P2459

[rono]

Supposed to be a regeneration frequency problem. It did regen last week and again today. What could cause this and how to fix it? About 44000 miles.

 

[JJJ]

Saw this on the other forum.

Ultimately you can clear and go, it just means that twp regens happened in a short interval. Some times the detection of this fault can get thrown off due to interrupted regeneration events.

If it continues to happen it can be a sign your engine is smoking heavily, most of the time due to a partially disconnected or loose cac hose.

 

[rono]

Saw this on the other forum.

Ultimately you can clear and go, it just means that twp regens happened in a short interval. Some times the detection of this fault can get thrown off due to interrupted regeneration events.

If it continues to happen it can be a sign your engine is smoking heavily, most of the time due to a partially disconnected or loose cac hose.

Thanks for the reply, but what is the cac hose?

 

[JJJ]

Thanks for the reply, but what is the cac hose?

Charge Air Cooler Hose. Most likely the code was related to the two regens. I would just clear the code and see if it returns.

 

[rono]

Charge Air Cooler Hose. Most likely the code was related to the two regens. I would just clear the code and see if it returns.

Charge air cooler, ok, thanks. Will clear and see what happens.

 

[JJJ]

Good luck.