Check Engine Light and Code P1416: GMC V1500 Suburban Muffler & Exhaust

Problem overview

The 1998-1999 GMC Suburban 1500 has a known issue with the air pump check valve which causes illumination of the check engine light. There are no notable symptoms, but the vehicle will not pass state inspection or smog testing.

When the valve fails, it sticks closed, and the computer sets the code P1416. Replacement of the check valve is the only fix, as the valve is not serviceable.

This page can provide more information about the air pump check valve.

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GMC V1500 Suburban vehicles with this problem

2 model years affected

1999 GMC C1500 Suburban

1998 GMC C1500 Suburban

1999 GMC C1500 Suburban

1998 GMC C1500 Suburban

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Check Engine Light and Code P1416 on GMC V1500 Suburban

Problem overview

GMC V1500 Suburban vehicles with this problem

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