Engine Performance problem
2000 Chevy Suburban V8 Four Wheel Drive Automatic 132, 00 miles
I have a 200 chev suburban with 132,000 miles. Runs great but do have 2 codes that I read today; both reference PO420, my OBD reader reports "Bank 1 Catalytic efficiencey below threshold. I did have a couple other codes (PO171, PO174, Po300) but those are clear now that I replaced the mass air flow sensor.
have the same problem?
Saturday, March 15th, 2008 AT 11:40 PM