Question about 2000 Toyota Avalon

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The check engine light produced codes p1150 and p1155 on a 2000 toyota avalon xls.

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All cars sold in the US after 1995 use the same on board diagnotics called OBD-II. The codes are the same. Search OBM-II error codes and you'll get a listing.

P1150 Air/Fuel Sensor Circuit Range/Performance. (cylinder bank 1 Sensor 2)

P1150 may mean that one or more of the following has happened:
water or corrosion in the O2 sensor connector, loose terminals in the connector, wiring burnt on exhaust components, open or short in the wiring due to rubbing on engine components, holes in exhaust allowing unmetered oxygen into exhaust system, unmetered vacuum leak at the engine, bad O2 sensor or bad PCM.

P1155 Air/Fuel Sensor Heater Circuit. (cylinder bank 1 Sensor 2)
P1155 may mean that one or more of the following has happened: O2 Heater element resistance is high, Internal short or open in the heater element or O2 heater circuit wiring high resistance

Solution :Replace oxygen sensor and see if the problem goes away.

Posted on Nov 17, 2009

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These codes are the air/fuel ratio sensor it takes the place of the oxigen sensor. Replace it after finding out wich one is the sensor at fault. Bank #1 sensor #2. This would be the sensor after cat. conv. on the bank containing cyl. #1

Posted on Nov 17, 2009

Testimonial: "My sheet said bank 2 sensor 1 but that could be wrong. I read a number of blogs from different sources and replacing the sensor doesn't always fix it."

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