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i have a 97 ford explorer and a good code tester the p0161 o2 heater circut bank 2 sensor 1,p0135 o2 heater circut bank 1 sensor 1,p0141 o2 heater circut bank 1 sensor 2,o2 heater circut bank2 sensor 1. every time i check it goes from yellow to red on the emission light on the code checker, as well as eractic it idles fine sometimes cold other times it idles realy ruff warm.
