Have P0122 & P0336. Any suggestions for this combo. Thanks in advance for your help

Interesting combo... APPS voltage too low and Crankshaft position sensor signal.

Possible A/C noise from the altenator... Possible both sensors are going bad... possible bad ground...

I'd clear the codes and hope they don't come back until you get home

I think these 2 showed up about a year ago, cleared them and stayed away till now. Somewhere on here I think I read that if you disconnect batteries you need to reset apps. I had alternator quit at nite and drove to destination. Next morning batteries were dead. This happened when I first bought truck. Never reset apps. Could that cause this code?

Easiest thing to check, disconnect them and reset it. Is the truck running alright? 

Been back from my trip since Sunday night. Busy with work till last night. Disconnected batteries and replaced crank sensor, hooked up batteries and reset APPS. Engine started right up and cel was gone. Will test drive today. On my trip home, with 150 miles to go, 10:30 pm in a town that was asleep I shut truck off and wouldn't start. Also saw a couple of times tach wasn't working during trip. Wanted to remove crank sensor, but couldn't get starter bolts loose. After an hour it started!

Fill out signature so we can see what truck you have.  on my 01 when tach would quit then work it turne out to be the cam sensor that is under the vp 44.

Don't know how to fill out signature. Sorry

Truck is running great after replacing crank sensor

Low volt code more than likely the APPS rheostat is wearing out. But typically I just reset the code and see if it returns if so the APPS should be diagnosed a bit deep and most likely changed out.

Don't know how to fill out signature. Sorry

 

go to top click on screen name then click settings. Signature will be on left.

Thanks for your help. Put a little in sig.

great to see. Your's is almost the same as mine. Glad running fine, this is GREAT site.