OT bad O2 sensors?

[micky]

OT

If a car doesnt' start, can you tell that its O2 sensors are no good?

If all 4 O2 sensors are no good, is that enough to keep a car, some car, from starting?

Hypothetical

[trader_4]

You could read the codes and see if codes are set for the sensors. That would be an indication, but it could still be bad wiring, etc.

No, but I suppose it's possible there could be some screwy car made in Belarus or someplace that works like that.

[Terry Coombs]

No .

[danny burstein]

Reality: yes. For some _very small, very minscule_ number of vehicles.

Very roughly 20 years ago there were some trucks [a] that were designed so that... if some of the EPA mandated and other sensors gave ugly readings, the vehicle would not start.

This garbage ended prety quickly.

[a] I was involved with EMS ambulances that were built on various truck chasis. I seem to recall Ford F-250 but could easily be misremembering the specific models.

It's possible (I had no personal experience with any) that some cars had similar stupidity.

Anyway, Ford provided us with a "defeat" switch so that if the EPA'ed "do not start" function activated, we could manually override it.

[micky]

Very good of Ford.

Thanks all. This was another Pipple's Court, where a shade-tree mechanic claimed it woudlnt' start because the owner didnt' pay for new

02 sensors. He had said what he would do and he didnt' a very good job on that stuff either.