Aftertreatment faults have a particular talent for arriving as a derate at the worst possible moment. Energy Transport Solutions handles DPF and aftertreatment work on site across the Houston-to-Conroe corridor, on Peterbilt, Kenworth, Freightliner and International equipment.
What we work on
- Regen faults — regens that will not start, will not complete, or run constantly
- DPF cleaning and service — filters loaded beyond what a regen will clear
- Derates — the power and speed limits the system imposes when it is unhappy
- Sensor and wiring faults — pressure and temperature sensors, and the connectors that fail in Gulf Coast humidity
- DEF system problems — quality faults, dosing issues and the warnings that follow
- Diagnosis of repeat faults — the ones that come back after being reset
Why these systems fail here specifically
Duty cycle is nearly always the underlying story. Aftertreatment needs sustained heat to burn off accumulated soot, and heat comes from sustained load. A truck running loaded to Dallas gets it. A truck doing terminal work, yard moves and short runs around the Houston Ship Channel and north side does not.
That is the pattern behind most repeat DPF trouble on this corridor. The system is not broken — it is being asked to work in conditions it was not designed around, so soot accumulates faster than it clears. Cleaning the filter treats the symptom, and the same truck is back in three months.
Heavy idling compounds it. So does stop-and-go traffic on I-45 through the widening corridor, which produces the low-load running that keeps exhaust temperatures down.
Humidity plays its part on the electrical side. A significant share of aftertreatment fault codes trace to sensors, connectors and wiring rather than the filter or dosing hardware — which matters, because replacing a DPF that was working is an expensive way to not fix a wiring fault.
What we do differently
We tell you what we are seeing, not just what we reset. If a truck is producing repeat faults because of how it is being run, that is worth knowing — sometimes the answer is a route or duty-cycle change rather than another cleaning, and that conversation saves considerably more than the repair does.
And we diagnose before replacing. Aftertreatment components are expensive enough that guessing is a costly strategy, and codes in this system frequently name a symptom rather than a cause. Where diagnosis is needed, the fee is a flat $300, quoted before we roll.
Serving Houston to Conroe and nearby
We cover I-45 from north Houston through Spring, The Woodlands, Conroe and Willis; US-59 and I-69 through Humble and New Caney; SH-249 toward Tomball; and the Grand Parkway between them, plus the terminals and yards around Loop 336 and Houston's north side.
If a truck is derated and still moving, call before deciding whether to continue. Whether that is sensible depends entirely on what triggered it, and some causes get worse quickly.