I was woundering if anyone has experienced a P1336 code and what steps where taken to correct the problem.

I have a 91 GMC pickup, I just transplanted a 5.3 engine out of a 2003 pickup. The computer was flashed as a 2002 after a few minor problems with the O2 sensors everything seem to be working OK until recently when this new code manifested.

Any help and or input on this will be greatly appreciated!

 

You need to do a CKP(crank sensor) variance relearn w/a tech-II or other scan tool capable.

 

Wrencher,

Thanks for the advice, sounds simple enough! now to find a scan tool.