Oxygen (lambda) sensor again
Thread Starter
New Member
Joined: Oct 2002
Posts: 21
Likes: 0
Oxygen (lambda) sensor again
Saw several posts but none that said they found the solution. Was wondering if anyone had the solution.
I replaced the bad sensor (with OEM), had a shop clear the code, and still the Check Engine light comes back on as soon as I hit 2,500 RPM.
Another shop tested it and said there was no power to the unit - so replacing it did nothing.
Has anyone found the solution to this?
Thanks,
Benedikte
I replaced the bad sensor (with OEM), had a shop clear the code, and still the Check Engine light comes back on as soon as I hit 2,500 RPM.
Another shop tested it and said there was no power to the unit - so replacing it did nothing.
Has anyone found the solution to this?
Thanks,
Benedikte
Member
Joined: Nov 2003
Posts: 2,478
Likes: 0
This looks like an electrical problem with a circuit that feeds the heating element in that O2
sensor. Possible reasons:
1. Generic aftermarket sensor (this happened to me when I've replaced my pre-cat OEM sensor with an aftermarket one, - it worked fine but triggered the CEL. I ended up returning it and spending more money on an OEM sensor)
2. Problem with the sensor connector or wiring (you'd need to get a voltmeter and start checking).
3. Problem with the ECU (this is extreme and very unlikely).
Since your problem didn't go away after the sensor replacement I am thinking you have a connector/wiring problem. Someone need to dig around with the voltmeter, checking voltage from the sensor up towards the ECU.
1. Generic aftermarket sensor (this happened to me when I've replaced my pre-cat OEM sensor with an aftermarket one, - it worked fine but triggered the CEL. I ended up returning it and spending more money on an OEM sensor)
2. Problem with the sensor connector or wiring (you'd need to get a voltmeter and start checking).
3. Problem with the ECU (this is extreme and very unlikely).
Since your problem didn't go away after the sensor replacement I am thinking you have a connector/wiring problem. Someone need to dig around with the voltmeter, checking voltage from the sensor up towards the ECU.
Thread Starter
New Member
Joined: Oct 2002
Posts: 21
Likes: 0
Electrical problem
Thanks - it was an OEM replacement so I will staRe: This looks like an electrical problem with a circuit that feeds the heating element in that O2rt checking things over with a voltmeter.
Thread
Thread Starter
Forum
Replies
Last Post
Kahuna-Big
A8 / S8 (D3 Platform) Discussion
0
Dec 18, 2009 06:23 PM
audiquattroduo
A6 / S6 (C5 Platform) Discussion
11
Nov 13, 2008 02:46 AM
Boston Driver
A6 / S6 (C5 Platform) Discussion
4
Jun 4, 2008 09:48 AM
DanosS4
S4 / RS4 (B5 Platform) Discussion
10
Nov 1, 2007 09:46 AM
