Mechanics

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?

2000 Chevrolet Blazer • 141,000 miles

2000 chevy blazer 4.3.
Avatar
Cg02
January 16, 2012.



Those are all O2 sensor circuits. See if the wires leading to them have been burnt from touching the exaust pipes.

Hmac300
Jan 17, 2012.
Is the one of the 02 sensor circuits located behind the catalytic converter and is the other one by the exhaust manifold?

Tiny
Cg02
Jan 17, 2012.
Yes, one inf fornt and one in back of both converters. Bank 1 is left side bank 2 right

Hmac300
Jan 17, 2012.