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[Jones]

Does sound classic crank sensor problem - fail when engine heated up.

The 31 should disappear once engine has done a few revs at above 23rpm, but never had one to test this theory.

Paperclip purely only does engine ECU on Omega.

Thanks for the reply.

Mine never did show up error 31 when i did the paper clip test only 57 was wondering if i did it correctly do you have to keep the engine turning over has soon has you start the paper clip test

[Admin]

My initial thought when I first read this thread was the crank sensor, but usually this does log a problem.
Try running the paperclip test with the engine running.

Easy enough job to change the crank sensor.