2000 chevy blazer 4.3. The service engine light is on and I got four codes PO135, PO146, PO147, PO155. What do these codes mean and what do I need to do to get the service light to turn off so I can inspect it?
January, 17, 2012 AT 12:20 AM
Those are all O2 sensor circuits. See if the wires leading to them have been burnt from touching the exaust pipes.
January, 17, 2012 AT 12:59 AM
Is the one of the 02 sensor circuits located behind the catalytic converter and is the other one by the exhaust manifold?
January, 17, 2012 AT 1:05 AM
Yes, one inf fornt and one in back of both converters. Bank 1 is left side bank 2 right