★ Pass California Smog The First Time ★

Smog Failure Repair That Gets You Legal

California has the strictest emissions laws in the country. A failed smog isn't just inconvenient — you can't register your vehicle until you fix it. We specialize in CARB-compliant smog repair, and we know what the BAR really requires. No shortcuts, no illegal parts, no surprises. A licensed Supercanic repair facility in California.

Honest Diagnosis Written Estimates 12-Month Warranty OE-Grade Parts Locally Owned
★ When To Bring It In ★

Signs You Need This Service

Failed your most recent smog check
Check engine light on (automatic smog fail)
Smog readiness monitors won't set
P0420 / P0430 catalytic converter codes
P0171 / P0174 lean codes
EVAP codes (P0440, P0442, P0446, P0455, P0456)
O2 sensor codes (P0130–P0167)
Visible smoke from exhaust
★ How We Do It ★

Our Test, Diagnose & Repair Process

01

Review Your Smog Failure Report

California smog reports are detailed. We read them carefully — emissions exceedances, visual inspection failures, functional test failures, OBD-II readiness issues. Each failure points to specific repairs.

02

Diagnose The Root Cause (Not The Symptom)

A P0420 code doesn't always mean the catalytic converter is bad — it can be O2 sensors, exhaust leaks, fuel trim issues, or a failing engine. We diagnose properly before recommending a $1,200 cat.

03

Repair With CARB-Compliant Parts

California requires Executive Order (EO) numbers on catalytic converters and many emissions components. We install only CARB-legal parts — and we keep the paperwork to prove it.

04

Verify Repair With Mode 6 Data

After repair we drive the vehicle through a full drive cycle while watching Mode 6 (the OBD-II emissions data the smog station will see). If the cat efficiency monitor is still failing, we catch it here, not at the smog station.

05

Set All Readiness Monitors

California requires all OBD-II monitors to be 'ready' for a smog pass (one allowed not-ready in some cases). We drive the specific drive cycle for your vehicle to set all monitors before you go to the smog station.

06

Repair Verification & Smog Referee Documentation

We provide repair documentation. If your vehicle qualifies for the State's Consumer Assistance Program (CAP) for income-qualified residents, we can perform repairs as a licensed BAR shop and document everything for the program.

★ Real Tools. Real Parts. ★

How We Get It Right

What We Use

  • OBD-II Scan Tool With Mode 6 Access — California uses Mode 6 data — most basic scanners can't read it. We can.
  • Smoke Machine — EVAP leaks (the most common smog failures) are found with a smoke machine. Cheap to test, easy to find, fixable.
  • Wideband O2 Sensor Tester — Verifies sensor health beyond just 'is it working.'
  • Fuel Pressure Tester — Lean codes (P0171) are often fuel-related, not just vacuum leaks.
  • Mitchell & Identifix Subscriptions — California-specific repair procedures, TSBs, and emissions repair guidance.
  • BAR-Approved Inspection Tools — We follow California Bureau of Automotive Repair procedures.

What We Install

  • CARB-Legal Catalytic Converters — California-approved with EO number. The aftermarket cats sold cheap online are illegal here — we don't install them.
  • OE-Grade O2 Sensors — Denso, Bosch, NGK — California ARB-approved. We replace upstream and downstream where required.
  • EVAP System Components — Purge valves, vent valves, fuel caps, charcoal canisters — common smog failure points.
  • Gas Caps — Sounds simple but a $20 gas cap fixes a lot of smog failures.
  • Engine Sensors — MAF, MAP, IAT, ECT — many smog failures trace back to a $60 sensor.
  • Vacuum Lines & Intake Gaskets — Vacuum leaks cause lean codes, P0171, and smog fails.
★ The Supercanic Promise ★

12-Month / 12,000-Mile Warranty

Standard on most repairs. Parts and labor. If something we touched fails, we fix it again — no charge, no argument. That's how locally-owned shops have to operate.

Ready To Get It Fixed Right?

951 ★ 474 ★ 0744

★ Mon–Sat 7AM–6PM ★ 1685 S State St, San Jacinto, CA ★

★ Common Questions ★

Frequently Asked

Why did I fail smog if my check engine light is off?
California tests both OBD-II AND tailpipe emissions on some vehicles. You can pass the OBD test but fail tailpipe — that means the engine is dirty or the catalytic converter isn't working well, even without a code.
Can you do a smog check?
We are a repair-focused shop. We don't do smog inspections, but we work hand-in-hand with smog stations and we know exactly what they test. Your repaired vehicle goes to a smog station and passes.
Why are CARB-legal cats so expensive?
California Air Resources Board requires extensive testing for cats sold here. The certification costs the manufacturer money — which is why CARB-legal cats are $400–$1,200 instead of $150. It's the law, and we follow it.
Can I clear the check engine light and pass smog?
No — California requires OBD-II monitors to be 'ready' (set after recent drive cycles). Clearing codes resets all monitors to 'not ready' and you'll fail immediately on the OBD portion.
Will I qualify for state smog repair assistance?
California's Consumer Assistance Program (CAP) helps income-qualified residents pay for smog repairs (up to $1,200 toward repairs at a licensed Test & Repair station). Eligibility is income-based. We can point you to the application.
★ Related Services ★

Other Repairs We Do