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1998 Oldsmobile Intrigue Question: p401 egr problems



Joe321, Florissant, MO, November 15, 2009, 22:12

keep getting a P401 code. I just replaced the intake manifold gasket, and a couple days later this code started. Can clear it, but a couple weeks later the code will come back. Seems to run a little rougher than before. Do I have something in the egr tube. I replaced the tube from the intake manifold when I did the gasket.

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  • Answer #1

    November 15, 2009, 22:45

    Symptom: Diagnostic Trouble Code P0401

    System: Emissions/PCM/Fuel

    Codes: P0401

    Problem: Positive Crankcase Ventilation Valve (PCV) is missing. Oring for the PCV is missing or the incorrect PCV valve was installed.

    Test & Fix: Remove plastic cover for the Positive Crankcase Ventilation (PCV) Valve and inspect Oring for being missing or damaged. Verify the PCV is the correct application or if the upper intake has just been replaced make sure a PCV valve has been installed. Replace the O ring or PCV valve as necessary to correct the condition.

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    Joe321, November 16, 2009, 20:23

    That is probably right. The pcv sits under the map sensor and I don't think I put it in tight. Thx a lot!!!

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