Smog Repair in Fair Oaks
When your vehicle fails a smog check, our expert team at San Juan Auto Smog diagnoses the cause, performs the necessary repairs, and retests your vehicle at the same STAR-certified station. We ensure your vehicle meets emissions standards so you can pass your smog check with confidence.
Smog CheckSmog Check + Oil ChangeOil Change Why drivers trust our repairsWhy choose San Juan Auto Smog for smog repair
We specialize in smog repair services for drivers in Fair Oaks, Carmichael, Citrus Heights, Orangevale, Gold River, Rancho Cordova, Folsom, Roseville, Sacramento, and nearby areas. Our experienced technicians diagnose and fix the issues causing smog check failures, helping you get back on the road quickly.
From check engine light diagnostics to emissions readiness monitor checks, we provide thorough repairs and retesting at our STAR-certified station to ensure your vehicle complies with California emissions standards.
- Expert diagnosis of smog check failures
- Repairs performed on-site at our STAR-certified station
- Clear and verify emissions readiness monitors
- Retesting after repairs to confirm compliance
- Friendly, honest service with no guesswork
Smog repair processHow we fix smog check failures
When a vehicle fails a smog check, our team uses emissions results and OBD-II scan data to diagnose the problem. We repair the faulty parts or systems, clear and verify readiness monitors, and retest your vehicle to ensure it passes.
Diagnose smog failure
Identify the cause of your smog check failure using emissions data and OBD-II diagnostics.
Learn about diagnosisRepair smog failure
Fix the parts or systems causing the failure to restore your vehicle’s emissions compliance.
Explore repair servicesRetest at STAR station
After repairs, we retest your vehicle at our STAR-certified station to confirm it passes emissions standards.
Book retest appointment Signs you need smog repairCommon reasons to visit for smog repair
You may need smog repair if you have:
- A failed smog check report
- The check engine light is on
- A gross polluter smog test result
- Readiness monitors not set or incomplete
Our team can diagnose and repair these issues to help you pass your smog check and keep your vehicle running clean.
Our smog repair services
- Smog Failure Diagnosis – Identify why your vehicle failed the smog check.
- Smog Failure Repair – Fix the faulty parts or systems causing the failure.
- Check Engine Light Diagnosis – Diagnose and address engine codes affecting emissions.
- OBD-II Diagnostic Testing – Scan your vehicle’s onboard system for emissions data.
- Emissions Readiness Monitor Check – Verify if your vehicle’s monitors are set for testing.
- Spark Plug Replacement – Replace worn spark plugs that can affect emissions.
- Oxygen Sensor Replacement – Fix faulty sensors that impact fuel and emissions.
- EVAP System Diagnosis and Repair – Repair leaks or faults in the evaporative emissions system.
- Catalytic Converter Diagnosis and Replacement – Address catalytic converter issues affecting emissions.
- EGR System Diagnosis and Repair – Fix exhaust gas recirculation system problems.
- Gross Polluter Smog Retest – Retest vehicles with high emissions after repairs.
Preparing for your smog repair visit
- Bring your smog check failure report if available
- Note any check engine light or warning indicators
- Be ready to discuss any recent vehicle issues or symptoms
- Allow time for diagnosis, repair, and retesting at our shop
Our team will guide you through each step and keep you informed throughout the repair process.
No guesswork, no surprisesPre-repair diagnostics and testing
Before starting repairs, we perform thorough diagnostics using emissions results and OBD-II scan data. This helps us pinpoint the exact cause of your smog check failure and plan the appropriate repairs.
- Check for active or pending trouble codes
- Verify emissions system readiness monitors
- Assess check engine light status and related issues
This diagnostic step ensures efficient repairs and increases the likelihood of passing your smog retest.
Retest after repairRetesting at our STAR-certified station
Once repairs are complete, we retest your vehicle at our STAR-certified station to confirm it meets emissions standards and passes your smog check.
Smog CheckSmog Check + Oil ChangeOil Change ReviewsWhat local drivers say about us
Real reviews from drivers across the Sacramento area.
