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Old Aug 5, 2020 | 11:02 PM
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Originally Posted by aaronc7
I think 2004/P59 PCM is the only year where the heater circuit is indeed grounded by the PCM. I put a P59 in my 2003 and had to disable the O2 heater codes.
Yes !!...just looked at Service Info for an ‘04 and indeed the heater circuit is ground side switched !!
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