Emissions Repair for
Failed Tests, Warning Lights, and Poor Performance
If your vehicle failed an emissions test or the check engine light is on, the issue should be diagnosed before parts are replaced. Emissions problems can come from sensors, fuel control, ignition problems, exhaust leaks, EVAP system leaks, catalytic converter issues, or engine performance concerns.
Why Emissions Diagnosis Matters
Your vehicle's emissions system is designed to reduce harmful pollutants while helping the engine run properly. When a component fails or the engine is not operating correctly, emissions can increase and the vehicle may fail inspection.
A trouble code does not always mean that the named part is the problem. A proper diagnosis looks at the full system, including wiring, vacuum leaks, fuel delivery, exhaust condition, and engine performance.
Common Emissions Problems
- Check engine light
- Failed emissions test
- Oxygen sensor faults
- Catalytic converter efficiency codes
- EVAP leaks or loose fuel cap issues
- Exhaust leaks
- Engine misfires
- Rich or lean fuel mixture
- EGR system faults
- Mass airflow sensor issues
Emissions Services
- Check engine light diagnosis
- OBD-II code scan and testing
- Oxygen sensor testing and replacement
- Catalytic converter inspection
- EVAP smoke testing and repair
- Exhaust leak repair
- Fuel and ignition system testing
- Readiness monitor checks
Code Scan
System Testing
Repair Check
Failed Emissions Test Help
After repair, the vehicle may need to complete an OBD-II readiness cycle before it can pass certain emissions inspections. We can explain what is needed based on your vehicle and inspection requirements.
If your vehicle failed emissions or the check engine light is on, contact AP Automotive for emissions diagnostics and repair.