check eng lite on 1997 Toyota Avalon

had a scsn said o2 sensor sensor 1 bank 1,replaced sensor about 2 wks ago,lite went off 2 days came back on. scan also said heater circuit malfuntion.

by in Florissant, MO on July 31, 2009
2 answers
ANSWER by on July 31, 2009
Check for vacuum leaks for starters. Exactly which sensor did you replace? Was it the front or the rear? Does the code give you any more information?
ANSWER by on July 31, 2009
Bank one on that engine is the rear bank of cylinders ensure the correct sensor was replaced. Heater circuit failure is common on these cars.
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