A Methuen car that sets a check engine light on the highway and clears it in town usually has a fault that only shows under load or heat. Those intermittent faults are hard to catch with a quick code read and easier with live data.
What Diagnostics & Check Engine Covers
- OBD-II and manufacturer-level scan tools
- Drivability and intermittent fault diagnosis
- Electrical, sensor, and emissions troubleshooting
- Detailed report of findings and recommended repairs
- EV diagnostics including Rivian
Sustained highway speed works the fuel system, ignition and cooling harder than short trips do, so weak coils, failing fuel pumps and marginal thermostats often reveal themselves on I-93 first. We read freeze-frame data to see exactly the speed, load and temperature when the code set, then test the system under similar conditions.
Don't clear the codes before you come in. The stored data is the best evidence we have. Call for current pricing.
Methuen Questions About Diagnostics & Check Engine
- My check engine light only comes on during my highway commute. Can you find it?
- Usually, yes. The car stores freeze-frame data from when the fault set, including speed and load, which tells us what to test and how to reproduce it.
- The light is flashing while I'm on I-93. What should I do?
- Ease off and get off the highway safely. A flashing light means an active misfire that can overheat the catalytic converter, so the car should be checked before more highway driving.