Well, The check engine light comes on to day.. Took it to Autozone for a diag test.. Say code is po155..

Asked by May 02, 2014 at 07:43 PM about the 2004 Chevrolet Cavalier LS Sedan FWD

Question type: Maintenance & Repair

Take it to Autozone for a diag test.. Says it may be the gas cap. Try that first he says.. If not, get a smoke test on the fuel system as it is losing compression fast on start up. I look up the code and it says O2 sensor. Any suggestions??

1 Answer

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Yes, P0155 is either a failed O2 sensor or the wiring harness or connector to the O2 sensor is faulty....http://www.obd-codes.com/p0155

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