Check Engine light due to O2 sensor and Knock Sensor Circuit problem (OBD II codes: 0135, 0141 and 0325)
Hi, everybody;
Happy New Year.
I'd like to share with you my experiece of fixing a Check Engine light problem caused by the O2 sensor in my 1999 Nissan Quest. I believe it will be useful to people having similar causes of the problem. At a minimum, it will give you a top list to check even though the root cause of the problem is not the same as mine.
My Check Engine light turned on over a month ago. My mechanics told me it was caused by bad O2 sensors (error codes 0135 and 0141) and knock sensor (0325). Replacing the two O2 sensors is relatively cheap, about $300 to $400. But for the knock sensor you are talking about $700 to $1000. I did not let him do it partially because of the high cost and partially I was uncomfortable about the fact that he reached the conclusion based on the readings from his scan. I thought he would test the O2 sensor at a minimum.
I won't go through how this negatively impacted my holiday and how much time I spent on searching Internet for clues and fixes. The Haynes Repair Manual did a very poor job on this. I got it fixed after I got the 1999-2002 Nissan Quest Factory Service Manual.
The fix was so simple that any not-bad mechanics could not charge you over $10 besides the $90 diagnosis fee he will charge you.
The problem was caused by the broken O2 sensor fuse in the fuse box. You just need to take out the bad oen (7.5 A) and replace it by a spare fuse inside the fuse box. You can finish this in 1 minute.
The following are the tools recommended for checking similar problems:
1. order a simple scan. It cost me $33 from www.autonostics.com. It'll tell you the trouble codes.
2. order a 1999-2002 Nissan Quest Factory Service Manual. I got it from eBay at $10. You can contact importautowork@yahoo.com if you want to order it from the same guy I ordered from.
OBD II codes 0135 and 0141 basically say that there is no voltage going through the O2 sensor heater or the sensor heater is gone, i.e. no resistance through the heater.
The knock sensor trouble code (0325) is collateral damage from O2 sensor problem in this case. It may go away after the O2 sensor is fixed.
The fuse box is located underneath the driving wheel, on the left hand side.
The down stream O2 sensor is located close to the oil pan in case you are looking for it.
Good luck.
Sean
02 sensor knock sensor, engine light
My light came and I replaced the oem sensors and even the knock sensor. MONEY SAVING TIP OF THE DAY! It turned out to be the "sensitive distributor" that Nissan Quests have. I had a tuneup right before the light came on and it disturbed the distributor. You will need a Nissan distributor and you are fixed. NISSAN PART ONLY. It has been 8 months now and no problems.
ReReG
Duh, didn't see the earlier post
Found 1999 manual at the Nico site with fuse diagram.
Thanks again. This thread should be a sticky.
Same problem
Thumbs up to Sean.
I got the exact problem with my wife's 1999 Quest.
Auto Zone gave me the code reading for free and the guy at the counter said he has never seen so many code off a bad O2 sensor. The clue should have been the constant reference to bad circuitry. The sensors are not getting any juice.
My problem now is somebody had removed the fuse box cover and I don't have spare fuse or fuse puller. I could use a diagram too, which should be on the cover.
Can somebody provide a picture of the diagram from their Quest or a page from the manual? I can get the fuse and puller from Auto Zone but the diagram would be a huge help.
Thank you in advance.
You guys rock.
ooops
ooops
Still having Engine light on
Hello Folks,
I am sincerely hoping someone can help me out on this.
History:
1. My engine light came on over a year ago and was found to be O2 sensor issue. I first took it to a mechanic who replaced BOTH ban1 and Bank 2 O2 sensors (I only paid for 1) and the light was still on. He mentioned that the ECM might be bad, and recommended I take it to a dealer to reprogram the ECM
2. I then took it to another mechanic, to try all the solutions I researched on the net, and did the following. A. Replaced thermostat B. My radiator was also leaking, so replaced that too, to rule out any temp variations C. Replaced the fuse as recommended above
3. I finally took it to a dealer, who charged me $96 to reprogram the ECM, and the Engine light is STILL on....
4. I also read on the internet that there might be SEVERAL other reasons why the engine light might be on due to the P0135 code, and was at a loss to understand why.
I truly appreciate any help I can get, and hope to resolve this soon, as my pollution sticker is already past due for renewal, and taking it to 3 different mechanics has still not fixed the problem :(
Vehicle details:
1999 Nissan Quest SE model
Best Regards
re: Still having Engine Light on
Here's a thread on P0135 on a 1998 Nissan Quest. If the Oxygen sensors have been changed, ask your mechanic to check the connectors.
http://www.fixya.com/cars/t819928-p0135_code
2004 Quest S
Your recommended tools for checking similar problems
Hello Sean,
Thank you for your valuable input. I am getting many fault codes on my 99 Quest. See my topic Need assistance to solve '99 GXE engine problem.
What I am worry about is to buy the Haynes Repair Manual or to order the CD (1999-2002 Nissan Quest Factory Service Manual) you talked about. I would appreciate your input. Is it a scanned copy (readable) of a book and is it helpful? Does the CD include diagnostic procedure and troubleshooting? Would you be kind enough to send me a sample page of the PDF for evaluation? Thank you.
Sincerely,
Hugo
Hugo, It is a scanned copy
Hugo,
It is a scanned copy of a book and is helpful. It does include diagnostic procedure and troubleshooting.
Regards
Sean
question
what was the fuse block number and name of the fuse?
I am having issues with a 96 quest where i just replace the 02 sensors and they still throw codes.
www.nicoclub.com has factory
www.nicoclub.com
has factory service manuals for free to download in pdf format
knock sensor
I cannot find the FSM at nicoclub web site. for my 2001 Quest.
you didn't try hard enough
... i found it in less than one minute, gimme my money yo!
http://www.nicoclub.com/FSM/quest/2001_Quest/