What does fault code p0685 mean in OBD II?
What does fault code p0685 mean in OBD II?
What Does Code P0685 Mean? OBD II fault code P0685 is a generic code that is defined as “ECM/PCM power relay -circuit open”, and is set when the PCM (Powertrain Control Module) detects that its own power supply has failed, or if it detects a low voltage in the circuit that supplies it with power.
Why does my ECM have the code p0685?
Since the code P0685 is usually accompanied by a no-start condition, ignoring it will not likely be an option. If this code is present and the engine will start and run, suspect a faulty PCM or a PCM programing error. Potential causes for this code to set are:
What does p0685 mean on a power relay?
This causes the contacts inside of the relay to close; essentially completing a circuit thus providing battery voltage to the output terminal and consequently to the PCM. Since the code P0685 is usually accompanied by a no-start condition, ignoring it will not likely be an option.
What does it mean when a p0688 code is stored?
When a code P0688 is stored, it means that the powertrain control module (PCM), has detected an abnormality in the relay which supplies it with voltage. In this case the relay sensor circuit is open. Open could be translated as disconnected.
What Does Code P0685 Mean? OBD II fault code P0685 is a generic code that is defined as “ECM/PCM power relay -circuit open”, and is set when the PCM (Powertrain Control Module) detects that its own power supply has failed, or if it detects a low voltage in the circuit that supplies it with power.
What causes a p0685 power supply circuit to open?
Some common causes of code P0685 could include the following- Defective PCM power-supply relay Low system voltage Damaged, burnt, shorted, disconnected, or corroded wiring and/or connectors, including battery terminals Defective ignition switch Failed or failing PCM or other control module.
What is fault code for ECM / PCM Power relay?
Wiring, ECM/PCM power relay. We recommend Torque Pro. OBD II fault code P0685 is a generic code that is defined as “ECM/PCM power relay -circuit open”, and is set when the PCM (Powertrain Control Module) detects that its own power supply has failed, or if it detects a low voltage in the circuit that supplies it with power.
Where does the Orange Wire go in a heat pump?
This wire goes to the outside heat pump condenser, for reversing valve control. Finally, this is for heat pump thermostats. Orange Wire for O and Dark Blue Wire for B, depending on the installer of the heat pump and the manufacturer.
Where is the p068a error code stored?
The fifth wire, on the other hand, is the power relay sense circuit, and the PCM uses it to monitor the power relay voltage. Error Code P068A is stored when the ECM/PCM has determined a defect in the de-energizing procedure for the relay which supplies it with voltage. Meaning, the relay is de-energized as well.
Some common causes of code P0685 could include the following- Defective PCM power-supply relay Low system voltage Damaged, burnt, shorted, disconnected, or corroded wiring and/or connectors, including battery terminals Defective ignition switch Failed or failing PCM or other control module.
How much does it cost to diagnose a p0688 code?
The cost of diagnosing the P0688 code is 1.0 hour of labor. The auto repair’s diagnosis time and labor rates vary by location, vehicle’s make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
