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Error Code: P0325 PCM Knock Sensor Circuit

 
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  #1 (permalink)  
Old 25 Nov 2010, 08:55 am
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Default Error Code: P0325 PCM Knock Sensor Circuit

I have this error code. What does it mean and how do I fix it??
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Old 25 Nov 2010, 09:17 am
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Default Re: Error Code: P0325 PCM Knock Sensor Circuit

Found this on an older thread:

-----------------------------------------

P0325 OBD-II Trouble Code
Technical Description

Knock Sensor Circuit Malfunction
What does that mean?

A knock sensor tells the engine computer when one or more of your engine's cylinders are "knocking", that is, exploding the air/fuel mixture in a way that delivers less power and can be damaging to the engine if prolonged. The computer uses this information to tune the engine so that it doesn't knock. If your knock sensor wasn't operating properly, so that it was always indicating a knock, the engine computer's response may have been to change the ignition timing on your engine. The knock sensor generally threads into the engine block. This P0325 code may show up intermittently or the Service Engine light may be lit constantly.
Symptoms

You may notice drivability problems including a lack of power and perhaps some hesitation. There may also be other symptoms.
Causes

A code P0325 most likely means one or more of the following has happened:

* The knock sensor is faulty and needs to be replaced
* There is a wiring short/fault in the knock sensor circuit

Possible Solutions

* Check the resistance of the knock sensor (compare it to factory specs)
* Check for broken/frayed wires leading to the sensor
* Replace the knock sensor

P.S. Don't forget, you have a major maintenance requirement due NOW. Your timing belt and water pump should be changed at or before 100K miles or you'll be coming back again asking why the your PT won't start.
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Last edited by CREWZIN; 25 Nov 2010 at 09:23 am.
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Old 25 Nov 2010, 09:56 am
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Default Re: Error Code: P0325 PCM Knock Sensor Circuit

Where do I find it and how do I get to it???
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Old 25 Nov 2010, 10:19 am
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Default Re: Error Code: P0325 PCM Knock Sensor Circuit

I only have the manual for the 01-03 cruisers so I don't know if they changed the location in later years. They did change the location of the Crankshaft sensor in 04.

The Knock Sensor is threaded into the front side of the cylinder block, near the starter. Remove the battery for access.

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Old 25 Nov 2010, 10:27 am
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Default Re: Error Code: P0325 PCM Knock Sensor Circuit

Oh Yea, no need to say THANK YOU. You haven't said a word on the first 5 questions you posted on the forum.

Remember these:

How to adjust the idle?
Rough idle with A/C on?
Best grade of oil after 100K?
Crack in body paint?
What else besides ATF+4?
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Old 25 Nov 2010, 01:03 pm
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Default Re: Error Code: P0325 PCM Knock Sensor Circuit

Well let me say thank you.
You have given me lots of helpful advice including this thread.

Quote:
Originally Posted by CREWZIN View Post
Knock Sensor Circuit Malfunction

You may notice drivability problems including a lack of power and perhaps some hesitation. There may also be other symptoms.
Causes
This sounds like the problem I am having too, although I do not have a code.
However I will check the wiring tonight.
Thanks again Crewzin !!
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Old 25 Nov 2010, 01:22 pm
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Default Re: Error Code: P0325 PCM Knock Sensor Circuit

Your welcome Bob. Hope it turns out to be the answer to whatever problem your having.
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Old 30 Nov 2010, 05:20 pm
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Default Re: Error Code: P0325 PCM Knock Sensor Circuit

Quote:
Originally Posted by CREWZIN View Post
I only have the manual for the 01-03 cruisers so I don't know if they changed the location in later years. They did change the location of the Crankshaft sensor in 04.

The Knock Sensor is threaded into the front side of the cylinder block, near the starter. Remove the battery for access.

Hi Crewzin,

This procedure to remove the knock sensor is the same for the PT Turbo 2003?
I a PT cruiser from mexico, My PT have a stage 1 and magnaflow catback and in high speed a knock noise is heard "cla cla cla" I changed the fuel pump, my PT used premium fuel, but I only need to change the knock sensor.

Regards from Mexico
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Old 30 Nov 2010, 06:32 pm
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Default Re: Error Code: P0325 PCM Knock Sensor Circuit

Jaguar,

The book I took the picture from is for both the Turbo and Non-Turbo engines. If there was a difference they should have put two different pictures.....and they didn't, so I would think that the knock sensor is in the same position for both vehicles.
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Old 30 Nov 2010, 11:37 pm
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Default Re: Error Code: P0325 PCM Knock Sensor Circuit

The knock sensor is also in the same place on a non-turbo 2006 if anyone is looking for it.

On my 2006 it is easier to access it from below.
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