I have a 99 a4 2.8. The engine light came on and I pulled 4 codes. I would appreciate any help or explanation. The codes are p0332, p0455, p0118, p1138 thanks.

 

P0118 coolant temp sensor or wire short to ground
P0332 insecure/poor wiring connectionknock sensor bank 2

[hr]
P1138 long term fuel trim, idling bank 2 ( probably caused by the other problems ).

edit: P0455 large leak detected EVAP system

 

So I'm possibly looking at an electrical/wiringproblem. I'll check wiring around coolant reservoir. What else should I look for.

 

the last code is the most important ( large air leak ) and probably responsible for the rest so check all the pipes to the intake and from the EVAP purge valve

 

thanks for the info. I'll check all lines, hopefully I'll find something.

 

where is the evap purge valve located?

 

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P0455 > Gas cap loose

 

i recently had the fuel trim code after an inspection. i repaired 2 vacuum hoses that were cracked and the problem was solved. look over all hoses for cracks, loose fit etc.