Emission Control System Repairs
When your truck's emissions system detects a problem, it doesn't just turn on a light. It can cut engine power, limit your speed to a crawl, and leave you unable to finish your route. I-55 Truck & Trailer Repair provides truck derate repair and emission control system service at our shop on I-55 in Crawfordsville AR and across Memphis & West Memphis. We diagnose the fault behind the derate, repair it properly, and get your truck back to full power.
Why Choose Us
Clearing Derates the Right Way
Emissions systems are complex, and a derate can be triggered by one bad sensor or a chain of related problems. Our ASE certified mechanics test each part of the aftertreatment system to find what's actually causing the fault. We focus on lasting repairs so you're not stuck in the same derate a week later. With 25 years in diesel repair and a shop that's open 24/7, we're ready when an emissions problem shuts you down.
What We Offer
Restoring Power and Keeping Your Truck Compliant
Your truck's emission control system includes several components that work together to clean the exhaust. A failure in any one of them can trigger warning lights or a derate. Here's what our emission control repair service covers:
Derate Diagnosis: We identify why the engine computer reduced power and which system triggered it. Knowing the exact cause is the fastest way to get your truck back to full speed.
SCR System Repair: The selective catalytic reduction system uses DEF to reduce harmful emissions. We diagnose SCR efficiency faults and repair the components causing them.
DOC Inspection and Service: The diesel oxidation catalyst helps burn off pollutants and supports DPF regeneration. We inspect it for contamination or damage that can lead to regen problems.
NOx Sensor Replacement: Failed NOx sensors are a common cause of emissions codes and derates. We test the sensors and replace any that are giving inaccurate readings.
Exhaust Temperature Sensor Repair: Accurate exhaust temperature readings are critical for regens and emissions control. We replace faulty sensors and repair damaged wiring.
Aftertreatment Wiring Repair: Heat and vibration can damage the wiring around the exhaust system. We repair chafed wires and corroded connectors that cause false faults.
System Verification Testing: After repairs, we run tests to confirm the system is working properly and the derate is cleared. This helps make sure the problem is fully resolved before you leave.
Frequently Asked Questions
What is a truck derate?
A derate is when the engine computer reduces power or speed to protect the engine or limit emissions. It's usually triggered by a fault in the aftertreatment system, such as a sensor problem, DEF issue, or clogged filter.
Can I drive my truck while it's in derate mode?
You may be able to drive a short distance, but power and speed will be limited, and some derates get more severe over time. It's best to get the truck to a shop or call for service as soon as possible.
What is a NOx sensor, and why does it fail?
A NOx sensor measures nitrogen oxide levels in the exhaust so the system can control emissions. Heat, soot, and age can cause these sensors to fail, which often triggers warning lights or a derate.
Will clearing the code get rid of the derate?
Clearing the code may temporarily restore power, but if the underlying problem isn't fixed, the derate will return. A proper repair is the only lasting solution.
Do you offer truck repair for emissions problems after hours?
Yes. Our team is available 24/7 for emissions faults and derates. Call (870) 635-4003 any time you need help.
Truck Repair Services by System
Expert repairs for every major system on your truck, in the shop or on the road.
MOBILE TRUCK REPAIR AND MAINTENANCE
Our mobile mechanics bring the repair to your truck, whether you're on the roadside, at a truck stop, or in your yard. We handle tires, batteries, forced regens, and routine fleet servicing on-site, 24 hours a day.
ENGINE AND TRANSMISSION
We repair and rebuild diesel engines, transmissions, clutches, cooling systems, and drivelines. From minor fixes to full overhauls, our ASE certified mechanics restore power and reliability.
ELECTRICAL AND DIAGNOSTIC
Advanced diagnostic tools help us find problems fast, from check engine lights to faulty modules. We also repair EGR, DPF, and emission control systems to keep your truck running clean and compliant.
BRAKE AND SAFETY SYSTEM
Safe stopping starts with a healthy brake system. We inspect, maintain, and repair air brakes, ABS, parking brakes, and brake fluid systems to keep you safe and DOT ready.
TIRE & LUBE
We repair, replace, rotate, and balance truck tires, and service suspension parts including shocks, bushings, bearings, and joints. The result is a smoother ride, even tire wear, and longer component life.
EXHAUST & AFTERTREATMENT
Beyond everyday repairs, we handle axle work, truck HVAC systems, and custom welding and fabrication for trucks and trailers. Our preventive maintenance and scheduled fleet programs help you catch problems early and avoid costly breakdowns.
Serving Memphis, West Memphis, and the Mid-South
Shop repairs in Crawfordsville AR and road service throughout the region.
From our shop at 7468 I-55, Crawfordsville, AR 72327, we serve drivers and fleets throughout Crittenden County, the Memphis metro, and nearby communities in Arkansas, Tennessee, and Mississippi, including:
Need a Trusted Truck Repair Shop Near Memphis?
Call now for shop repairs or 24/7 road service.
Whether you are passing through on I-55 or running a fleet out of West Memphis, I-55 Truck & Trailer Repair is ready to help. Call us or request service online, and we'll get you back on the road.
I-55 Truck & Trailer Repair is a trusted truck and trailer repair shop on I-55 in Crawfordsville AR, with 25 years of experience serving drivers and fleets across Memphis & West Memphis. Our ASE certified mechanics handle diesel repair, trailer repair, and 24/7 roadside service to get you back on the road fast.
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