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ASE CERTIFIED • NORTH PHOENIX & PEORIA, AZ
Emissions Repairin Phoenix and Peoria, AZ
Failed the test? Bring us the report. We diagnose the actual fault and repair it so the car passes the retest — we are a repair shop, not a testing station.
- ASE Certified Technicians
- RepairPal Fair-Price Estimates
- 24-Month / 24,000-Mile Warranty
EMISSIONS REPAIR
We do the repairs. The state does the testing.
Arizona emissions testing is run by the state at its own stations — we cannot test or certify your vehicle, and neither can any other repair shop. What we can do is the part that actually gets you through: finding out why it failed and fixing it, so the retest is a formality.
A failure report is a good starting point but it is not a diagnosis. A high-reading tailpipe, an incomplete readiness monitor and an illuminated check-engine light are three different problems with three different repairs, and the same trouble code can be caused by half a dozen faults. We test to find which one you have rather than replacing the part the code is named after.
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Bring us the failure report
It tells us what to test — it does not tell us what to replace. -
Readiness monitors handled properly
A car with a recently cleared computer fails for that alone. We know the drive cycles. -
Catalytic converters diagnosed, not guessed
The converter is often the victim of an upstream fault, not the cause. -
24-month / 24,000-mile warranty
On parts and labor for the work we do.
WHY CARS FAIL
The common reasons vehicles fail emissions
Most failures come down to one of these — and most of them are repairable without touching the converter.
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Check engine light is on
An illuminated light is an automatic failure in Arizona, whatever the tailpipe reads.
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Readiness monitors not set
Clear the codes right before the test and the car fails for being untested. It needs a proper drive cycle.
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Oxygen sensor faults
A lazy or failed sensor makes the engine run rich and pushes readings up. One of the most common causes.
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Catalytic converter efficiency
Sometimes the converter really has failed. Often it was killed by a misfire or an oil leak that is still there.
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EVAP system leaks
A leaking purge valve, a cracked hose or, genuinely, a loose fuel cap. Cheap to fix once located.
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Misfire or rich running
Ignition and fuel faults raise emissions directly, and a persistent misfire destroys the converter behind it.
WHAT YOU GET
What’s included in an emissions diagnosis
- Review of your state test report against what the vehicle is doing
- Full scan for stored, pending and permanent codes
- Readiness monitor status check
- Live data review — fuel trims, oxygen sensor response, misfire counts
- EVAP system testing where the failure points there
- Upstream and downstream oxygen sensor and converter efficiency analysis
- Written findings with a repair plan aimed at passing the retest
- Drive cycle completed after repair so the monitors are set before you go back
HOW IT WORKS
No surprises, start to finish
01
Book in 60 seconds
Pick a time online or call us, and bring the failure report from the state station with you.
02
We diagnose the failure
Codes, live data and system testing — aimed at the specific reason the vehicle failed.
03
You approve the price
A RepairPal fair-price estimate before anything is ordered, with the cheap causes ruled out first.
04
Repaired, drive-cycled, retested by the state
We make sure the monitors are set and the light is off before you go back for the retest.
WHY TRUST US
Honesty leads. Everything else follows.
Integrity
We recommend the repair you actually need — and tell you when you don’t need one yet.
Honesty
Photos of every worn part, so you can see for yourself what we’re quoting.
Transparency
RepairPal fair-price estimates and a written quote before any work begins.
4.9★
Google rating
ASE
Certified technicians
24 mo
24,000-mile warranty
5 mi
Free Uber or Lyft ride
QUESTIONS WE GET EVERY WEEK
Emissions FAQ
Do you do the emissions test?
No — Arizona emissions testing is done by the state at its own stations, and no repair shop can test or certify your vehicle. We do the repairs that get you through it. Bring us the failure report and we will take it from there.
My car failed. What do I do first?
Bring us the report. It tells us which part of the test failed, which narrows the diagnosis a great deal. Do not clear the codes first — that erases the evidence and resets the readiness monitors, which causes a second failure on its own.
Why did I fail with no check engine light?
Two common reasons: the tailpipe readings were out of limits, or the readiness monitors were not set — usually because the battery was disconnected or codes were cleared recently. The second one is fixed by driving the right cycle, not by replacing parts.
Do I need a new catalytic converter?
Sometimes, but far less often than people are told. A converter usually fails because something upstream — a misfire, a rich condition, an oil or coolant leak — destroyed it. Replace the converter without fixing that and the new one goes the same way.
How long before I can retest?
Once the repair is done the computer needs a drive cycle to set its monitors, which is typically a day or two of normal driving. We tell you what that looks like, and we check the status before you go back.
Which vehicles need testing in Maricopa County?
The state sets the rules and they depend on the vehicle’s year, fuel type and where it is registered — your renewal notice from the state is the authority on whether yours is due. We handle the repair side whatever the answer is.
Other services we handle
Full-service auto repair and maintenance under one roof in North Phoenix.
SCHEDULE WITH CONFIDENCE
Failed the test? Let’s get you through the retest.
17217 N Tatum Blvd, Phoenix AZ 85032 · Mon–Fri 7:30 AM–5:00 PM · Sat 7:30 AM–4:00 PM