Powertrain, generic

P0E73 Control Pilot Signal High Frequency

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0E73 is set when the control pilot pulses from the charging station arrive faster than the nominal 1 kHz. Above the permitted band the vehicle can no longer be sure that it decodes the duty cycle, and with it the allowed charging current, correctly; in practice it refuses or ends the session. Short spikes or ringing on the pilot line can mimic extra edges and be counted as a higher frequency, so cable condition and nearby interference matter as much as the station itself. No manufacturer documents P0E73 publicly. Simulation notes from Typhoon HIL describe the station side of this interface, a PWM signal of ±12 V at 1 kHz evaluated by a resistor network in the car. If the fault follows the vehicle across several stations, check the charge port and the charger's input. P0E72 is the low case.

Likely causes

Electrical interference or ringing on the pilot line
Charging station with a faulty pilot oscillator
Damaged charging cable or corroded charge port pin
Faulty pilot input in the on-board charger

Symptoms

  • AC charging refused or stopped shortly after start
  • Fault tied to a specific station or cable

Repair estimate

DifficultyEasyDIY possible
Parts and labour€0–600
Time0.2–2 h

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

Parts involved

control pilot signalevse

Related codes

P0E72P0CF4P0CF6

References: typhoon-hil.com, en.wikipedia.org, pnnl.gov.