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Car Auto Repairs of Texas

Texas auto repair service

Engine Diagnostics & Check Engine Light in Texas

Quick answer

A check engine light can mean anything from a loose gas cap to a failing catalytic converter. Our technicians use dealer-level scan tools and hands-on testing to find the real cause — not just read a code. Typical cost: $89 – $179 diagnostic (credited toward repair). Call 469-402-3923 for a same-day appointment.

Call 469-402-3923

What's included in check engine light diagnostics

  • Full computer scan of all modules
  • Live data and freeze-frame analysis
  • Smoke testing for vacuum and EVAP leaks
  • Written findings with repair options
  • Diagnostic fee credited toward repair

A check engine light can mean anything from a loose gas cap to a failing catalytic converter. Our technicians use dealer-level scan tools and hands-on testing to find the real cause — not just read a code. Every job at Car Auto Repairs of Texas comes with a written estimate.

Engine Diagnostics & Check Engine Light in progress

Our check engine light diagnostics process

  1. 1

    Call or request a quote

    Tell us about your vehicle and the engine issue. We confirm a time that works — often same day.

  2. 2

    Inspect & diagnose

    A certified technician inspects the vehicle and explains exactly what we found, with photos when helpful.

  3. 3

    Approve a written estimate

    You get an upfront, itemized price. No work starts until you say yes.

  4. 4

    Repair & road-test

    We complete the repair with quality parts, road-test the vehicle, and back it with our warranty.

How much does check engine light diagnostics cost?

$89 – $179 diagnostic (credited toward repair)

Final price depends on your vehicle. You'll always get a written estimate before work begins.

Check Engine Light Diagnostics FAQs

If the light is steady, you can usually drive short distances, but get it checked soon. If it's flashing, stop driving — that signals a misfire that can damage the catalytic converter.

They read the code, which only tells you which system flagged a fault. We test the system to find the failed part, so you don't replace parts that aren't broken.

Most diagnostics take 45–90 minutes. Intermittent problems can take longer, and we'll keep you updated.

Yes. If you approve the repair with us, the diagnostic fee is credited toward the final bill.

Check Engine Light Diagnostics near you

Dallas–Fort Worth Metroplex

Greater Houston

San Antonio & Hill Country

Austin & Central Texas

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Related services

Car trouble? We're open until 11:45 PM, every day.

Call now for a free quote and same-day service across Texas.

Call 469-402-3923