Auto Diagnostics & Check Engine Light Testing | Calgary SE & SW

Modern vehicles rely on dozens of computer-controlled systems. When something isn’t right, your car may turn on the Check Engine Light, show a warning message, or start running differently. The important part: a code is not a diagnosis—it’s a clue. At Heritage AutoPro, we use scan tools plus real testing to pinpoint the actual cause so you’re not replacing parts unnecessarily.

We provide professional auto diagnostics in Calgary SE & SW for most makes and models, including domestic, European, and JDM vehicles.

Common Reasons Customers Book Diagnostics

• Check Engine Light is on (steady or flashing)

• Rough idle, misfires, or shaking

• Loss of power / hesitation / stalling

• Poor fuel economy

• Hard starting or intermittent no-start

• Overheating concerns

• ABS / traction / stability lights

• Battery/charging warning light

• A/C performance issues

• Strange noises, smells, or vibrations

Flashing Check Engine Light = stop driving if possible. It often indicates a misfire that can damage the catalytic converter.

What’s Included in Our Diagnostic Process

We don’t just “pull codes.” Depending on the concern, our diagnostic process may include:

1) Code Scan + Data Review

• Reads trouble codes (powertrain, ABS, airbag, body, etc. where supported)

• Reviews freeze-frame data (what the vehicle was doing when the fault happened)

• Checks readiness monitors and system status

2) Root-Cause Testing (Not Guessing)

Examples of real tests we may perform:

• Smoke testing for vacuum/intake leaks

• Fuel trim and sensor data analysis (O2/AFR, MAF/MAP, temps)

• Misfire analysis and ignition/fuel checks

• Electrical testing (voltage drop, continuity, grounds, charging output)

• Battery/starter/alternator testing when relevant

• Cooling system pressure tests and thermostat operation checks

• Road test + live-data logging (when needed)

3) Clear Explanation + Repair Options

You get:

• What we found (the cause, not just the code)

• What’s urgent vs. what can wait

• Your repair options and next best steps

Diagnostic Areas We Commonly Handle

• Check Engine Light / drivability diagnostics

• Electrical diagnostics (parasitic drain, wiring, modules, sensors)

• ABS / traction / stability diagnostics

• Starting & charging diagnostics (battery, alternator, starter, cables)

• Cooling system diagnostics (overheating / no heat)

• A/C & climate control diagnostics

• Noise / vibration / pulling diagnostics (when symptoms point to brakes/suspension/driveline)

Why Professional Diagnostics Saves Money

Replacing parts based only on a code can get expensive fast. Proper diagnostics helps you:

• Avoid unnecessary parts replacement

• Fix the issue once (instead of chasing symptoms)

• Reduce repeat breakdowns

• Protect major components (catalytic converter, engine, transmission)

If your Check Engine Light is on or your vehicle isn’t driving the way it should, book diagnostics at Heritage AutoPro. We’ll test, confirm, and explain the solution clearly—so you can make the right decision with confidence.