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#1
03-21-2004, 08:56 AM
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P1221=TP Sensor 1, 2 Performance
This is a 2001 suburban with a 5.3 i had a check eng light and reduced engine power was displayed, the code is P1221(Throttle Positioning sensor 1,2 performance) Can any one tell me where this sensors are located?and what this means.
Last edited by tonyr198; 03-21-2004 at 09:51 PM. 
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