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98 suburban Code po140

Discussion in 'Chevy Suburban Forum (GMC Yukon XL)' started by Billy D, Mar 30, 2014.

  1. Billy D

    Billy D New Member

    Got the check engine light with code PO140 when scanned. I've heard several different items it could be and would rather get advice on a simple order to check or replace things.

    Ive vey reset the code twice and it comes back. I just did again to see how long before light comes back.

    Any advice would be greatly appreciated.
  2. paracutin

    paracutin New Member

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