Complete Diagnostic Services - Mishawaka, IN
Complete Diagnostic Services
Advanced Technology Meets Expert Vehicle AnalysisOur state-of-the-art diagnostic equipment and certified technicians quickly identify issues with your vehicle's complex systems. From engine performance problems to electrical faults, we provide accurate diagnoses that save you time and money on unnecessary repairs.
Complete Diagnostic Services
When your vehicle starts acting up, pinpointing the exact problem can be frustrating and time-consuming. At A-Plus Auto Service, our comprehensive diagnostic services take the guesswork out of automotive repairs by using state-of-the-art computer diagnostic equipment and decades of hands-on experience. Our certified technicians can quickly identify issues with your engine, transmission, electrical systems, brakes, and more, ensuring you get accurate answers and effective solutions.
We believe in transparent communication, which is why we provide detailed diagnostic reports that clearly explain what we found and what needs attention. Whether you're dealing with a check engine light, unusual noises, performance issues, or preventive maintenance needs, our thorough diagnostic process saves you time and money by targeting the root cause of problems rather than treating symptoms. Trust A-Plus Auto Service to get to the bottom of your vehicle's issues with precision and expertise.
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:
Modern vehicles can experience a wide range of issues that require professional diagnosis. Our advanced diagnostic equipment helps identify these common problems quickly and accurately.
Check Engine Light Issues
Dashboard warning lights indicate computer-detected problems that require diagnostic testing to retrieve trouble codes and identify the underlying issue causing the warning.
Engine Performance Problems
Rough idle, stalling, hesitation, or reduced power can stem from multiple causes including fuel system, ignition, or sensor malfunctions that diagnostic testing helps pinpoint.
Poor Fuel Economy
Sudden drops in gas mileage often indicate problems with fuel delivery systems, ignition components, or engine management sensors that control optimal operation.
Starting and Stalling Issues
When engines crank but won't start or immediately stall, diagnostic testing identifies problems with fuel delivery, ignition timing, or critical engine sensors.
Transmission Problems
Hard shifting, slipping, or delayed engagement requires diagnostic testing to determine whether issues are electronic, hydraulic, or mechanical in nature before costly repairs.
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.
Complete Diagnostic Services you can count on:
Accurate diagnosis requires more than simply reading trouble codes. We follow a systematic approach to identify the root cause of your vehicle's problems.
Customer Consultation
We begin by listening to your observations about when problems occur, what symptoms you experience, and under what driving conditions issues arise.
Computer System Analysis
Professional diagnostic equipment connects to your vehicle's computer systems to retrieve stored trouble codes and monitor live sensor data during operation.
Component Testing
Based on retrieved codes and symptoms, we test specific sensors, actuators, wiring, and connections to verify proper operation and identify failed components.
Visual Inspection
Thorough visual examination reveals problems like damaged wiring, loose connections, leaking gaskets, or worn components that may not trigger diagnostic codes.
Clear Explanation
We explain exactly what's wrong, why it happened, and what repairs are needed, providing written estimates before beginning any auto repair work.
A-Plus Auto Service
Michiana area drivers trust our diagnostic expertise because we combine advanced technology with experienced technicians to deliver accurate results every time.
Professional Grade Equipment
We use manufacturer-level diagnostic tools that provide detailed system information far beyond what basic code readers can access, ensuring accurate problem identification.
ASE-Certified Technicians
Our mechanics have over 70 years of combined experience and understand how vehicle systems work together to trace problems to their actual source.
All Makes and Models
From domestic to foreign vehicles and light trucks, we have the expertise and equipment to diagnose any make or model that comes through our doors.
Honest Assessment
We provide straightforward explanations of what we find, whether it's a simple fix or complex repair, and never recommend unnecessary work or services.
Warranty Protection
As a TechNet Professional Center, all our diagnostic work and subsequent engine repairs are backed by a comprehensive 3-year/36,000-mile nationwide warranty.
FAQ
Complete Diagnostic ServicesHere are some common questions about Complete Diagnostic Services. 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...