Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!
Hello, I have a 08 Silverado 1500, 4.3, setting codes P2270 and P2272 and P0420. The downstream 02's (which are new) go as high as 890mv when I induce propane. The converters, especially bank 1, have almost no oxygen storage capacity. Is it possible for the worn-out converters to be causing P2270 and P2272? Normally I don't expect a converter to set an 02 code like this but I could be wrong?
1 you might have bad up stream o2 sensor or sensors
2 exhaust leaks 3 bad or dirty ma f sensor or 4 bad injectors. depending on the readings of your o2 sensors good luck
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