My 02 Bravada is throwing a P420. Live data for the oxygen sensors show sensor "mirroring" where both sensors follow the same trend. it still does 19 mpg on highway and I don't think I have any issues with reduced power.
1) How do I know if the catalytic converter is bad or clogged, or of the oxygen sensor is bad
2) What engine problems can cause the cat to die on the 4.2L vortec?
3) Can I cut the old cat out and just clamp a new one on?
1) How do I know if the catalytic converter is bad or clogged, or of the oxygen sensor is bad
2) What engine problems can cause the cat to die on the 4.2L vortec?
3) Can I cut the old cat out and just clamp a new one on?