Thread: Disco 4 tdv6 2.7 year 2011 looking for crankshaft sensor location

Originally Posted by loanrangie

Aren't codes meant to clear after a certain number of shutdown/restart cycles ?
Or maybe after a hard rest.

Not really, but it depends on the code and the ECU.

On newer stuff there will be current faults and archived faults from a previous drive cycle, usually the old stuff stays there until cleared.

On the Bosch TCU I've done work with, faults will get cleared after a certain amount of starts or if it runs out of room to store them and a more critical fault gets logged, but that's pretty ol_skool now.

Originally Posted by loanrangie

Aren't codes meant to clear after a certain number of shutdown/restart cycles ?
Or maybe after a hard rest.

Originally Posted by shack

Not really, but it depends on the code and the ECU.

On newer stuff there will be current faults and archived faults from a previous drive cycle, usually the old stuff stays there until cleared.

On the Bosch TCU I've done faults will get cleared after a certain amount of starts or if it runs out of room to store then and a more critical fault gets logged, but that's pretty ol_skool now.

My only experience was a couple of years ago where I used the Nanocom to clear some fault codes and they were not shown again vi a check with the Nanocom. When I asked the Indy about something he gave me the printouts from his Autologic and it showed the one I had cleared as an historic fault.

What that means -