Diagnostics & Electrical Repairin Ontario, CA.

Clearing a code without fixing the cause usually brings the light back. We read the codes, look at live data and test the circuit so we fix the real fault instead of just resetting it.

The engine computer reduces power to protect the engine or emissions system. Common causes are aftertreatment faults, sensor failures, low fuel pressure or overheating. A proper diagnostic finds the reason so full power can be restored.

Weak batteries, bad cables, a failing starter, low fuel pressure, air in the fuel, glow plug or intake heater problems, and sensor faults are common causes. We test each system rather than guess.

Many problems are found within an hour or two. Intermittent electrical faults can take longer to trace. We keep you updated and explain what we find before any repair.

We work on light, medium and heavy duty diesel trucks, fleet vehicles, trailers and RVs, including Freightliner, International, Peterbilt, Kenworth, Volvo, Mack, Hino, Isuzu, Ford Power Stroke, Ram Cummins and GM Duramax.

It depends on the truck, the parts and what we find. We diagnose first, then explain the repair options and the price before any work begins, so there are no surprises. Call, text or use the form to get started.

Calling ahead is best so we can plan bay time and parts. If your truck is down, call (909) 701-8755 and we will tell you the fastest way to get it in.