2003 Cadillac Escalade Esv 4 Codes Attached They Follows P2135 P1516 P0220

2003 CADILLAC ESCALADE ESV
146 MILES
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SHANNONGUY
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  • 1 POST
My 2003 Cadillac Escalade ESV has 4 codes attached to it they are as follows: P2135, P1516, P0220, P0120 (these codes are from Auto Zone) I'm told either my trottle or trottle sensor may be going bad that was 1/7/13. Today, 1/10/13, I heard a distrubing humming sound coming from the rear of my truck near the gas tank area. Do you know what this could possibly be? Is this related to the trottle issue or something else that is going to cost me?
Jan 11, 2013 at 5:43 AM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
humming is fuel pump. not related

the other codes, are most likely a bad throttle body for the fly by wire system

Roy
Jan 11, 2013 at 10:24 AM
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