Code P1155 On 2001 Sienna, what is it?

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Code P1155 On 2001 Sienna, what is it?

Info I have so far says A/F sensor heater cicuit malfunction (bank2 Sensor1). Is this a oxy sensor bad?Might it be something else?

2007-02-11 12:56:44 · 2 answers · asked by child_of_the_lion 3 in Cars & Transportation ➔ Car Makes ➔ Toyota

2 answers

This PDF covers it better than I could in the space provided here.

http://www.autoshop101.com/forms/h37.pdf

2007-02-11 13:06:07 · answer #1 · answered by KirksWorld 5 · 0⤊ 0⤋

It's the sensor on the exhaust manifold close to the radiator. It's telling you the heater circuit in the 02 sensor or something associated with it failed. Usually the O2 sensor itself causes this .

2007-02-11 21:13:52 · answer #2 · answered by Carman 3 · 0⤊ 0⤋