p1137 code
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Audiworld Junior Member
Joined: Aug 2009
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p1137 code
i have a 2000 a4 1.8 engine-keep getting p1137 code.i have checked for vacuum leaks and cleaned the maf sensor.clear the codes and about every 300 miles the code comes back.about when i fill the tank(maybe coincidence?) i just have a scan tool but got these readings 800 rpm,load value 3.5% coolant temp 167 short term fuel trim -4.9% long term 21.0% short term fuel trim -100.6% long term -100.6% 0mph fuel system closed.can someone please point me in right direction? thanks
Audiworld Junior Member
Joined: Aug 2009
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Do you have a K&N, or other filter that you apply oil to? If so, too much oil can cause it to coat your maf requiring re-cleaning.
An overly rich fuel condition could also be caused by a bad or failing EVAP purge valve. Being tied to the fuel tank for purging vapors, if the problem truly is related to when you fill up, I could see this being more likely.
Lastly, a faulty O2 sensor after the cat could cause a rich condition.
A VAG-COM would probably be your best tool in further diagnosing the last two possible causes.
An overly rich fuel condition could also be caused by a bad or failing EVAP purge valve. Being tied to the fuel tank for purging vapors, if the problem truly is related to when you fill up, I could see this being more likely.
Lastly, a faulty O2 sensor after the cat could cause a rich condition.
A VAG-COM would probably be your best tool in further diagnosing the last two possible causes.
AudiWorld Member
Joined: Dec 2002
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It sounds similar to a lean code I kept getting. It was intermittent. The vacuum lines were recently checked with smoke injected into the intake at my local Audi specialist, so hoses were OK. I eventually logged the MAF readings with a VAG-COM (WOT in 2nd gear method) and only got 90g/s close to redline. I tried cleaning the MAF in some 70% IPA - rubbing alcohol -- but it did not do much. The post-cleaning readings were only about 96g/s. I ended up buying a new MAF and swapping it in. The new MAF read ~160g/s. Pinging went away, and more upper end power is back!! I'll try cleaning the old MAF with some MAF cleaning later to use as a backup. 
In my case, the MAF was just working just enough to not be a problem except when a little throttle was needed. I got some pinging under heavy throttle ~4-5.5k, but I never spent time looking into it. It's been driven like this for over a year -- the new MAF makes it feel like a new car again.
In my case, the MAF was just working just enough to not be a problem except when a little throttle was needed. I got some pinging under heavy throttle ~4-5.5k, but I never spent time looking into it. It's been driven like this for over a year -- the new MAF makes it feel like a new car again.
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