Backdoor password

I meant it this way...
When someone has a problem, the more they post, the more help they get.
So saying that the lights are flashing, sensors got replaced, and so on initially, would have been a lot easier. Thus pulling hens teeth for information
I bought a used engine from a truck, and had my local FL dealer look up the history of it. They found the company name, all dealer work carried out on it, full specs, and so on.
I am still lost as to why the mechanic can't pull codes though. I have a generic HD code reader for ABS, engine, trans, etc codes on big trucks, and it has never asked for a password. I cant change speed, power, and so on with it, but for codes it is priceless.

Martin

 

What I seen here was there are of some of us who know what we don't know, then there are some who just don't know what they just don't know. THEN THERE ARE SOME WHO CAN'T READ BETWEEN THE LINES AND CALL PEOPLE RUDE, ALL THE WHILE THEY ARE TRYING TO GET THEM TO READ BETWEEN THE LINES. Perhaps if we asked the OP to give us the last four digits of the person's social security number driving the last vehicle they seen, even though they could identify the particular vehicle type they were driving, then maybe they could relate too what we're trying to relate. Then there is the problem of passwords for code troubleshooting, something's rotten in Denmark. I guess I will be called rude and not nice again, oh well, I probably won't sleep tonight until I close my eyes. GEEZ, what a rude bunch of ruffians we are.

 

And I have the infractions and "points" to prove it.....All the time while attempting to help someone. Oh well. I think the OP got the point I was trying to make, which was please oh please give ALL possible relevant information at the start!
My posts may be long winded when I ask for help, but I ensure that ALL information is available, including the background etc, to aid those that will try to help me.
Martin

 

Cam sensor will not cause a shutdown light, only an amber warning light. I know it sucks not getting your load out, but you're throwing money away guessing and changing parts without properly diagnosing. You're also messing around with a lot of stuff that if not done right, could make a tech take longer to straighten out, costing more money. I think you have the bite the bullet on this one and wait for the dealer to get you in.

Only 2 batteries is not the issue, it will be an issue in the middle of winter when you try to start it, but once it's running, the alternator puts out enough to run everything on the truck while recharging the batteries.

 

Is it all the time at 1400 as in sitting still or within five min of leaving or after its been running a while.
Whats the temp guage say when it first comes on?
Again what year make and model is the truck?