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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Is the O2 sensor heater circuit fuse protected?



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      11-15-2010, 01:09 PM   #1
c4s335i
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Is the O2 sensor heater circuit fuse protected?

In a previous post I stated having trouble with the ecu throwing a DME code for all 4 heater circuits. Since the heater circuit is the only car supplied power circuit to the sensor, is it possible that the heater circuit is fused and no power is getting to this circuit? If so, anyone have a clue where to look?

I'm thinking that my shorted o2 sensor wire could have somehow shorted the entire heater sensor circuit. Didn't think this was possible, but it's starting to seem like the only alternative.
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      11-22-2010, 01:53 PM   #2
c4s335i
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Answer is yes and it's in the glove box fuse box.

Last edited by c4s335i; 11-23-2010 at 06:19 PM. Reason: image
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