Join me in troubleshooting this BMW with a 299F/ P0140 B1S2 oxygen sensor no activity trouble code! I cover some fundamental oxygen sensor testing techniques that can be applied to many makes and models, (not just euros!). Some topics covered include....
Oxygen sensor testing
Signal circuit integrity testing
O2 heater circuit testing
Using scan data to identify O2 sensor orientation
Thanks for watching Triangle Diagnostics!!!
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