I have a 97 Plymouth Grand Voyager that will periodically stall then erase any codes that have been set. If I'm moving fast enough the engine will restart itself but if I'm moving slow (coming to a stop or turning a corner) the engine will not restart itself. It will restart manually without a problem.

When moving fast the engine will stall, shutting of the cruise control, restart itself in approx 1 second, then turn on the SES light for approx 1 second then continue on and run perfectly.

This sequence will usually repeat once every 35 to 60 miles and usually (but not always) in the morning.

I've taken it to the shop and they say that the computer is resetting itself as if the battery has been disconnected. They replaced the positive battery terminal that was corroded but the symptoms persist.

Any ideas?

Three possibilities, cam position sensor, crank position sensor or engine computer. I would change the crank position sensor first as it may or may not throw a code when it is going bad. That may be why the code is clearing itself so rapidly.

Three possibilities, cam position sensor, crank position sensor or engine computer. I would change the crank position sensor first as it may or may not throw a code when it is going bad. That may be why the code is clearing itself so rapidly.


Thanks for the feedback. I knew the crank position sensor might not set a code but I didn't think that is would actually erase codes.

The shop I go to has a system call "co-pilot" that attaches to the OBDII port and records code history. It can also take a snapshot of the computer inputs when the van stalls by just pressing a button. When they tried to install the co-pilot into my van they couldn't get it to work properly. Do you think that a faulty crank sensor could cause a problem with the OBDII connection to my van computer?

I'm beginning to think that it might be the computer itself or something in the diagnostics is shorted to ground.

The cps should have nothing to do with the connection to the computer but it will cause the van to shut off while driving.

The flashing light you are getting may actually just be a misfire and not an actual code. On some vehicles the light will flash a couple of times before setting a code if there is a misfire. That may be what you are seeing and that is why there is no code in the computer especially since it shuts off right after the light flashes.