Question 1

What does P1491 mean?

Accepted Answer

P1491 - EGR Valve Lift Insufficient (Honda). Honda-specific: The EGR valve is not lifting/flowing enough.

Question 2

What are the symptoms of P1491?

Accepted Answer

Check engine light, May fail emissions, No drivability issues usually

Question 3

What causes P1491?

Accepted Answer

Carbon-clogged EGR valve, Failed EGR valve, Clogged EGR ports in intake manifold, Vacuum supply issue

Question 4

How much does it cost to fix P1491?

Accepted Answer

Typical repair cost: $50-$400. Remove and clean the EGR valve and its ports in the intake manifold. Honda EGR ports are notorious for clogging with carbon.

P1491 — EGR Valve Lift Insufficient (Honda)

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Common symptoms of P1491

Common causes of P1491

Repair cost & difficulty

Vehicles commonly affected

Related trouble codes