Diesel truck repair for fleets and owner-operators who can't afford downtime or guesswork. ECM scanning, live data, transparent estimates, every time.
Built for Uptime.
Every job starts with a real diagnostic, not a guess. Here's what we handle.
Diagnostics & ECM Scanning
Full ECM scan, live data analysis, fault code interpretation, and root cause diagnosis. We pinpoint the problem in 60 minutes, so you know exactly what's wrong before a single wrench turns.
Explore Diagnostics 01Engine Repair
Injector service, valve adjustments, oil and coolant leaks, and complete overhauls across all major platforms.
Aftertreatment / DPF / SCR
DPF regen and cleaning, SCR/NOx sensors, DEF system repair, EGR service. We get you out of derate.
Brakes
Air brake service, drum and shoe replacement, slack adjusters, S-cam, and ABS diagnostics.
Electrical
Wiring harness, alternator and starter, lighting, and chassis electrical troubleshooting.
A/C & HVAC
Condenser replacement, recharge, compressor diagnosis, and climate control service.
See the work.
Real trucks, real repairs, straight off our shop floor. New clips every week.
Same truck. Same fault.
$955 apart.
A DEF and DPF fault on a Class 8 truck. This is the pattern we see when a truck reaches us after another shop has already replaced parts until the light went out. We scan the ECM, find the cause, and fix it once. Every figure below is LTEK's own invoiced labor average for that job.
Parts first
Four visits to find it
Diagnosis first
One visit to fix it
Truck already down? Call (619) 848-0459 or send a text. Same-day diagnostics, Mon to Fri, 8am to 5pm.
Labor figures are LTEK's own invoiced averages for each of these jobs. They are shown together to illustrate a fault path we see regularly on trucks that arrive after being parts-swapped elsewhere, not a single customer invoice. Parts are additional on both sides. Repair sequences vary by truck and by shop.
Every Truck.
Every Repair.
On File.
Running three or more trucks? Every unit you send us gets a permanent file. Invoices, inspections, PM intervals, compliance dates. We keep all of it, and you can pull any of it. Most shops hand you a receipt and forget the truck existed.
serviced 495CARB tests
completed
- Priority bays Same day diagnostics. Your trucks go first.
- PM on your mileage Oil, filters, DPF service, and inspections mapped to how you actually run.
- Compliance handled DOT, BIT, 90 day, and CARB. We flag it before it lapses.
- One advisor Same person every call, who already knows your fleet.
What Our Customers Say
★★★★★ 5.0 · 78 reviews on GoogleSebastian and the team at LTEK are wonderful. They are fair, knowledgeable, and their customer service is top notch. Shops like LTEK are exemplars of professionalism!
They've been honest, transparent, done such great work, all at an extremely reasonable price, time and time again. I recommend them 110%.
We've been working with LTEK since 2019. Louie is a very professional and honest diesel mechanic who always diagnoses issues accurately.
When my 2019 Peterbilt went into derate, Sebastian made it painless and guided me through the whole process. The owner, Louie, and Victor went right to work.
They diagnosed and fixed my injector issue quickly and professionally. Honest about the problem, explained everything clearly, and didn't try to upsell anything unnecessary. The pricing was fair for the quality.
Beto and Raul are always very knowledgeable. If you need diesel repairs in San Diego, go see them.
Everything fleet managers and owner-operators ask us before their first visit.
What makes LTEK different from other diesel shops?
We are a diagnostics-first shop. Every job starts with an ECM scan and live data analysis to identify the root cause, not guessing or throwing parts at it. Transparent, fast, and built to minimize your downtime.
How quickly can you diagnose my truck?
Diagnostics are our priority. Most trucks get a full diagnosis and estimate within 60 minutes of check-in.
Do you work with fleets?
Yes. We specialize in fleet maintenance and compliance: scheduled inspections, PM programs, and fast diagnostics to keep your trucks legal and running.
Do you perform DOT, BIT, and CARB inspections?
Yes. DOT, BIT, 90-day inspections, and CARB Clean Truck Check testing, including any required repairs to help trucks pass compliance.
Do you offer warranties?
All repairs come with a workmanship warranty. Parts are covered by the manufacturer's warranty unless otherwise stated.
Do you offer mobile mechanic services?
Yes. Mobile service across San Diego County for breakdowns and on-site diagnostics. Our team is fully equipped for field work.
Minutes from the Otay Mesa border crossing and right off the 905. Built for drivers who need to get in, get diagnosed, and get rolling.
From the Border
Minutes from the Otay Mesa crossing, one of the first diagnostic shops north of the line.
Off the 905 & 125
Easy in, easy out near Brown Field, with room to maneuver a Class 8 without fighting traffic.
Can't Move It?
Mobile service across San Diego County. Call and we will come diagnose it where it sits.
Your Truck Can't Wait.
Neither Can We.
Same-day diagnostics. Transparent estimates. Repairs done right — the first time.
or text us at (619) 848-0459 →