What is the code P0685 on a 2013 Honda Accord?
The P0685 code on a 2013 Honda Accord indicates an issue with the engine control module (ECM) power supply circuit. This code is triggered when the ECM detects a problem with the power supply to the module, which can lead to various engine performance issues or even prevent the vehicle from starting.
What is the P0685 Code?
The P0685 code is a diagnostic trouble code (DTC) that is specific to the Honda Accord and other Honda vehicles. It is classified as a "Powertrain" code, which means it is related to the engine, transmission, or related systems. The P0685 code is triggered when the ECM detects a problem with the power supply to the module, which can be caused by a variety of issues, including wiring problems, a faulty ECM, or a problem with the vehicle's electrical system.
Causes of the P0685 Code
There are several potential causes of the P0685 code on a 2013 Honda Accord, including:
- Faulty ECM power supply circuit: The ECM requires a constant power supply to function properly. If there is a problem with the wiring or connections in this circuit, it can trigger the P0685 code.
- Faulty ECM: If the ECM itself is malfunctioning, it may not be able to properly monitor the power supply, leading to the P0685 code.
- Electrical system issues: Problems with the vehicle's battery, alternator, or other electrical components can also cause the P0685 code to be set.
It's important to have the code diagnosed by a qualified mechanic to determine the root cause and address the issue properly.
Symptoms of the P0685 Code
The P0685 code can cause a variety of symptoms in a 2013 Honda Accord, including:
- Engine stalling or not starting: If the ECM is not receiving the proper power supply, it may not be able to control the engine, leading to stalling or the engine not starting at all.
- Reduced engine performance: The ECM controls various engine functions, so a power supply issue can lead to reduced power, acceleration, and fuel efficiency.
- Illuminated check engine light: The P0685 code will trigger the check engine light on the dashboard, alerting the driver to the issue.
If you experience any of these symptoms in your 2013 Honda Accord, it's important to have the vehicle diagnosed and the P0685 code addressed as soon as possible to prevent further damage or issues.
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.
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.
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.
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 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 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.
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.
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 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.
