» » »

Nissan Q&A

Ask Your Question

2000 Nissan Quest Question: check engine light

 

Question

alhamy, Hilliard, OH, February 04, 2009, 16:27
 Rookie

check enging light p0325 knock sensor bank 1 or sensor closed loop bank 1 p0135 o2 sensor
i bought the car with check enging light on i 've changed on of the o2 senser and i did tun up on it but still the light still the code in the scanner readind the code in the top

3 Answers
Flag This
  • Answer #1

    Bret Bodas from RepairPal Test Shop, February 04, 2009, 17:22
     Master

    I want to help, but I'm unsure what your question is?

    Reply
    Flag This
  • Answer #2

    Andy Y February 04, 2009, 18:03
    Profile_thumbnail
     Master

    Did you clear the code after the repair? Did the check engine light come back on?

    Reply
    Flag This
  • Answer #3

    patrick mannion from Greg Solow's Engine Room, February 04, 2009, 20:39
    Profile_thumbnail
     Master

    The PO325 knock sensor code is common on many Nissans, it doesn't bring on the Service Engine Soon if is performance related, it will bring on the light if the sensor goes open circuit.. These engines just always seem to have that code when you are presented with another trouble code, so go after the Oxygen Sensor related code first. The code P0135 is for the heater circuit control in the front O2 Sensor. If you still have the old O2 sensor check the electrical connector on the old sensor two of the wires should have continuity to each other (this is the heater circuit, if none of the wires at the connector have continuity the sensor is in fact defective but they sometimes go "open only when hot operating conditions). The electrical harness itself gives problems and failure occurs bringing on the Service Engine Soon light. Ignition key on you should have power (12V) at the disconnected O2 sensor harness. The computer grounds the sensor heater circuit as required. The problem may have to be fixed by "ohming" out the harness wires until the fault is found. I suspect by fixing the P0135 problem your service light will stay out once reset. The knock sensor is labor intensive to replace.

    Reply
    Flag This