I'm getting a p2509 - ECM/pcm power input signal intermittent code. What does that mean? Is the power supply to my computer messed up? Trucks not running bad.

 

Usually passenger side battery is running low.

 

Got that same code this am. Cleared the code. We'll see if it returns... Also,,, had a p1740 code at the same time ... anyone know if the 2 are related ??? Only had this truck for about 3 weeks.. Now this...I stayed away from new because of all the codes.. only to get a 5.9 with codes

 

Mine displayed P2509. Dealership replaced driver's side battery. Problem gone now for 2 months.

 

any idea what P1740 is ??.......Ok,, found out what the code is.... TCC Solenoid or overdrive solenoid performance>>>>>>what ever that means ????

 

thanks guys. I think that solved it.

 

If you need new batteries the truck will do weird stuff. Try getting your batteries load tested and get new ones if needed then delete the codes.


I'd try that first before worrying too much.

 

It is best to replace both BATT at the same time.If the old one needs more charging it will over charge the new one.

 

https://www.dieseltruckresource.com/....html?t=248741

This was my experience with P2509. Turned out to be a loose ground on my batteries.

 

Ive replaced batteries 3 times over the years on my truck and never gotten p2509 code before they went out.