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DTC P0221: Throttle Position (TP2) Sensor Circuit Range/Performance

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2005 Mercury Sable, 2005 Mercury Mountaineer, 2005 Mercury Monterey, 2005 Mercury Montego, and 2005 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.
P0221 - THROTTLE POSITION (TP2) SENSOR CIRCUIT RANGE/PERFORMANCE

Description:  The electronic throttle control (ETC) TP2 sensor was flagged as fault status by the powertrain control module (PCM) indicating an out of range in either the closed or wide open throttle (WOT) modes.
Possible Causes: 
  • Binding throttle linkage
  • Damaged throttle body
  • TP circuit open to PCM
  • Damaged TP sensor
  • SIG RTN circuit open to the TP sensor
  • Self-test operator error (foot resting on the accelerator pedal during test)
Diagnostic Aids:  The fault exhibits a symptom of limited power. A TP2 PID (TP V PID) reading greater than 96.42% (4.65 volts) during key on engine off (KOEO) or key on engine running (KOER) indicates a hard fault.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to DV: Throttle Body Assembly ETC STEP DV1.
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