How to Fix a Check Engine Light Before a Smog Check

If your check engine light is on, your car won’t pass a smog check. Here’s what to do, step by step.

Step 1: Find out why it’s on

A mechanic or many auto parts stores can read the trouble code for you. That code tells you where to start.

Step 2: Get it fixed

Take it to a mechanic you trust. Use original or CARB-approved parts.

We’re a test-only station, so we don’t do repairs.

Step 3: Drive it for a few days

After a repair, your car’s computer needs time to re-run its self-checks. Drive normally for a few days, often 100 to 200 miles with some freeway time.

Step 4: Come see us

Once the light stays off and you’ve driven a bit, you’re ready. Text us before you head over.

Repairs getting expensive?

California’s Consumer Assistance Program may help income-eligible drivers pay for emissions repairs.