OBD-II code · Powertrain (generic)
P0E71 Control Pilot Signal Frequency Too High
The control pilot PWM frequency from the EVSE is too high. SAE J1772 requires 1 kHz +/- tolerance. The on-board charger negotiates voltage, current and safety with the EVSE; a fault interrupts charging or limits it to AC slow-charge despite a DC fast charger being attached.
Is it safe to drive with P0E71?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyEVSE PWM above 1 kHz spec
- PossibleEVSE oscillator drift
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Control Pilot Signal, Evse
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.