Check Engine Light Diagnostic

Service Description

Our certified technicians use original manufacturer diagnostic software and tools, giving us direct access to the same systems, codes, and data used by dealership service departments. This allows us to retrieve accurate Diagnostic Trouble Codes (DTCs) specific to your vehicle’s make and model, and eliminates the guesswork often seen with generic scan tools. Once we retrieve the codes, we don’t stop there. We follow factory-recommended diagnostic procedures — including step-by-step testing sequences, sensor readings, circuit inspections, and system function checks — to pinpoint the exact cause of the problem. Whether it’s a failing sensor, an emissions component, or an intermittent wiring issue, we take the time to verify the fault before recommending any repairs. The result is a precise, honest, and transparent diagnosis, so you can feel confident you’re only repairing what’s truly necessary. At Marin Auto Works, we believe in fixing it right the first time — no unnecessary parts, no inflated estimates, just expert service and peace of mind.