Skip the auto shop - Our mechanics make house calls

Q: Car stalls, P0685 code

asked by on

In the last several days, I've been having issues with my car occasionally stalling. The car can be restarted immediately and run well after that. I had the codes read and the P0685 came on. What could be the problem with my car?

A: Hello. Most of the time this is caused by o...

Hello. Most of the time this is caused by one of two things on your vehicle. It is either because the powertrain control module, or engine computer, is failing internally, or the main relay that supplies power to it is going bad. Most of the time the relay is the issue. I usually start by testing the relay, though if it is an intermittent issue it may test fine. If that and the computer test fine I usually still replace the relay first. If you plan on having this repaired, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose your stalling issue and let you know what repairs to proceed with.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: When I accelerate, loud ticking noise at low rpm, car jerks and stutters. It goes away at higher rpms.

The misfiring could be ignition or fuel related. If the plugs have not been replaced, on the timetable set forth in the maintenance schedule, that is certainly one possibly. Also, the plug wires could be tested. Diagnostic Trouble codes that...

Q: Pop/Thud noise when backing up

The noise you are hearing is most likely an outer constant velocity joint on the right side or passenger side of the car. Have the axle joints checked to see if the outer joint boots are torn. If they are,...

Q: Engine knocking

Knocking in your engine, also described as pinging, can mean one of several problems. Some may be easily fixed while others may indicate major damage. The knocking sound often occurs when the fuel and air mixture is incorrect, which causes...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...