MCCOY64

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Question Asked: how to clear 3 codes on 99 chevy Silverado ls 5.3?
August 31, 2013, 03:37 AM
obd codes came up on my truck po-137. 02 sensor circuit ,low voltage bank one-sensor-2, im pretty sure I need too replace that sensor, what I was wondering is I got 2 more codes that came with. po-420 and po-430, saying catalyst system efficiency below threshold bank-1 which is the 420 code and the same reading for 430-bank -2 anybody got any info on what I need to do too clear them codes? thanks
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