Hi Guys,
Right, the patient is our usually rock steady reliable Bananamobile, otherwise known as our Y Reg, A4 B5 Avant SE. It's just coming up for 126k miles and has thrown up a running rich code recently, resulting in increasingly poor performance on acceleration and cutting out at idle after initial start.
The initial code was
17545 - Fuel Trim: Bank 1 (Add) System too rich
P1137 - 35-00 - -
T-stat and water temp sensor were changed in the last year, along with plugs and all filters.
No other fault codes present at that time.
After doing a bit of reading, I ordered a new Bosch MAF sensor, which I fitted today. Result - no change! I then noticed that the vacuum pipes at the rear of the engine looked a little perished, so I changed them all for new hose. I also checked connections and sprayed with electrical contact cleaner.
Cleared codes and went for a drive - no further MIL showing and problem still not resolved.
Got back and ran VCDS Lite again to get following code
16486 - Mass Air Flow Sensor (G70): Signal too low
P0102 - 35-10 - - - Intermittent
Unplugged MAF at tickover and same issue
My questions are -Has the new MAF failed or d/s to start with given I didn't have a MAF DTC specific before?
Should I therefore get another from a local factors - such as Eurocarparts, and return the one I got today to the eBay seller?
The exhaust and CAT have been changed in the last couple of years, but I think that both O2 sensors are the originals - is it worth replacing these - even though there is no specific O2 sensor fault code, and get a couple of coil packs as a backup plan?
The other potential areas are apparently the fuel pressure valve and the injectors, but my thinking is that I would have the issue everywhere and if I go WOT, then she will accelerate - it's more from start off and normal driving that she hesitates and bogs down.
Any advice or pointers would be gratefully received - thanks in advance guys.
Not sure if this is relevant, but following info also
Control Module - 8D0 906 018 AA
Component and/or version 1.8L R4/5V MOTR 0003
Software Coding 10001
Readiness 0110 1101
Darren
Right, the patient is our usually rock steady reliable Bananamobile, otherwise known as our Y Reg, A4 B5 Avant SE. It's just coming up for 126k miles and has thrown up a running rich code recently, resulting in increasingly poor performance on acceleration and cutting out at idle after initial start.
The initial code was
17545 - Fuel Trim: Bank 1 (Add) System too rich
P1137 - 35-00 - -
T-stat and water temp sensor were changed in the last year, along with plugs and all filters.
No other fault codes present at that time.
After doing a bit of reading, I ordered a new Bosch MAF sensor, which I fitted today. Result - no change! I then noticed that the vacuum pipes at the rear of the engine looked a little perished, so I changed them all for new hose. I also checked connections and sprayed with electrical contact cleaner.
Cleared codes and went for a drive - no further MIL showing and problem still not resolved.
Got back and ran VCDS Lite again to get following code
16486 - Mass Air Flow Sensor (G70): Signal too low
P0102 - 35-10 - - - Intermittent
Unplugged MAF at tickover and same issue
My questions are -Has the new MAF failed or d/s to start with given I didn't have a MAF DTC specific before?
Should I therefore get another from a local factors - such as Eurocarparts, and return the one I got today to the eBay seller?
The exhaust and CAT have been changed in the last couple of years, but I think that both O2 sensors are the originals - is it worth replacing these - even though there is no specific O2 sensor fault code, and get a couple of coil packs as a backup plan?
The other potential areas are apparently the fuel pressure valve and the injectors, but my thinking is that I would have the issue everywhere and if I go WOT, then she will accelerate - it's more from start off and normal driving that she hesitates and bogs down.
Any advice or pointers would be gratefully received - thanks in advance guys.
Not sure if this is relevant, but following info also
Control Module - 8D0 906 018 AA
Component and/or version 1.8L R4/5V MOTR 0003
Software Coding 10001
Readiness 0110 1101
Darren
