Skip the auto shop - Our mechanics make house calls

Q: What does trouble code P0325 mean?

asked by on

My code says knock sensor 1 "b1 circuit." What does that mean? Is it worth fixing?

Scott

My car has 171000 miles.
My car has an automatic transmission.

A: Hi there - P0325 is a Knock Sensor Malfunct...

Hi there - P0325 is a Knock Sensor Malfunction. Knock sensors provide a significant function in a modern engine. A failure of the engine knock sensor is a somewhat risky issue. Modern engine have fairly high compression ratios, all in the name of maximizing fuel efficiency and power. This makes for high cylinder pressure during combustion, and makes the engine more likely to experience "pre-detention" or knocking. The knock sensor is critical in detecting this, and retarding engine timing to avoid this destructive issue. If it is essential to drive a few days with this problem, take care to keep your foot out of the gas as much as possible. Yes, it absolutely needs to be repaired to avoid engine damage, and improve efficiency. I would replace the knock sensor as soon as possible. Unfortunately, this is not a service YourMechanic offers at this point in time. Thanks for thinking of us!

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: Car won't shift from Park to Drive - it only shifts to third gear

The problem you have described with your vehicle not shifting from park to drive could be a problem with the shifter mechanism. It could be a worn shift cable and/or bushings. I recommend having your vehicle's not shifting from park...

Q: Car turns off after starting

This may be related to many different possibilities, some of which may be related to a lack of spark and some of which may be related to a fuel delivery problem or a combination of both. For example, if the...

Q: How would I open my car hood when I foget the keys and the car is totally locked

You cannot open the hood as easily as opening the door using a locksmith. If the cable broke and you need to get in, then a mechanic would have to raise the vehicle and get to the latch for you....

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...
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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...