Temp sensor keeps going out, changed out fan, new temp sensor new air flow sensor. Code = 171 & 420, o2 sensor ?

Michael Brazile

Asked by Jun 23, 2014 at 02:55 PM about the 1996 Oldsmobile Achieva 4 Dr SL Sedan

Question type: Maintenance & Repair

1 Answer


Sounds like an exhaust leak is pulling fresh air in past the oxygen sensor. HTH. -Jim

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