and needs to go to a repair shop. The code is for the cars engine control module power relay circuit. Could be as simple as a blown fuse, bad relay or the engine control module it'self is bad.
