riddle family

Wouldn't I get a CEL if I throw a code?

I replaced the FCA two weeks ago but the thing came back yesterday. The truck started to idle up and then all of a sudden a surge happened. Turned her off and did the key swithc code check it read p0251. Had here cleared at the local auto store and drove a few miles back home. Wouldn't the code come back if it was bad?

Thanks,
Dwight

riddle family

Bump....

DDK911

My truck threw the code twice it has only happened this winter. i talked with a cummins mechanic and he said that its because its cold ive never had an issue other than when it was real cold. i added a plug for the block heater and started using it an time its in the 30s or less and have not had issues since. the mechanic also told me if i got the high idle ingaged and used it every time i started it in cold weather that it would prevint it to. hope this helps.

riddle family

Well, I just threw the code again. If I didn't know the key code trick I would have never known it did it. Truck runs fine, no smoke, no wierd idle, has power. Gonna take a look at the wires to see if they are bad or the connectors are getting a good connection.

Now my question is if throwing this code is bad why no CEL? I am under the impression that a bad FCA can ruin a lot of things. How would a normal person who isn't **** about checking things like this supposed to know if something is wrong???[\

Please help