Powertrain, generic (extended)

P2E4F Battery Charger Coupler Temperature Sensor D Circuit

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2E4F is the general circuit fault of the fourth inlet temperature sensor, used when the wiring is clearly wrong but not classed as low, high or implausible; the D row has no intermittent code either. Ford is the one maker whose public papers show a sensor D in use: SSM 55080 names P2E53, the overheating verdict for point D, stored in the secondary OBD module (SOBDM) of the Mustang Mach-E, E-Transit and F-150 Lightning, so that module reads sensor D. Ford does not publish P2E4F or say which pin D watches. A fourth point makes sense because, as TE patent US11329436 puts it, each DC contact above 200 A needs its own monitoring and a 90 °C contact must be reported within 30 s. On the smart with 22 kW charger, Mercedes traced inlet sensor codes to loose low-voltage plugs at the charger (LI54.10-P-067823).

Likely causes

Low-voltage connector between inlet harness and evaluating module loose (smart for sensor A)
Sensor D wiring chafed or broken
Temperature element D failed (normally replaced with the inlet)
Measuring input in the SOBDM or charger defective

Symptoms

  • DC fast charging refused or limited
  • Charging warning in the cluster
  • Fault may only show with a warm or cold inlet

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–1,500
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

charge port temperature sensorwiring harnesson board charger

Related codes

P2E50P2E51P2E52P2E53P2E4AP0EE7

References: static.nhtsa.gov, image-ppubs.uspto.gov, static.nhtsa.gov, law.cornell.edu.