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      12-13-2016, 06:47 PM   #10
5tony
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Drives: '21 M5/'15 X5 35i/'88 M3
Join Date: Jul 2010
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Quote:
Originally Posted by Wires View Post
There is nothing to "clean" on an O2 sensor. The car is 8 years old, the sensor is dead, just swap it.

It has a perpetual heater that runs to keep it at constant temperature. Stuff like that doesn't run forever.
Agree. The heater circuit is part of the sensor and wiring itself. Just replace the precat sensor. Might as well do both while you're at it. The other one is likely to fail soon too.
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