Help diagnosing problem on 2000 S4 76k mi
#1
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Help diagnosing problem on 2000 S4 76k mi
My CEL is on with the following codes:
17544-Long Term Fuel Trim Add.Fuel,Bank1 System too Lean
17546-Long Term Fuel Trim Add.Fuel,Bank2 System too Lean
17521-Bank1-Sensor1 Internal Resistance too High
Searching the archives it seems it could be caused by the following:
Water Temp Sensor
O2 Sensor
MAF
What course of action does Audiworld suggest considering the model and mileage (btw - all parts are the original factory installed)
Clean MAF? (seen DIY instructions on this somewhere)
Replace Water Temp Sensor?
Replace O2 sensor? (any DIY tips?)
17544-Long Term Fuel Trim Add.Fuel,Bank1 System too Lean
17546-Long Term Fuel Trim Add.Fuel,Bank2 System too Lean
17521-Bank1-Sensor1 Internal Resistance too High
Searching the archives it seems it could be caused by the following:
Water Temp Sensor
O2 Sensor
MAF
What course of action does Audiworld suggest considering the model and mileage (btw - all parts are the original factory installed)
Clean MAF? (seen DIY instructions on this somewhere)
Replace Water Temp Sensor?
Replace O2 sensor? (any DIY tips?)
#7
Put a new passenger front O2 sensor in and a new (refurbished MAF) - then call it a day....
You can get both pretty cheap and your codes should go away.
Never heard of a coolant temp sensor throwing those codes.
Never heard of a coolant temp sensor throwing those codes.
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#8
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Yes, 2000 MY uses Bosch MAF
I don't think my version of VAG-COM supports logging. (I am running an old "dumb interface" version because it's such a PITA to upgrade).