2017 ram 2500 6.7 diesel 23k miles, p202b code

[patrick antonides]

p202b diesel exhaust fluid heater code stuck on dashboard 2017 ram 2500 with 23k miles.

 

[Diesel85]

p202b diesel exhaust fluid heater code stuck on dashboard 2017 ram 2500 with 23k miles.

How old are your batteries?

 

[patrick antonides]

less than 1 year, i am on my 3rd or 4th set i dont drive it much, i been reading about low batts causing all kinds of stuff, with other guys trucks i check my voltage on the dash it says 13 volts when warm, i will check it at cold start in the morning, I live in Phoenix its low 90's in morning and 118 late in the day,

 

[Topzide]

Heat kills a battery pretty quick! If you're not driving it very much, you need to invest in a battery tender. The long periods between driving puts a lot of strain on the storage capacity. Batteries do very strange things when they are low. Hope you can get it figured out.