Step 3 of 7 · Check Engine Light Decoded
Gas cap and EVAP
Gas cap and EVAP — step 3 of 7 in Check Engine Light Decoded. P0442 / P0455 / P0456: tighten the cap, inspect the seal, make sure it clicks. After body work or a car wash, a hose can be loose.
Free auto & mechanics tip: Gas cap and EVAP (step 3 of 7 from "Check Engine Light Decoded").
P0442 / P0455 / P0456: tighten the cap, inspect the seal, make sure it clicks. After body work or a car wash, a hose can be loose. Don't start with a $400 smoke machine for a cap that wasn't tight.
In the photo: Click the cap. It is the cheapest repair in this course.
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