Emission Leak Testing - Mishawaka, IN
Emission Leak Testing
Keep Your Vehicle Clean and CompliantOur certified technicians use advanced diagnostic equipment to detect and repair emission system leaks that can cause your vehicle to fail inspection. We'll identify issues quickly and get you back on the road with confidence, ensuring your car meets all environmental standards.
Emission Leak Testing
When your vehicle fails an emissions test or you notice unusual exhaust smoke, emission leak testing is the critical first step in diagnosing the problem. At A-Plus Auto Service, our certified technicians use advanced diagnostic equipment to pinpoint exactly where harmful gases are escaping from your vehicle's emission control system, ensuring accurate repairs and compliance with environmental regulations.
Our comprehensive emission leak testing service examines your entire exhaust system, including the catalytic converter, oxygen sensors, and emission control valves. We identify leaks that can cause your vehicle to fail state inspections, reduce fuel efficiency, and contribute to air pollution, providing you with detailed results and honest recommendations for necessary repairs.
Afterhours Drop-off
Pickup a form from our front door. Fill out what issues/services you need and follow the instructions.24/7 Secure Pickup
Get your serviced vehicle afterhours. Our secure key pickup is located outside our front door.50-point Digital Inspection
We provide a no-cost 50-point digital inspection on all oil changes with a text/email notification with full details.Parts & Labor Warranty
3 years or 36,000 mile nation-wide warranty on all new parts and labor.Common problems professional auto repair services can resolve:
Emission system leaks often start small but can cause noticeable symptoms that indicate your EVAP system needs professional attention.
Check Engine Light
The most common sign is a persistent check engine light with diagnostic codes starting with P04, including P0440, P0442, P0455, and P0456 that specifically indicate EVAP system problems.
Fuel Odors
Smelling gasoline around your vehicle, especially near the fuel tank area, indicates vapor leaks that allow fuel fumes to escape into the atmosphere instead of being captured by the EVAP system.
Gas Pump Issues
Difficulty filling your tank when the pump repeatedly clicks off before full indicates pressure buildup from a malfunctioning EVAP vent valve or vapor recovery system.
Poor Fuel Economy
Large EVAP leaks that allow fuel vapors to escape can gradually reduce your vehicle's fuel efficiency as the engine management system compensates for the lost vapors.
Our Process
We set expectations from the start, so you can rest assured your vehicle is handled with care at A-Plus Auto Service.
Schedule Your Appointment
Contact us now to schedule your appointment to evaluate your vehicle.
Schedule Appointment
Get Your Vehicle Inspection Report
We inspect and diagnose your vehicle, then provide you with a report and service options.
We Service Your Vehicle
Based on your service selection, we work diligently on your vehicle to completion.
Emission Leak Testing you can count on:
We use systematic diagnostic procedures and professional equipment to locate even the smallest leaks in your vehicle's evaporative emission system.
Code Analysis
We retrieve and analyze diagnostic trouble codes from your vehicle's computer to identify which part of the EVAP system is triggering the problem and guide our testing approach.
Visual Inspection
Our technicians inspect all visible EVAP components including hoses, connections, charcoal canister, purge valve, and vent valve for obvious damage, cracks, or loose connections.
Smoke Testing
We introduce harmless smoke into the sealed EVAP system using professional equipment. The smoke escapes from any leak point, making even tiny leaks clearly visible for precise repair.
Component Testing
Individual components like purge valves and vent valves are tested electronically to verify they open and close properly when commanded by the engine computer system.
A-Plus Auto Service
Our combination of advanced diagnostic equipment, experienced technicians, and commitment to accurate diagnosis sets us apart for emission system repairs in the Michiana area.
Professional Equipment
We use professional-grade smoke testing machines and diagnostic scanners that can detect even the smallest EVAP system leaks that basic equipment might miss.
ASE-Certified Technicians
Our mechanics have over 70 years of combined experience and maintain ASE certifications. They understand EVAP systems and know how to interpret diagnostic data for accurate repairs.
Accurate Diagnosis First
We locate the actual source of leaks before recommending any parts replacement, saving you money by avoiding unnecessary repairs and ensuring the problem is fixed right the first time.
Nationwide Warranty
All emission system repairs are backed by our comprehensive 3-year/36,000-mile TechNet Professional warranty, giving you confidence in our work wherever you travel.
FAQ
Emission Leak TestingHere are some common questions about Emission Leak Testing. For answers to additional questions specific to your needs, please contact us now by phone. We're happy to help!
Deb Frecka
March 3, 2026
I've been taking our cars to A Plus Auto since 2008. The service is great and he people are friendly and helpful. Highly recommended!
Pachia Rumble
August 22, 2025
I took my car to A pllus auto because blinkers stopped working on my car. And wind shield wiper would only work on high. After countless hours of trying to fix the problem, the module in the steering ...
Tommy Dutrieux
August 15, 2025
I dropped my mom's car here to have an exhaust leak checked out. About an hour later Todd called me and asked me to come back to the shop and go over the repair estimate. When I arrived he still had...
Teresa Covarrubias
July 29, 2025
I had just bought my car when the AC started acting up. The dealer I got it from initially refused to check it, so I brought it to A-Plus Auto Service. They gave me a quote—better than any other sho...