P1128 Code
07-21-2014, 12:01 PM
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P1128 Code
I know there has been numerous discussions on this code, but I would like some suggestions.
I have a 2001 Audi TT Quattro 105,000 miles.
Driving the car back on a 700 mile trip the check engine light came on. The car was running fine. Mileage was around 29MPG. Only thing I noticed was a smell of what seemed like old gas. Got home and checked the code and it was P1128. I reset the code and cleaned the MAF using MAF cleaner. The car started and idled fine, but when I started driving it would get to 3000 RPM and start stumbling and spitting and sputtering. After about 4000RPM it would clear up. Did this for about 25 miles and then started running fine. Stayed running and idling fine for about another 25 miles and check engine light came back on. Same code P1128, cleared the code and spitting and sputtering from 3000 to 4000 RPM started back.
Where would you guys recommend starting without just swapping parts. I don't have access to VAG COM
I have a 2001 Audi TT Quattro 105,000 miles.
Driving the car back on a 700 mile trip the check engine light came on. The car was running fine. Mileage was around 29MPG. Only thing I noticed was a smell of what seemed like old gas. Got home and checked the code and it was P1128. I reset the code and cleaned the MAF using MAF cleaner. The car started and idled fine, but when I started driving it would get to 3000 RPM and start stumbling and spitting and sputtering. After about 4000RPM it would clear up. Did this for about 25 miles and then started running fine. Stayed running and idling fine for about another 25 miles and check engine light came back on. Same code P1128, cleared the code and spitting and sputtering from 3000 to 4000 RPM started back.
Where would you guys recommend starting without just swapping parts. I don't have access to VAG COM
07-27-2014, 05:27 AM
#2
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Get access to VAG-com diagnostics or find someone who has the interface cable. Otherwise take the car to a shop and pay them to repair the car. You will just be wasting time and money without them. Also, the Bentley or Elsa service manual is mandatory.
07-27-2014, 03:27 PM
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^^what he said. The VCDS from Ross-Tech will pay for itself the first time you use it.
Unless you know for certain (as in you have a receipt from PO) that the car has had a fuel filter replacement, I'd start there; cheap, locally available, easy. And necessary maintenance.
There are a WHOLE bunch of potential vacuum leak "trouble spots" that you'll never find without a smoke machine or replacing vacuum tubing. And even if the vacuum leak itself is not affecting the engine, the thing that depends on that vacuum might have a great effect!
Welcome to AW, good luck - and let us know what it turns out to be!
-Tom
Unless you know for certain (as in you have a receipt from PO) that the car has had a fuel filter replacement, I'd start there; cheap, locally available, easy. And necessary maintenance.
There are a WHOLE bunch of potential vacuum leak "trouble spots" that you'll never find without a smoke machine or replacing vacuum tubing. And even if the vacuum leak itself is not affecting the engine, the thing that depends on that vacuum might have a great effect!
Welcome to AW, good luck - and let us know what it turns out to be!
-Tom
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