If the reference voltage is low due to a "poor" battery, it will still throw codes. It takes a while for the alternator to start putting out a higher voltage due to the battery issue with the SAI working for about the first 40 seconds on start-up. IIRC it takes a number of "faults" before it throws a code. If the voltages are low the references will be off.
I also remember other codes for the alarm system being there as well. They are also gone and now the "red clip" works.
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2002 Boxster S Seal Grey
2010 Ford F150 FX4 Luxury
Retired after 38 years with the same company.
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