Multiple codes intermittent limp mode

[Jason Norris]

2009 Sierra 2500hd has an issue where it throws multiple codes intermittently.  It then goes into limp mode.  The codes are:

P0016 CRANKSHAFT POSITION AND CAM POSITION CORRELATION

P0068 THROTTLE BODY AIRFLOW PERFORMANCE

P0101 MASS AIRFLOW SENSOR PERFORMANCE 

P0106 MAP SENSOR PERFORMANCE

P0513 THEFT DETERRENT KEY INCORRECT

 

I wouldn’t expect all these codes at once.  With the key code, is it possible that it’s misreading the key and the limp mode is a result of that?  Would the limp mode cause the other codes?  This seems way more involved than just a simple sensor.  I’m familiar with all the sensors and what they do but no idea why they all come at once.  Possible bad ecu?

[richard wysong]

Probably a bad ground, look at a wiring diagram and see if those components share a common ground

[Jason Norris]

Thanks.  I’ll search for one online.  I don’t have a service manual for it.  

[Jason Norris]

I found one and they don’t seem to share a common ground but I could not be understanding the diagram 

[MORSNO]

I had a crank sensor fail on my previous pickup, when it fails the truck will shut down or run intermittently and will cause the other sensors to read wonky.  Edit: It always would shut down when the engine was warm after about a twenty-minute drive.  If I let it sit it would restart when cool.  

Edited March 29, 2025 by MORSNO