Dealer checked the computer and said MAP/IAT sensors were bad due to low voltage. Got new sensors and a scan tool today. Can't clear codes and it's snowing 1-2" phr here. I have 45 driveways to clear.... Any ideas are welcome. HELP

 

It would be most helpful if you were to indicate what year truck you have as well as what the codes are/were and what scan tool you have as well if you would like people to be able to answer your questions.
Also, you can usually get your local autozone to clear the codes for you with their scantool, at least in my parts anyway.
Mishkaya

 

Please fill out your signature.

 

You can drive it without clearing the codes, can't you? If so, you can do what you need to do and get the clodes cleared as soon as it's convenient.

Chris

 

Every once in a while, mine will set a code and turn on the check engine light after a cold start where the heaters were on. If the batteries are not full charge this can happen. You have a scanner you said. Start it up and get it warmed up, shut it off and clear the codes. Then start it up and see if they reset codes again. If not it is just the low voltage from starting with the grid heaters on. Maybe your batteries are just getting weak.

 

You should try to get the cummins bullitin # 3666480 thi is the wiring diagram for our truck this is far better than the cryslurr stuffffff.what these goes into is pin 11 but there is a 6 wiring junction before the pin 11. this could be the problem sorry don't know were it is.Can you measure the votlage on the two pins of the connector? Would be a good time to get a multi-meter. Your preference digital or analog.And do save the old ones because suspect that they are good mine are all the same resistance.