no. the post cat o2 sensor only monitors the efficiency of the cat.
Yes, it can run but this will destroy the O2 sensor and the catalytic converter.
Protects, no. The only temp sensor is the coolant temp sensor. The car will run until the engine is ruined if allowed to continue overheating.
Yes, you should always run your vehicle with its Knock sensor.
yes it will not only lose power it will run rough in some cases not run at all
Hmmmm ...... there are only two. One post Cat converter and is very obvious from under the truck. The other one on the exhaust manifold (pre-cat). www.trailvoy.com - Trailblazer forum run by true enthusiasts!
Pre-cat, probably run poorly and may lead to damage to the catalytic converter. Post-cat, nothing.
Run, yes. Run properly, no.
No it will not cause it not to run.
crankshaft position sensor
The crank sensor sends a signal to control the spark timing to the engine. If the sensor goes bad the engine may run rough or not run at all.
disconnect your exhaust between the per and post oxygen sensor give it gas if it runs well change catalyst converter
Get a tune-up ... change plugs, etc etc. The MAP sensor was probable only part of the problem.