Truck EGR & DPF Services in Seguin, TX

Truck Aftertreatment Repair in Seguin, TX

Your aftertreatment system is designed to reduce emissions, but when parts like the EGR or DPF fail, they can choke your engine’s performance. Whether it’s clogged filters or sensor faults, these issues require professional attention. Leaving these unchecked can impact your vehicle's performance and lead to emissions breaches, resulting in fines of over $45,000 per noncompliant vehicle.

At H&H Diesel Service, we specialize in truck aftertreatment repair that keeps you compliant and on the move. Our services include:

• DPF cleaning for trucks (thermal, air, and liquid methods)
• Truck DPF filter cleaning and replacements
• EGR valve replacement for trucks
• EGR cooler and sensor service
• DEF level checks and dosing system diagnostics
• Forced regeneration and regen troubleshooting
• Aftertreatment fault code clearing and diagnostics
• Full soot level analysis and soot removal strategies

Warning signs include reduced engine power, poor fuel economy, frequent regens, and clogged filter codes. These systems are sensitive, so if you notice any of these issues, get your truck checked before further damage occurs. We’ll pinpoint the fault and restore your engine’s breathing room quickly and effectively.

Experience the H&H Difference

Capacity to Handle Fleets and One-Off Repairs: You don’t sit in line here. With six huge bays and eight certified techs, we’ll get you in and out quickly and with the quality you expect, whether it’s one truck or ten.

Emissions System Experts: We work with advanced systems daily, from DEF dosing to forced regeneration. Our PACCAR, Kubota, and Terex certifications ensure every repair is done right.

Upfront and Honest Communication: You get clear answers and straight pricing. We explain what failed, why it matters, and how we’re fixing it, before we touch a wrench.

Repairs Backed by Real Guarantees: You drive away with confidence. Our repairs come with a 30-day workmanship warranty, plus all applicable parts warranties.

Mobile Repairs: Can’t make it to the shop? We offer dependable roadside assistance and scheduled mobile repairs to a 25-mile radius of Seguin, TX.

Contact Us About EGR and DPF Repairs Now: Call 210-332-5821!

When your aftertreatment system goes down, performance follows. Don’t ignore the signs. Call 210-332-5821 and let H&H Diesel Service restore your DPF, clean your EGR system, and keep your emissions system running clean and compliant.

FAQs

What Areas Do You Serve for Heavy-Duty EGR and DPF Repair?

We’re located at 7310 I-10 West, Seguin, TX 78155, just off the I-10. We also serve San Antonio, TX; Lockhart, TX; Luling, TX; New Braunfels, TX; San Marcos, TX; Cibolo, TX; Schertz, TX; Marion, TX; McQueeney, TX; Geronimo, TX; New Berlin, TX; Santa Clara, TX; and Lake Dunlap, TX.

What Is Forced Regeneration?

Forced regeneration is a manual process used to clean the diesel particulate filter (DPF) in heavy-duty diesel vehicles. It raises exhaust temperatures to burn off excess soot when automatic regeneration fails. This restores proper filter function and prevents engine performance issues or warning lights.

What Are the Signs of a Bad EGR Valve?

Signs of a bad EGR valve in heavy-duty diesel vehicles include rough idling, reduced power, poor fuel economy, black smoke from the exhaust, and engine warning lights. A malfunctioning EGR can increase emissions and lead to further engine damage if not addressed promptly.

How Can I Get Heavy-Duty EGR and DPF Repair?

Just call 210-332-5821 and schedule your inspection. We’ll diagnose your system, perform the needed repairs or cleaning, and have your truck running strong and clean.