P0E73 code meaning
Control Pilot Signal High Frequency
What P0E73 means
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.
P0E73 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyEasy, DIY possible
- Typical labor0.2 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0E73
- AC charging refused or stopped shortly after start
- Fault tied to a specific station or cable
Common causes of P0E73
- PossibleElectrical interference or ringing on the pilot line
- PossibleCharging station with a faulty pilot oscillator
- PossibleDamaged charging cable or corroded charge port pin
- Less likelyFaulty pilot input in the on-board charger
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Control pilot signalEvse
What each part of P0E73 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 73 | The exact fault in that area. |
What to do next
- Note P0E73 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0E73
What does P0E73 mean?
P0E73 means "Control Pilot Signal High Frequency". P0E73 is set when the control pilot pulses from the charging station arrive faster than the nominal 1 kHz. It is a generic code, so it means the same on every make.
Is it safe to drive with P0E73?
P0E73 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P0E73 fail an emissions test?
P0E73 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P0E73 to fix?
Difficulty: easy. A typical repair takes 0.2 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P0E73 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.