Check Engine Light Diagnostics
Don't guess when your check engine light comes on. Our dealer-grade equipment finds the problem accurately.
Comprehensive Engine Diagnostics
That check engine light isn't just annoying — it's your vehicle's way of telling you something needs attention. But what? Generic OBD-II readers give you a code number, but they don't tell you the whole story.
At C & J Auto Repair, we use dealer-grade diagnostic scanners that access manufacturer-specific codes and live data streams. This means we can interpret what your vehicle's computer is trying to tell you and confirm the exact component that's failing.
Our diagnostic fee is $89, and if you proceed with repairs at our shop, we apply that amount toward your final bill. It's our way of showing confidence in our diagnosis and commitment to earning your business.
What Our Diagnostics Include
We go beyond basic code reading to give you complete answers.
Complete System Scan
We read all diagnostic trouble codes (DTCs) from every computer module in your vehicle, not just the engine control module.
Live Data Analysis
We monitor real-time sensor readings to confirm which codes indicate actual problems versus pending issues.
Visual Inspection
We visually inspect related components, hoses, vacuum lines, and electrical connections for obvious issues.
Written Report
You receive a detailed report with code descriptions, our findings, and recommended repair options with pricing.
Common Causes of Check Engine Lights
Here are some of the most frequent issues we find during diagnostics.
Oxygen Sensor Failure
Often caused by contaminated fuel or normal wear. Affects fuel economy and emissions. Typical repair cost: $150-$500.
Loose or Damaged Gas Cap
Sounds simple, but a loose, cracked, or damaged gas cap can trigger the check engine light. Free fix if this is the issue!
Faulty Mass Air Flow Sensor
Impacts engine performance and fuel economy. Often caused by dirty air filters. Typical repair cost: $200-$400.
Catalytic Converter Issues
Often a symptom of another problem (like a bad O2 sensor). Can affect performance and emissions. Typical repair cost: $500-$2500.
Spark Plug or Ignition Coil Problems
Can cause misfires, rough running, and poor fuel economy. Typical repair cost: $100-$400 per coil/plug.
EVAP System Leaks
Small leaks in the emissions system, often from cracked hoses or a loose gas cap. We locate the exact leak point.
Check Engine Light On? We Can Help.
Don't ignore that warning. Early diagnosis prevents expensive repairs.