2009 KW T660--ISX Cummin fault codes 2637

[Rawze]

(07-04-2016 )commonsense Wrote:  I recently had the DPF filter cleaned on my 2009 KW T660. Occasionally we get a check engine light coming on-it stays on no more than an hour-than the DPF filter light will come on and the engine light goes off. The DPF filter light stays on anywhere from a few seconds up to 40 minutes. Nothing happens to the truck when the lights come on -there is no derate in the motor.
We coded the motor and it came up 2637-fault states "Catalyst Face Plugged-Root unknown". So I think it needs to be a stationary regen but it won't go into regen.

could this just be a faulty sensor or something else???

This is a remanned ISX motor with 345,000 miles on it

The regen switch in the dash will not allow for a regen unless the engine thinks it needs one.

What DPF filter light comes on?

What are the other codes comming up with the face-plug alarm?

has anyone actually pulled off the DPF and DOC and inspected them to see if they are indeed face plugged again?

How many miles are on the truck, and does it consume any oil or coolant?

Here is where I would start if I owned it ...

http://rawze.com/forums/showthread.php?t...122#pid122