Here is what I did so far to try and find my limp mode problem. Took off negative battery connecter. Unplugged every electric connecter I could find and sprayed cleaner on all. I even put on a new crankshaft sensor just in case. I had no p335 code, but did it anyway. Just took out the 2 13mm bolts and pushed it aside. Gave enough room to take out and install new one. Still in limp mode. Still have p651 code. I give up.

 

Remove the engine cover and take/post a picture of the wiring harness to the throttle body.

 

I took several pictures. I'll try and up load them, however I really don't know how to do that. Maybe my Granddaughter can help me when she comes over today.

 

Resize the pics with ms paint, then upload. There's a way to teach an old dog new tricks.

 

 

Green wire appears burnt. Take a close look/feel to make sure wire is still intact inside insulation.Wiggle to see if message disappears. Make sure to loom/protect the wires after repair. GL

 

Temperature range -30° to 200° Fahrenheit here>>>3/8 in. x 10 ft. Protective Wire Wrap

 

I will take a good look at the wires today. Yea they should be wrapped . Harbor Freight is close by. Thanks ever so much.

 

Just finished checking the wires. They are all good. I have the High temp wire wrap I found in my stuff. Wires are all wrapped up. Maybe the gas pedal is the problem. I've read somewhere that can cause limp mode. I buy things from Rock Auto. They have GM parts and after market parts. I always buy OM parts for whatever I working on. Replacing the gas pedal and the complete throttle assembly is about $400 bucks for the H3 Alpha. But would it solve the limp mode? I hate to throw money at it and still be in limp mode. I've reached the end of my expertise. It may have to take a trip to the dealer. I hate to do that. They jack up the parts price. What to do?