Engine Diagnostics & Repair in Hayward, CA

When the check engine light comes on or your car runs rough, you need a shop that diagnoses the problem accurately the first time. At S&R Motors in Hayward, our ASE-certified technicians use advanced scan tools to read fault codes from every module on your vehicle, then verify the actual fault before recommending repairs — so you don't pay for parts you don't need.

We start every diagnostic with a full multi-system scan that reads codes from the engine, transmission, ABS, body control, and emissions modules. From there we use live data, oscilloscopes, smoke testers, and pressure gauges to confirm what's actually failing — whether it's a misfiring coil, a leaking intake manifold, a failing oxygen sensor, an EVAP leak, or a wiring fault. We use OEM and premium aftermarket parts to make the repair right.

A check engine light isn't always urgent, but ignoring it can turn a $200 sensor replacement into a $2,000 catalytic converter job. Engines that misfire dump unburned fuel into the exhaust, ruin oxygen sensors, and damage the catalyst. Rough running or stalling can leave you stranded. Diagnosing early protects your engine, keeps your fuel economy on target, and helps you pass California smog checks the first time.

Bay Area drivers see everything from stop-and-go commute traffic on I-880 to long climbs over the East Bay hills, and modern engines work hard in both. We serve drivers from Hayward, Castro Valley, San Lorenzo, Union City, and Fremont who want their engine diagnosed by a shop that knows what it's looking at — not one that just clears the code and hopes for the best.

Why Choose S&R Motors for Engine Diagnostics in Hayward

• ASE-certified technicians
• Advanced multi-system scan tools
• OEM and premium aftermarket parts
• Live data, oscilloscope, and smoke testing
• California smog readiness checks
• 12-month / 12,000-mile parts warranty
• Same-day or next-day appointments
• Conveniently located on Mission Blvd in Hayward