★★★★★ 4.7 / 5 average · 2,122 reviews4.7 / 5 average · 2,122 reviews
AI SummaryCustomers consistently praise fast, friendly, professional service — knowledgeable staff, quick turnaround, clear honest pricing, and a genuinely helpful experience.
Customers consistently praise fast, friendly, professional service: knowledgeable, courteous staff, quick turnaround on smog checks and oil changes, clear explanations, and honest, fair pricing. Reviewers highlight how easy and stress-free the visit is, the welcoming team, and great value — earning loyal, repeat customers who happily recommend San Juan Auto Smog.
5★★★★★ Jun 11, 2026Easy to find, quick service & friendly associates!
AE Annabelle Eubank 5★★★★★ Jun 10, 2026Have been a years long customer the service was fast and courteous I highly recommend
CB Chaz Butler 4★★★★★ Jun 10, 2026Very helpful with information needed.quick service
PB Patty Burton 5★★★★★ Jun 10, 2026Scheduling was super easy and they were able to accommodate us to an earlier appointment. Friendly and fast!
MB Mrs. Babygoat 5★★★★★ Jun 09, 2026Requested an oil change on a Sunday morning. Was a good price and with the coupon they offer on their website made it better! Got to stop by the Carmichael Farmers Market and about 30 min go by and they're done with my car! Highly recommend them for their great and speedy service. Love that they're in the neighborhood 💖
CN Carissa Nguyen 5★★★★★ Jun 09, 2026Get service highly recommend
DN Darryl Newell 5★★★★★ Jun 09, 2026Staff is friendly, and professional. Waiting was 15 to 20 minutes max. Will definitely be back!
DD Daisy Duke 5★★★★★ Jun 08, 2026Staff was friendly. Super fast and easy. I am a repeat customer and will be going back again.
DD Darci Drawbert 5★★★★★ Jun 07, 2026Very satisfied, be back for my other vehicle for Smog and future oil changes with a discount. I’ll give it a try.. (: only 2 minor concerns mechanic push down my Ebreak all the way down to the floor and don’t go all the way to the floor wasn’t necessary. Also after the completed work he closed my hood was a little bit too hard. I like to go easy. Overall still five star service.. thank you nice to be open on Sunday.
AV Andrew Vasquez 5★★★★★ Jun 07, 2026First time using this business, made an appointment to have my car Smog..I have never been able to make an appointment and normally have to wait. The technician was ready when I arrived and was done in about 15 minutes.I highly recommend this shop.
VB Vernon Brown 5★★★★★ Jun 05, 2026Everything was done quickly. I didn't have to wait in line, which is very pleasing. They also work on Sunday.
AA Anastasiia Antysheva 5★★★★★ Jun 04, 2026Quick , prompt, friendlyI don’t want anything more or less than the job done rightThat’s what to expect from San Juan auto smog
JA Johnny Amen 5★★★★★ Jun 03, 202610/10 convenience, speed, customer support
AC Austin Caccavo Smog repair servicesExplore our smog repair service pages
Smog Failure Diagnosis
Identify the cause of your smog check failure with expert diagnostics.
Smog Failure Repair
Repair the parts or systems causing your smog check failure.
Check Engine Light Diagnosis
Diagnose check engine light issues affecting emissions.
OBD-II Diagnostic Testing
Scan your vehicle’s onboard system for emissions data.
Emissions Readiness Monitor Check
Verify if your vehicle’s monitors are set for testing.
Spark Plug Replacement
Replace worn spark plugs that can affect emissions.
Oxygen Sensor Replacement
Fix faulty oxygen sensors impacting fuel and emissions.
EVAP System Diagnosis and Repair
Repair leaks or faults in the evaporative emissions system.
Catalytic Converter Diagnosis and Replacement
Address catalytic converter issues affecting emissions.
EGR System Diagnosis and Repair
Fix exhaust gas recirculation system problems.
Gross Polluter Smog Retest
Retest vehicles with high emissions after repairs.
Need smog repair today?
Text (916) 961-6009 with questions or book an appointment online. We handle diagnosis, repair, and retesting all at our STAR-certified station in Fair Oaks.
Smog CheckSmog Check + Oil ChangeOil Change