Diesel exhaust fluid (DEF) is a urea solution injected into the exhaust of modern diesel engines to cut NOx emissions. The system is a chain: the DEF tank and heater, supply pump, lines, doser or injector, NOx and DEF quality sensors, and the SCR catalyst. When one link fails, the truck logs a fault, lights a warning, and can derate power or limit speed until it is fixed.
The tricky part is that one dash light can come from many causes: a failed heater, a clogged or crystallized injector, a bad sensor, a pump problem or contaminated fluid. Finding which one it is makes up most of the job.
Bawa’s has been working on trucks in Dallas since 2011. A DEF fault is the kind of problem where a driver needs a clear answer fast, because a derate costs miles and money. Drivers tell us on Google that we got them moving after other stops could not sort out the problem.
We read the faults, test the system, tell you what is wrong and what it costs, and repair it once you say go.
Working in Dallas
Open Monday to Saturday
Google Rating, 55 Reviews
Tell us the truck and what the dash is showing. Call +1 (214) 400-4228.
Diagnosis first, then the repair that actually fixes it.
We read the fault codes and test the system end to end, so we repair the failed part and not just the symptom.
DEF supply pump and injector or doser problems, including clogged and crystallized components.
DEF heaters, lines and fittings, and the tank level and temperature sensors.
NOx sensors, DEF quality sensors and contaminated-fluid problems.
We check the pump, heater, lines, injector and sensors before we recommend a replacement.
We tell you how urgent the problem is and what the truck is likely to do if it waits.
4.7 stars across 53 Google reviews from drivers and fleets.
Call and we will tell you whether we can come to the truck or you should bring it in.
What to expect when you bring us a DEF problem.
You will hear the likely cause and the cost before repair work begins.
We tell you what has to be fixed now and what can wait.
Call or stop in during shop hours and we will tell you where your truck stands.
Repairing commercial trucks and trailers here since 2011.
Three steps, no surprises.
Call +1 (214) 400-4228 and tell us the truck, the warning and any codes you have seen.
We read the faults and test the DEF system to find what has actually failed.
We explain what we found and what it costs. The repair goes ahead once you approve it.
Diesel exhaust fluid, or DEF, is a urea-and-water solution the truck sprays into the exhaust so the SCR system can cut nitrogen oxide emissions. If the DEF system cannot do its job, the truck can derate power or limit speed until the problem is fixed.
Call +1 (214) 400-4228 with your location and what the dash is showing. We will tell you whether we can come to the truck or whether it should come to the shop at 4700 Irving Blvd #200. We try to fix it on site first. If it cannot be repaired there, we can tow it to our shop for the repair. We do not offer towing to other locations.
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Serving commercial drivers and fleets throughout the Dallas–Fort Worth Metroplex and surrounding counties.
Primary Location
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Road service within 50 miles of our shop, Monday to Saturday, 8 AM to 6 PM. Not sure if you are in range? Call us and we will tell you.
Abs went out and after going to TA and Loves they could not fix the issue. BAWAs came in clutch. Got me back on the road. Turning tires, and making money.
Google review · ABS repair
Great place of business Harry was very helpful and the owner was very nice and transparent
Google review
Excellent friendly people work super fast and solve everything recommended at %100
Google review
We check both, so you replace only what has actually failed.
It means the truck has detected a problem in the DEF or SCR system, such as low or poor-quality fluid, a failed pump, heater or injector, or a sensor fault. The light alone does not say which, so the system needs to be read and tested.
Many modern diesel trucks will warn first and then derate power or limit speed if the problem is not fixed. Do not wait it out. Call +1 (214) 400-4228 with the truck and what the dash shows and we will tell you what to do.
Either can be the cause. Contaminated or old fluid can trigger faults, and so can a failed pump, heater, injector or sensor. We check both so you are not replacing parts that are fine.
It depends on what has failed and the parts involved, so we do not quote blind. Call us with the truck and the codes and we will give you a clear estimate before any work starts.
Sometimes. Call with your location and what the truck is doing, and we will tell you whether it can be handled where it is or needs the shop. If it cannot be fixed on site, we can tow it to our shop for the repair.
We are open Monday to Saturday, 8 AM to 6 PM, and closed Sunday. For anything outside those hours, call +1 (214) 400-4228.
Bawa’s Truck & Trailer Repair has repaired trucks and trailers at 4700 Irving Blvd #200 in Dallas, TX since 2011, and customers rate us 4.7 on Google across 55 reviews. This page is general guidance, not a diagnosis. Every unit is different, so call +1 (214) 400-4228 and tell us what yours is doing.
Share the truck, the warning light and any codes you have seen.
PHONE NUMBER:
+1 (214) 400-4228ADDRESS:
4700 Irving Blvd #200, Dallas, TX 75247, United StatesCall +1 (214) 400-4228 or stop by 4700 Irving Blvd #200, Dallas, TX 75247, Monday to Saturday, 8 AM to 6 PM.