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Ron Z.
Ron Z., - Auto Tech -
Category: Car
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Experience:  18+yrs. experience diagnostics & repair of all makes/models.
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I have a DTC code P1421 on a 2006 suzuki grand vitara. what next

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I have a DTC code P1421 on a 2006 suzuki grand vitara. what next
Welcome to JustAnswer.com! My name is DriveFast71(Ron) and I will do my best to answer all of your questions completely and accurately.


The P1421 is pointing to a fault in the EVAP Vent Valve (aka EVAP Leak Check Module) being either stuck open or closed. This valve is located under the vehicle, mounted to the EVAP Canister. Inspect the wire harness and electrical connector for any loose or broken wires. Inspect the canister itself for any cracks, or signs of leakage. If this all checks out, suspect a faulty Vent Valve.
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