Q: Q: P0171

asked by on

code P0717 keeps coming up sporadically. When the "check engine" light comes on the car shifts rough but when it goes away it runs fine. I checked the resistance of both input and output sensors and they both register the same 623 omhs. I don't mind replacing the sensor or both sensors but I'm not sure if that is cause of the problem. Do these sensors go out gradually or suddenly? Any suggestions?

My car has 86000 miles.
My car has an automatic transmission.

Hi there. This code you are getting is due to your system running lean. Most of the time, it is caused by low fuel pressure from a weak fuel pump or a clogged fuel filter. Another possible cause can be due to dirty injectors. I usually check these potential issues first to see if they are fine before checking the oxygen sensors. If the components turn out to be defective, they will need to be replaced. If you need this P0171 code checked, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose and repair anything that is needed.

Was this answer helpful?
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: I can put my clutch in and put the car in gear and car won't die?

The first issue sounds like you have throttle problem. You may want to take off the intake and see if your throttle body is moving freely. It could be dirty and need to be cleaned. Check the cable that is...

Q: Starter bad and car won't start.

I would recommend that you ask for help from a mechanic, possibly from YourMechanic, who has the diagnostic equipment and experience to check your starting system and determine why your car will not start.

Q: I installed a new fuel pump, but the line from the pump to the carb is leaking at the flare fitting on the pump

Hello, thank you for writing in. The hardest part is done. Locating and noticing the leak is typically where people fail to follow through with their repairs. The flare on the line was likely bent or damaged. They are very...

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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.