Car Diagnostic & Programming · Chicago
Emissions Test Prep in Chicago
Failed, or worried about failing, your Illinois emissions test? C & A Auto Body Shop diagnoses and repairs the issues that cause emissions test failures.
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I-CAR & ASE
Certified technicians
All insurers
Claims handled in-house
Since 1952
Family-run in Chicago
Is this what you need?
When drivers book emissions test prep.
The situations below are the most common reasons Chicago drivers reach out to us, and each one is something our technicians handle regularly, not as a rare exception.
Emissions test prep and repair helps identify and fix the issues causing your vehicle to fail, or risk failing, its required Illinois emissions test, so you can pass with confidence.
Drivers who failed an Illinois emissions test
If this sounds like your situation, we can walk you through your options during a free visit near O'Hare.
Anyone with a check engine light before an upcoming test
We work with Chicago drivers in this exact situation on a regular basis.
Drivers wanting to confirm their vehicle will pass before testing
This is one of the most common reasons local drivers reach out to our shop.
What's included
Everything covered in the job.
Diagnostic scan for emissions-related issues
This is included at no extra charge as part of your visit, and our technicians never skip it, even on smaller jobs.
Explanation of what's causing a failed or at-risk result
We handle this step carefully so your repair stays on schedule and holds up over time.
Repair of the underlying issue
This is one of the details that separates a quick fix from a lasting, professional repair.
Guidance on next steps for retesting
Getting this right is what makes sure the underlying problem is actually resolved, not just masked.
We diagnose the specific cause of emissions issues using professional equipment, rather than replacing parts by guesswork.
Not sure if this is the right repair?
Send a photo of the damage and we'll tell you what it needs — often without you leaving the driveway.
How it works
How the repair actually runs.
- 01
Bring your vehicle in for a diagnostic scan
We keep you informed throughout this step so there are no surprises along the way.
- 02
We identify the cause of the emissions issue
This is where our experience with Chicago vehicles really matters.
- 03
You approve a clear estimate
Most customers are surprised at how quickly this step moves once their vehicle is with us.
- 04
Our technicians complete the repair
We double check our work at this stage before moving on to the next part of the process.
- 05
Guidance on retesting your vehicle
This step is designed to protect both the quality of the repair and your vehicle's long-term reliability.
Getting an estimate
Free estimates — quoted from your car, not a price list.
Every job gets its own estimate
No two repairs are the same, so we don't quote from a price list. We look at the actual damage — in person or from photos — and give you a written, itemised estimate before any work starts.
- Estimates are free and carry no obligation.
- You approve the written estimate before we touch the car.
- If hidden damage shows up mid-repair, we call you before anything changes.
Insurance job? We handle it.
For covered repairs we work directly with your insurance company — the paperwork, the photos, the supplements — and bill your carrier. You pay your deductible and that's it.
Paying out of pocket instead? The same written estimate applies either way.
What customers say
Chicago drivers who keep coming back.
“I have never met a more professional, attentive and caring team. Javier worked on my car and made sure it was in perfect condition before I left. He explained what was happening with my car so I felt confident in his work. 10/10 would recommend!”
“Great service! I always take my car for repairs to Jorge. He is super knowledgeable and has fair prices. I highly recommend this place.”
“Amazing job! Very professional and efficient. I recently had some damage and they replaced, fixed and painted asap. I was so appreciative. Definitely recommend.”
Questions before you book
Emissions Test Prep FAQ
Related services
Other work we do on the same visit.
Need emissions test prep in Chicago?
Send photos of the damage and get a free written estimate back the same business day.
- Call
- (773) 775-6163
- Hours
- Mon–Fri 8AM–5PM