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DTC P1121: TP Sensor Signal Lower Than Expected

NOTE: Before you troubleshoot, record all freeze data and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).
  1. Turn the ignition switch ON (II).
  2. Check the throttle position with a scan tool or the HDS.

    Is 9.4% or more indicated when the throttle is fully opened? 

    1. YES -  Intermittent failure, system is OK at this time.
    2. NO -  Replace the throttle body (see THROTTLE BODY REMOVAL/INSTALLATION ).