Check Engine Light Due to Poor Exhaust Manifold Ground: INFINITI QX4 Muffler & Exhaust

Problem overview

The Check Engine Light may illuminate indicating a fault with two or more oxygen sensors. Our technicians tell us this may be caused by a poor ground between the cylinder head and the exhaust manifold.

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INFINITI QX4 vehicles with this problem

1 model year affected

1997 INFINITI QX4

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Check Engine Light Due to Poor Exhaust Manifold Ground on INFINITI QX4

Problem overview

INFINITI QX4 vehicles with this problem

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