Check engine light

[DHull]

Well I got up this morning at 0500 to go to work and my usual routine is to drive my truck. Suprise it did not start battery low good thing I have a spare ride 1989 buick century which I drive during the week. So I put the charger on before I left it read 45% battery. I was gone about 9 hours when I got back it read 77%. So I let it charge 2 more hours it then read 88%. There was a very little dirt on them but I took the time to totaly clean the two. After it was back together I put the charger back on and wow it is now at 100%. Got in the truck it started and now I have a CEL code 2509. I can't find my copy of the codes,need some help. Thanks

 

[Bob4x4]

2509 can be caused by bad/low battery

 

[DHull]

ok but does the CEL go away?

 

[HBarlow]

When you don't bother to describe your truck in your post or signature you reduce the chance of receiving good recommendations on repairing your problem.

 

[DHull]

Sorry thought when the web changed the info did too. I have a 2008 6. 7 stock quad cab with 48000 miles

 

[Newt]

If the ECM doesn't detect the problem for x number of starts, the code display goes away. I think 3 to 5, something like that.

Newt

 

[DHull]

Thank you that is exactly what happened 3 full operating tempurture cycles.

 

[HBarlow]

Lots of '08s had defective OEM batteries that only lasted a couple of years. I replaced both of mine about a year and a half ago when one of them developed a dead cell or two. Later several other TDR members posted about early battery failures.

You may have the same problem.