I got this 98 federal certified chevy truck 1500 yesterday and when checking monitors i noticed 5 said not supported and just 3 continuous were and 1 catalyst monitor after the tailpipe test i did not ask for an obd2 test, are some of these non obd2? it was a truck not a motorhome
What was the weight on it? May be the weight was entered in incorrectly?
I never heard of a Chevy pickup that is Federal certify that bypasses the ODB functional test before. I know on Ford Federal Certification Trucks/Vans that are 8000+ GVWR bypasses the OBD automatically.
I was told, the federal cert vehicles on the Fords, there is no oxygen sensor after the cat to monitor it catalyst efficiency