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DTC P263E - Glow Plug Control Module 1 Over Temperature

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.
P263E - GLOW PLUG CONTROL MODULE 1 OVER TEMPERATURE

Description:  This DTC sets when the glow plug control module (GPCM) indicates an internal software error has occurred.
Possible Causes: 
  • An attempt was made to change the calibration
  • Aftermarket performance products
  • GPCM programming error
  • Internal GPCM error
Diagnostic Aids:  Disconnect all GPCM connectors and inspect for damage such as pushed out pins or corrosion and repair as necessary. Connect all GPCM connectors.
Clear the DTCs. Carry out the key ON, engine running (KOER) Glow Plug Monitor self-test. If the DTC is retrieved again, turn the ignition OFF and wait for 2 minutes.
Reprogram the GPCM or update the GPCM calibration.
Clear the DTCs. Carry out the KOER Glow Plug Monitor self-test. If the DTC is retrieved again, install a new GPCM. Refer to the appropriate Glow Plug System article.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.
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