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I can't think of a single case of an egr cooler clogging on one of these (where I work, anyway).

Also, what's the oil temperature when this occurs? If it's high, there may be a flow problem through the oil cooler, assuming that it has an oil thermostat. Edit: It appears that the pressures you are seeing are normal. If you felt a loss of power, it was probably unrelated. You'd have to have...

What model Cummins? ISX?

They tend to come in between 185-200 degrees. Do you suspect a dpf issue? Remove the intercooler. This reveals how filthy the radiator has become, and allows you to clean it. If the temp gauge is moving past its normal mark with no fan clutch operation, replace the fan clutch or you'll...

What's your normal oil pressure during these conditions?

When are you going to look at it again? If you want, i'll pm you my phone #.

The injectors sound ok at this point.

You haven't messed up. The codes will be in the dx report. Sounds like you need a dpf.

On the toilet tank.

You can correct that next to any building (especially a dark-colored one) at night in 10 minutes. Just a suggestion.

What were the codes? Generally speaking, the codes aren't intermittent. They will come back. In other words, don't clear them to see if they come back. On a 2012, first you want to do an injection quantity test. Run the truck until the coolant temp is above 176 or so. After it's warmed...

Id just run two new lines, personally. They just tee them together.

This is a characteristic of aftermarket HID systems, one that specifically makes them illegal. The light doesn't focus correctly in a regular housing, and it blasts everyone on the road.

No generic HID light kits are DOT legal, in case anyone is wondering.

Have you dug into it yet?

Before you attempt to regen it, go into the ecu, dcu, bcu, hit system fix, then exit. Write down the codes. Go to past work information. This info consists the dx report. Go into ecu system protection data. Find the line that says something like 'amount of pm piling up' and report back. If its...

This truck is going to be entirely different. Totally different type of dpf heating. Once you understand how it works, you'll be able to narrow down problems pretty quickly. What's the truck doing that has caught your attention?

Usually it's sort of simple stuff that makes a truck with a burner system (11-14 conventionals) have regen problems, but is has to be caught and fixed before the dpf gets damaged. When are you going to dive in?

What year 268? You're in for a riot!