Why does my engine shut off.

Tiny
BOB STUDWELL
  • MEMBER
  • 2006 MERCURY MARQUIS
  • 179,000 MILES
Driving at any speed, at any time of day, at any engine temp, cool or normal, up or down or on level ground, accellerating or decellerating or cruising at any speed, even on highway in cruise mode, just driving normally and minding my own business, the engine will shut off with no warning or indication of a problem. I can put car in neutral and coast, then turn off key and then restart the enging and put it back into drive and go again as if nothing happened. This may happen after 2 - 3 min of driving or up to 45 + min of driving. Engine code read out says
"TAC module processor, pd, The book doesnt tell me anything I can do to fix this problem nor what it means. Help me please
Friday, October 7th, 2011 AT 9:20 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You have a fly by wire system that is malfunctioning. The code number indicates the system failure, never the defective part. You need a shop to find out if it is wiring, throttle body motors or the pedal sensor with the tac module.
Any of these parts are expensive. If you throw parts at it and your wrong, you own the parts anyway.
Get it checked at a shop.

Throttle body is about 1100
tac module is about 600-750

Roy
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Friday, October 7th, 2011 AT 9:52 PM

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