Ok guys,
Been lurking around here for more than two years (before I bought "the" truck).
You guys are all so full of...information and I need some help.
Checked codes tonight (check them about every three months) and got a P0514.
I've looked everywhere I can think of on the wonderful internet and did a search here, but can't find it. Anyone have an idea?
Thanks

 

not sure what p0514 is, but here is a pretty good list of the OBD2 codes... [i didn't see the p0514 there ]

 

The code P0514 shows:

P0514 GENERIC Battery Temperature Sensor Circuit Range/Performance

Not sure what it means,

If you go to this site and register(Free). This database has the most comprehensive code base that I have found so far.

http://www.gendan.co.uk/codebank/login.php

ON EDIT:

BTW p0514 code is in the odbii codes in the tech faqs on this site.

 

Thank you gentlemen. I have no idea what "GENERIC Battery Temperature Sensor Circuit Range/Performance" means, but I'm "sure " my local 5-star dealer will know. These are the same guys I had to show how to cycle the key three times to display a code.
Anyway, thanks again.

 

The Battery temp sensor is attach to the battery tray under battery.
The BTS is used to determine the batt temp and control batt charging rate.

 

.....we don't need to know the "three key cycles trick" we have the DRB. Best thing they could do is to rid of that feature. If it were a hard fault your mil light would come on. One time or another the data from your battery temp sensor (located under batt) was out of parameters and it stored a fault. Since no MIL light was tripped the system has since checked out ok. So if a tech jumps through the hoops your diag will show up on the last page....."condition that caused dtc not present at this time".

 

I'm the latest victim of this code. Dealer is going to replace the sensor, but they had to order it and 3 days after I took it in, the CE light is off all on it's own. Any news on this, or was it just a run of bad sensors??

 

OBDII requires a rationality check for all temp sensors.

When your OBDII diagnostic was ran (after sitting for longer than 6 hours), the battery temp was compared with the ambient air temp sensor (combination air temp/air press in the airbox cover) and a discrepancy was found (not sure exactly how far apart they have to be to light a lamp).

You can thank the EPA for that fault. It means nothing. Changing the sensor most likely won't help.

I personally think the 3 key switch/fault code display is a great way for customers to avoid unnecessary visits to the dealer. How would it help to get rid of it? I can certainly think of better things DC could do (ie. optimizing gear ratios, better ways to diagnose bad injectors, better diesel education for most dealers, etc.)

 

How would it help?? Because when joe shmoe blips the key, gets a code, attempts to research it, he immediately feels he needs a part changed. As stated above with the batt temp rationality, the ecm saw something it didn't like and simply bookmarked it. Good info for someone who may know what they are looking at. If the info is used correctly it's wonderful, but how often is that? A good example is our latest wonder of technology, and i'm sure will be coming to our trucks before too long, is the TPM (tire psi monitor). You have no idea on how many appointments have been made because "this light is on in my dash", how many complaints have been generated because of return visits. Tires lose air psi over time....nothing has changed there. Why do think they check them when you're getting your oil changed? To make you feel you're getting your $22.00 worth? Christ my grandmother knew how to check tires!! For some reason this fine art has skipped a generation or two and now it's the dealers fault that these tires are losing pressure. I wonder if techs had the same problem when "low washer" and "low fuel" lights came on the scene? Granted most that frequent here are somewhat mechanically inclinded, and with the help of some can come to a conclusion on what if anything needs to be done. Unfortunately, there are tons more out there who aren't and this information does nothing but inset panic......wow! was that a rant?

 

I just had the P0514 /check engine come on last Sunday. I had the same thing once last winter. Both times I had my truck plugged in and it stayed in the mid thirties at night without much temperature variance.
The check engine light goes off after a couple days and the code goes away after a certain number of start up.
Others have had their sensors replaced but I'll just let mine run the course. When it won't clear, I twist my arm to take it to a dealer.

 

Mine did it again today. Had it in the dealer twice last winter because of it. They cleaned the sensor the first time, and changed it the second. I see no reason to take it back unless it makes it run bad.
Aaron

 

If the differential is out of range (low/high) as below, it thinks something irrational is going on.

P0514 Battery Temperature Sensor Performance / Rationality
P0516 Battery Temperature Sensor Low
P0517 Battery Temperature Sensor High

It activates on mine when I am cold so I think it is actually rational.
This is a 40 start clearance I believe.
Aaron