Mechanics

CHECK ENGINE LIGHT ON

1999 Infiniti I30

Computer problem
1999 Infiniti I30 6 cyl Front Wheel Drive Automatic 145000 miles

I had the check engine light on. The diagnostic code is " P1320 & P0325". Please tell me what is the problem? And what is reasonable cost to repair?
Thanks a lot
Avatar
Phuoc
December 23, 2008.




P1320: Ignition/Distributor Engine Speed Input Circuit Malfunction

There is a TSB on this.
1. Use CONSULT-II to confirm DTC P1320 is stored in the ECM.
2. Check the ECCS wiring harness for a broken or damaged wire causing the incident. Refer to
Technical Service Bulletin ITB98-006B, EGI HARNESS WIRE BREAKAGE DIAGNOSIS
AND REPAIR PROCEDURE.
A. If the ECCS harness is found to have a broken or damaged wire causing the incident: Repair the harness
Clear any DTC codes stored in the ECM
Verify the incident is resolved
Return the vehicle to the customer
B. If the ECCS harness is not the cause of the incident: Replace the ignition coil(s) with the one(s) listed in the Parts Information table
Clear any DTC codes stored in the ECM
Verify the incident is resolved
Return the vehicle to the customer

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

Tiny
Zackman
Dec 23, 2008.


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