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Engine Light & Diagnostics

That light on your dash means something. We figure out what — accurately, with proper tools, and we explain it in plain English.

Signs You Need Service

  • Check engine light is on or flashing
  • Unusual noises or performance issues
  • Sudden drop in fuel efficiency
  • Rough idling or stalling
  • Other dashboard warning lights you don’t recognize

How We Handle It

  • Advanced diagnostic scanning
  • Accurate fault code identification
  • Hands-on system inspection and testing
  • Clear, plain-English explanation of the issue
  • Repair recommendations based on real data

Service Details

A check engine light is your car’s way of telling you something’s not right. The problem is, the code itself is rarely the full story.

A “P0420” code, for example, can mean a failed catalytic converter, a bad oxygen sensor, an exhaust leak, or a dozen other things. Throwing parts at the code without proper diagnostics is how a $40 repair becomes a $1,000 mistake.

We use advanced diagnostic equipment to read the data, but we don’t stop there. We test, inspect, and verify — figuring out what’s actually causing the code, not just what the code says. Then we explain it clearly: here’s what’s wrong, here’s what it’ll take to fix, here’s what your options are.

Diagnostic scans are free at MAC. The only thing we charge for is solving the problem.

Frequently Asked Questions

Is your diagnostic scan really free?
Yes — for the basic scan to read codes and give you an initial assessment. Deeper diagnostics that involve disassembly or extended testing may have a fee, which we’ll discuss with you upfront before any work begins.
You can, but the underlying issue won’t go away — and the light will come back on. Worse, you’ll lose useful diagnostic data that helps us figure out what’s wrong. Better to bring it in.

Yes — and it’s important. A flashing check engine light usually means an active misfire that can damage your catalytic converter. Don’t drive it far. Get it scanned as soon as you can.

Most of the time, yes. Some intermittent issues require additional testing or driving the vehicle to reproduce the problem. We’ll always tell you what we know, what we don’t, and what it’ll take to find out.

24+ Years

4.7 ★ Google Reviews

Guaranteed Workmanship

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Call (714) 580-7848
Open Mon – Thu, 6:30am – 5pm