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Home >> Oldsmobile >> 2000 >> Intrigue GL >> Repair and Diagnosis >> External Pages >> Different car >> Section 82 (Engine Control System Self-Diagnostics - 3.4L) >> Diagnostic Tests >> DTC P0404: EGR System >> Test Description
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Test Description

WARNING: This page is about a different car, the 2002 Pontiac Grand Am, 2002 Oldsmobile Alero, 2002 Chevrolet Monte Carlo, and 2002 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers in the diagnostic procedures.

  1. 2

    This step verifies that the malfunction is present.

  2. 3

    If DTC P0404 will only set during certain conditions, the malfunction may be intermittent. Refer to Diagnostic Aids. If an intermittent wiring problem is not present, test for a faulty connection at the PCM or the EGR valve. If the connections are okay, and if DTC P0404 continues to set, replace the EGR valve.
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