Check:
1.- PCV vacum hoses
2.- Engine oil cap looseness.
3.- rocker cover gasket
It could
yes
Yes, that is one of hundreds of possibilities.
Yes, that is one of hundreds of possibilities
Interesting question. If the car's engine cause the car to reach the speed of sound, causing a shock wave, then the engine did indirectly cause a shock wave. The engine itself creating a shock wave however, is highly unlikely if not impossible. The moving parts in a typical combustion engine do not get anywhere near the speed of sound and any car that would reach the speed of sound would most likely have a jet engine like Thrust SSC.
My guess is it will causes the engine to surge and change engine speed up and down over and over because the ECU (computer) is searching for the right idle speed, but the bad sensor isn't sending the signal. It could also possibly cause the engine to just idle at a higher speed than normal.
An engine usually has a higher idle speed when the ac is running. If the high speed idle does not operate then the ac will cause the engine to stall.
lots of reasons this could happen, more than likely a speed sensor has went out
The speed sensor is located on the top side of the rear end housing.
input-turbine speed sensor circuit malfunction
Could be EGR Valve.
A flashing check engine light indicates a engine condition that could be causing severe catalytic converter damage. The usual cause is a harsh misfire. The engine computer will have set a code, or codes that will help in diagnosis.