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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Timing and cam phaser

Hi there. Assuming, the cam phaser/timing chain component repair was properly performed. The rough idle within two hours of picking up the vehicle may be, something has come loose (ie; a vacuum line). The repair facility should be willing to...

Q: VSA problem

Hi there. The VSA light is on indicating that the traction control is active. This will turn on the brake system and try to control the vehicle in the event a tire will slip. The wheel sensor on the left...

Q: Overheating

If the engine overheats in the first 5 to 7 minutes of running then you most likely have a water pump that is not circulating fluid or the thermostat is stuck in the closed position. You should start and run...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...