Skip the auto shop - Our mechanics make house calls

Q: Fix code P0325.

asked by on

I have this troubleshooting number for the Nissan, P0325, with the probable causes being a defective knock sensor, check connector and the wiring to the sensor, low fuel pressure, an engine mechanical condition, a failed relay, and/or a throttle control motor relay circuit. I had replaced my engine with a used engine the prior year. While I am not sure what the main issue is, I believe it might be the knock sensor.

If all of those parts have been swapped over from one engine to the other it is possible that one of those parts are the cause considering the engine was replaced and assuming it was rebuilt correctly. If the engine does not have a mechanical issue, the knock sensor may be the most likely cause. I would recommend having your vehicle looked at by an engine professional to determine the cause of your issue.

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: Repeatedly blowing the same fuse

Hi. I can't help you much without knowing which fuse is blowing. Fuses are designed to blow to protect the circuit in the case off too much current draw. You're correct that a short can cause a fuse to blow....

Q: What is the Security indicator light on the dash?

Your Altima comes from the automaker with a security system built into it. You’ll notice that the Security indicator light blinks in the dash – it should do this when the key is off (or not inserted), when you turn...

Q: Changed brakes and rotors now the emergency brakes is squeaking when driving. What could be wrong?

Hey there. As you may know, your emergency brake is operated and controlled by a separate drum brake assembly located behind the rear disc brakes. The emergency brake is operated by a drum brake set up with brake shoes that...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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.