Initial Review & Vehicle Intake
Our technicians connect the appropriate diagnostic tools, inspect related systems, review fault codes and live data, and evaluate the engine’s overall operating condition.
We go beyond the initial codes or symptoms to determine the actual source of the issue, whether it involves the engine itself or a related fuel, cooling, electrical, air intake, turbo, emissions, or sensor problem.
We explain what we found, outline the repair options, and identify what needs immediate attention versus what should be monitored or planned for future service.
Once approved, we complete the necessary repairs using proper procedures and quality parts, addressing both the main failure and any related issues that could affect reliability.
We verify repairs, clear and recheck codes as appropriate, test operation, and confirm the unit leaves with improved performance and dependable engine operation.
If needed, we help the customer fold related maintenance or follow-up inspections into a broader service plan to reduce repeat issues and improve long-term uptime.
Q: What’s the difference between pulling a code and full engine diagnostics?
A: Pulling a code only tells you where the system detected a problem. Full engine diagnostics goes further by reviewing data, symptoms, and related systems to determine the actual cause of the issue before repairs are made.
Q: Can you diagnose intermittent engine problems that don’t happen all the time?
A: Yes. Intermittent issues can be harder to isolate, but a thorough review of fault history, operating conditions, and related systems often helps identify patterns and likely causes.
Q: Why does the check engine light keep coming back after a previous repair?
A: A recurring warning light may mean the original issue was only partially addressed, a related problem was missed, or the code pointed to a symptom rather than the root cause. That’s why a complete diagnostic process matters.
Q: Can engine problems affect fuel economy and performance before a major failure happens?
A: Absolutely. Many engine issues begin as reduced power, rough operation, increased fuel use, longer crank times, or occasional warning lights before becoming a more serious repair.
Q: Do you only handle major engine failures, or can you diagnose smaller performance issues too?
A: ATS Fleet Service handles both. Smaller performance concerns are often the best time to bring a unit in, since catching a problem early can help avoid a more expensive repair later.
Q: Can engine diagnostics include related systems like cooling, turbo, sensors, and emissions?
A: Yes. Engine performance issues are often tied to supporting systems, so diagnostics may include fuel, air intake, cooling, electrical, and emissions-related components as part of the troubleshooting process.
Q: Why should I use ATS Fleet Service for engine diagnostics and repair?
A: ATS Fleet Service approaches engine issues with a commercial fleet mindset. That means focusing not just on what failed, but on uptime, repeatability, repair accuracy, and the broader systems that affect long-term truck reliability.
