Question about 2001 Toyota Highlander
Actually P1155 is pointing to a fault with the internal heater for the
A/F Sensor (aka Oxygen Sensor) for Bank 2 Sensor 1. The PCM uses this
internal heater to get the sensor to normal operating temps within a
matter of seconds on cold starts. Replacing this sensor should solve
your problem. This sensor is located in the front exhaust manifold.
Posted on Aug 07, 2010
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Posted on Jan 02, 2017
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