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Message: <blockquote data-quote="MasTec1970" data-source="post: 2495759" data-attributes="member: 854060"><p>Don't want to break your heart but it is likely you have a failed throttle body assembly! P1515 is Control Module Throttle Actuator Position Performance, Although it is very rare for it to set P1515 alone without P1516 which is (TAC) Module Throttle Actuator Position Performance! to test (with the key off) check the throttle plate for binding by manually moving the plate through it's full arc and feeling for spring tension! If you are sure that the P1515 is the ONLY code stored It is likely that you have a failed ignition switch! To test you need a volt ohm meter and check the voltage to these fuses in the under hood fuse block (with the ignition in the run position 16, 18, 20, 22, 23, 26, 27, 28, and 29 all of these fuses should show battery voltage or within 1/2 (0.5) volt of battery voltage!</p></blockquote><p></p>