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THROTTLE POSITION SENSOR, MISFIRE, #4 MISFIRE, KNOCK SENSOR, THESE ARE YOUR TROUBLE CODES, PO120,PO300, PO304, PO325, RESPECTIVELY, REPLACE THE TPS @ THROTTLE BODY, REPLACE KNOCK SENSOR , @ ENGINE BLOCK, REPLACE YOUR SPARK PLUGS & PLUG WIRES ! AND YOU MUST ALSO REPLACE BOTH YOUR AIR & FUEL FILTERS, DISTRIBUTOR CAP & ROTOR , INSPECT, MAY NEED TO REPLACE, I WOULD ANYWAY !!!!!!!! ADD SOME GOOD FUEL INJECTOR CLEANER TO TANK, NEXT FUEL UP !
I had a 2001 nissan xterra in my shop,and it had the same codes. there is a very common problem with the distributor on nissan 3.3 motor. I am not sure where you are,but get a price for the distributor. I got one from ebay cheap
P0325 NISSAN - Knock Sensor Circuit Malfunction Possible causes- Faulty knock sensor - Knock sensor circuit short to ground - Knock sensor circuit short to power - Knock sensor circuit open - Faulty Engine Control Module (ECM)
The po340 is a cam sensor code ,po325 is a crank sensor code>THE crank if it goes bad will through both codes,and also the car will not start.You will have no spark or injector pulse.So have your crank sensor checked:)
the PO 325 code is for VSS vichicle speed sensor and PO500 is for a knock sensor,so you will need to see what the new code is to be able to help you, the engine power manegment is controled by both get it scanned by autozone or the mechanic that did the work and see if it's the same code, if it is you may have a short or an ecm going bad. let us know what codes you find.
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
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