TSB's

Vette Airflow DTC

This bulletin applies to 2005-2013 Chevy Corvettes (including Z08). The check engine light may be on, with DTC P0171 and/or P0174 set in history or current. If air flow to the air intake/air cleaner assembly is disturbed, these DTCs may be induced.

The condition may be caused by a gap between the upper radiator air baffle and the bumper beam combined with some beam holes. The gap and holes may cause an air flow disturbance to the air intake.

Remove the air cleaner assembly for access. Clean the bumper beam as necessary and install a sound deadener patch so that the holes are covered, so that no air can flow through these holes.

Evaluate the lean condition after the upper radiator air baffle gap has been repaired and the bumper beam holes have been covered. Note that any modifications that may have been made to the air intake/air cleaner assembly must be removed before attempting these repairs.

P/N …………………... PART

05973400.................... retainer, radiator air baffle (2)

P20617........................ Kent Automotive sound deadener patch pads (2)

This is a picture of the upper radiator air baffle with a large gap that needs to be repaired. Repair the gap in the panel by making sure the retaining clips are properly seated or by installing new retaining clips. To access these clips, the vehicle must be raised and the three bolts securing the lower radiator air baffle to the bumper beam need to be removed.
<p>This is a picture of the upper radiator air baffle with a large gap that needs to be repaired. Repair the gap in the panel by making sure the retaining clips are properly seated or by installing new retaining clips. To access these clips, the vehicle must be raised and the three bolts securing the lower radiator air baffle to the bumper beam need to be removed.</p>

This picture shows an upper radiator air baffle with a good fit (2), but the bumper beam holes (1) need to be covered with a good adhesive type patch.
<p>This picture shows an upper radiator air baffle with a good fit (2), but the bumper beam holes (1) need to be covered with a good adhesive type patch.</p>

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