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To make a long story short, this looks like a classic case of a bad pre-cat O2 sensor.
Replace O2 sensor, reset codes, re-evaluate.
Replace O2 sensor, reset codes, re-evaluate.
Audi 1.8T O2 Sensor Codes...CEL..Help me confirm please?
- Thread starter wavinwayne
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Thanks for the input gents.
Just didn't want to blow my friend's money capriciously.
Just didn't want to blow my friend's money capriciously.
Could you switch sides with the sensors? If you do that and the problem moves too,it pretty much has to be the sensor.
Good point John. We could try that assuming both sensors are of the same type. I will look into that.
I got 4 sensors for my maxima from
www.ngk.com
and replaced them yesterday. Fair prices compared to the dealerships.
Now I had 100K on the OEM sensors, it was time to change mine, I don't have to think about it for another 60-100K miles.
www.ngk.com
and replaced them yesterday. Fair prices compared to the dealerships.
Now I had 100K on the OEM sensors, it was time to change mine, I don't have to think about it for another 60-100K miles.
I am helping my friend with his 2000 A4 1.8T, since his CEL is illuminated.
I scanned the codes and came up with this:
- p1113 - Bank 1 Sensor 1 internal resistance too high.
- p1136 - Long Term Fuel Trim Add. Fuel System too lean.
This would seem to me to be a simple O2 sensor problem. However, since the O2 sensor is pretty expensive, I was hoping for a little input before we go ahead and replace it.
A few questions. It seems to me that the p1113 problem is actually causing the p1136 problem. Does it stand to reason that a new O2 sensor would correct both codes?
Secondly, my understanding is that Bank 1 typically means driver's side and sensor 1 typically means closest to the front of the car (and as such, upstream of the catalyst). Can anyone confirm my understanding? I'm guessing this car has only two sensors, one likely in the exhaust manifold (4 cylinder car) upstream of the catalyst, and one after cat.
Any help is appreciated.
Thanks.
I scanned the codes and came up with this:
- p1113 - Bank 1 Sensor 1 internal resistance too high.
- p1136 - Long Term Fuel Trim Add. Fuel System too lean.
This would seem to me to be a simple O2 sensor problem. However, since the O2 sensor is pretty expensive, I was hoping for a little input before we go ahead and replace it.
A few questions. It seems to me that the p1113 problem is actually causing the p1136 problem. Does it stand to reason that a new O2 sensor would correct both codes?
Secondly, my understanding is that Bank 1 typically means driver's side and sensor 1 typically means closest to the front of the car (and as such, upstream of the catalyst). Can anyone confirm my understanding? I'm guessing this car has only two sensors, one likely in the exhaust manifold (4 cylinder car) upstream of the catalyst, and one after cat.
Any help is appreciated.
Thanks.
I would agree that this sounds like a bad O2 sensor. If the sensor was reading wrong, it would cause the fuel trims to be inaccurate, so I'd ignore the 1136 code for now. Finally, most 4 cylinders have only one cylinder bank, so that's irrelevant, but sensor 1 would be the one in the exhaust manifold. Sensor 2 would be after the cat.
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