Skip the auto shop - Our mechanics make house calls

Q: Check engine light is on

asked by on

Codes p0725 and p0335 coming up on computer. Check engine light on. Okay, so my check engine light came on. I brought it to see what code it was and it came up as bank one oxygen sensor. Then a while after my car wouldn't start one day. My friend us a mechanic si he came to help. I bought a camshaft and crankshaft sensor from AutoZone. He put them both in but didn't try one at a time because it was raining out. The car started right up. But the engine light remained on. Then a couple of weeks later I go to AutoZone to get an o2 sensor and they checked the code again but it wasn't coming up o2 sensor anymore. Now it was saying p0725 crankshaft sensor and p0335 engine speed sensor. So I brought it to my friend he put it on the computer and erased the codes thinking it might be just a history code. Didn't work. Then he put a Nissan crankshaft sensor in instead of the aftermarket one. That also didn't work. Check engine light is still on. Where should I go from here?

My car has 166418 miles.
My car has an automatic transmission.

Hello. If the trouble codes have remained after the crankshaft position sensor has been replaced then it may be possible that the issue lies elsewhere. P0335 is the trouble code for a crank position sensor malfunction. The circuit includes the sensor and all associated wiring and connectors, as well as the circuit within the computer. An open or short anywhere in the circuit will set off the light. If the sensor has been replaced with a new, original, replacement then the next thing to to look at would be the wiring and connector. P0725 is the trouble code for an issue with the vehicle’ speed sensor circuit. Same as with P0335, this trouble code can be set off by an issue with the speed sensors or associated wiring, or even the computer. I would recommend having a professional technician, such as one from YourMechanic, come to your location to diagnose the causing these trouble codes.

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: transmission control module failing. We just replaced the computer module (pcm) 4 days ago?

The P0700 trouble code is a code for transmission control module (TCM) failure. Without knowing the other codes, it will not be possible to give you an accurate answer; it all depends on the other codes: If you get...

Q: Hello Noe, I was wondering how much you would estimate a Timing Chain Guide Replacement on a 2004 sentra spec v?

Hi there. Actually, when you have a knocking sound that decreases after adding oil, it is typically caused by a lack of lubrication on top of the motor; where the cylinder head hardware is located. The knocking typically comes from...

Q: Check engine light on

This code is for evaporative emissions (EVAP) purge system performance. The EVAP system is responsible for preventing fuel vapor emission from entering the atmosphere. The EVAP system uses a purge valve to allow stored fuel vapors from the fuel tank...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...
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.