service engine code p0420 and smelling gas(fuel)
ive been smelling fuel inside the cab of my car. and a engine code of p0420 appeared like a few days later. what on earth could be wrong?
2002 oldsmobile alero GLS |
id like to add that my cat was replaced a year ago due to a clog
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Try reading this:http://http://www.obd-codes.com/p0420
The rear O2 sensor is only used to check cat function, it doesn't affect the fuel-air mixture. That is the job of the front O2 sensor. I would look for an exhaust leak first since that is a dangerous condition if you have one. |
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