Question about 1998 Volkswagen Jetta
I have a 2002 Jetta GLS 1.8 Turbo. I have 5 error codes. Please help!
P0420, P0300, P0301, P0172, P2181.
All spark plugs and coil packs have been replaced.
Catalyst System Efficiency Below Threshold Bank 1
P0300=Random/Multiple Cylinder Misfire Detected
P0301=Cylinder 1 Misfire Detected
P0172=System Too Rich Bank 1
P2181=Cooling System Performance
you need to write these down,have someone clear the codes in the car,then go for short ride and recheck which if any code reappears.it's like domino's affect,one sensor can start a chain affect with the others.
Posted on Dec 10, 2009
Check the performace range of the up stream O2 sensor. A bad O2 snesor will set the code P0172, P0420 and possible misfires on the cylinders (to rich), to much fuel in the cylinders. The P2181 could be caused by a bad temperature sensor or a faulty thermostat. I would go for the temp. sensor or the thermostat first, clear the codes and then drive the vehicle and see if any other code sets. If it does then check &/or change the O2 sensor if faulty, burned out or has slow response.....
Posted on Jan 14, 2010
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Posted on Jan 02, 2017
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