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P2801 - Transmission Range Sensor B Circuit Range/Performance

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
P2801 - TRANSMISSION RANGE SENSOR B CIRCUIT RANGE/PERFORMANCE

Description:  The PCM checks the gear selector position by monitoring 3 independent voltage signals from the transmission range (TR) sensor. The TR voltages are then compared to an allowed voltage range for each gear. The test fails when the compared voltages are out of range. This DTC indicates that 2 or more TR signals are low or high.
Possible Causes: 
  • Two or three TR circuits shorted to ground or SIG RTN
  • Two or three TR circuits shorted to voltage or VREF
  • Two or three TR circuits open
  • Two TR VREF circuits open
  • Two TR SIG RTN circuits open
  • Two TR VREF circuits shorted to ground or SIG RTN
  • Damaged TR sensor
Diagnostic Aids:  See the diagnostic aids for DTC P2800.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All   refer to PINPOINT TEST TA .
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