Oxygen Sensor Heater Circuit Malfunction P0161, P0141, P0155, P0135. How to diagnose and fix.

This video offers an explanation of how to investigate and fix a vehicle with a check engine light that arises as a result of a problem with one of the oxygen sensor heater circuits. This problem applies to vehicles with OBDII trouble codes P-0161, P-0155, P-0135, and P-0141. Basic jargon is discussed, and a method of systematically proving the diagnosis is shown, to be sure you are replacing the correct part. Various diagnostic pitfalls are discussed.

This is an amateur presentation, offered in good faith, for free, but with no guarantees as to accuracy or safety. Never rely on a single source for critical information, and read widely from multiple sources before committing to a pathway. Auto repair comes with inherent danger. Be sure you have the skill set and experience to tackle this kind of job before proceeding. Any misadventure you encounter if you decide to accept the risk of DIY repair is your responsibility.


Music at the end is “River Meditation” by Audionautix is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/...)
Artist: http://audionautix.com/