Hi the error code relates to the PCM Knock Sensor Circuit
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
Hope this helps
Steve
Your 1993 OBD1 system does not have a "p" numerical code, any code that starts with a "p" is an OBD2 system, and OBD2 did not come out untill late 96/97 model years.
Bad "knock sensor"
SOURCE: I have a 1997 Nissan Quest . Check engine light is
if you can get the codes... why don't you have a book that comes with the code reader
get yourself a Haynes manual #64200 at your local parts store or online
SOURCE: Diagnostic codes
744 is to do with your torque converter clutch circuit, intermittent malfunction. 325 is knock sensor malfunction. Has vehicle been shifting different, probably at highway speed? (cruising) Have you noticed engine "ping"/"rattle" on acceleration? These would be common occurences with these codes.
SOURCE: OBD malfunction indicator light status on stored
CODE PO325 - KNOCK SENSOR. CODE PO335 -CRANK SHAFT POSITION SENSOR. CODE PO336 - I DID NOT SEE CODE PO336.
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