2003 Dodge Grand Caravan Q&A
2003 Dodge Grand Caravan Question: O-2 sensor- How important is it?
The O-2 sensors wires were inadvertantly torn off by an inept mechanic while doing something else. He does not own up to doing it. Ive taken it to a muffler shop, but they couldn't get it out. It's way back behind the engine in the exhaust manifold and inaccessable. Looks like a lot of stuff would have to be removed (engine dropped?). Sure a dealership would charge arm and leg for. Car seems to run ok without. I'm told it will start to run rough, use lot of gas, damage engine etc. How important is it to repair? I know it continually adjusts carb to keep gas/oxygen ratio correct. If I understand correctly, the carb. stays set like it was at time it was made disfunctional. I've been thinking about not having it fixed. It seems to run fine. - jdo
The fuel injection computer needs this sensor to help determine the amount of fuel to inject into the engine, and if the sensor is disconnected you will have issues, perhaps small and unnoticeable at first but it will eventually turn on the check engine light on, and fuel mileage will suffer. - Bret Bodas
sure it can get damaged. obd II has the ability to substitute a known good value to make the car run when there is a critical failure. it does not last forever and you will do further damage by not fixing it. why not persue your inept person and get it repaired. Roy - mastertech6371