Quote:
Originally Posted by JFP in PA
Maybe, or maybe not. P0139 is indication of an aging (read dying) sensor behind the three way cat on bank 1-3. That said, P0140 is indication of an interruption of signal from the same sensor, which is often a wiring or connector issue.
I would use the Durametric to read the voltages for the sensor to see if they are in range, if they are, you may want to check its harness for problems.
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Aren't the faults for two different banks?
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