Trouble Code Definition

2002 TOYOTA HIGHLANDER
126,500 MILES • 6 CYL • 2WD • AUTOMATIC
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MBFETSKO
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I have a 2002 Toyota Highlander (V6, 2WD) with a Check Engine Light activation. The OBD-II scanner shows only one code - P1155; the description I have been able to find reads "A/F Sensor Heater malfunction Bank 2 Sensor 1". My Haines Manual has proven worthless to me.
I would like to know exactly what this means, where the sensor is located and if this is something that I can address myself?
Jan 8, 2011 at 1:38 PM
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WRENCHTECH
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It means the heater is not working on the 0/2 sensor for Bank 1 upstream. That is usually a bad sensor when only one of them codes.
That would be the upper sensor on the driver's side.
Jan 8, 2011 at 2:20 PM
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MBFETSKO
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Just to make certain we're both looking in the same location... this sensor is the one on the manifold closest to the radiator and obviously visible?
Jan 8, 2011 at 3:53 PM
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WRENCHTECH
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As I said, it's the sensor before the converter on the left side of the engine.
Jan 8, 2011 at 3:59 PM
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MBFETSKO
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Thanks for the confirmation!
Jan 8, 2011 at 4:10 PM
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WRENCHTECH
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Closing out question
Mar 11, 2011 at 8:33 AM
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