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DTC P0488 - EGR Throttle Control Circuit A Range/Performance

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2018 Ford Transit-350 HD, 2018 Ford Transit-350, 2018 Ford Transit-250, 2018 Ford Transit-150, and 2018 Ford F-550 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
P0488 - EGR THROTTLE CONTROL CIRCUIT A RANGE/PERFORMANCE

Description:  This DTC sets when the PCM detects a concern with the intake throttle offset learn. When the intake throttle offset learn is greater than the expected intake throttle offset a concern is indicated.
Possible Causes: 
  • Damaged intake throttle position sensor
  • Binding or obstruction of intake throttle plate.
Diagnostic Aids:  The presence of this DTC may indicate that the vehicle is operating in derate mode and may experience a loss of power. After repair, the vehicle may still display a system warning message. Drive the vehicle until the system warning message has cleared from the instrument cluster message center.
Check the intake throttle for any binding or obstructions.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST AX .