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DTC codes / P0Exx · Hybrid propulsion / P0E68

P0E68Control Pilot Indicator Circuit Range/Performance

P0E68 indicates the powertrain control module has detected an out-of-range or performance fault in the control pilot indicator circuit, which is part of the high-voltage charging communication path on electrified vehicles. The computer monitors the pilot signal's voltage and duty cycle to confirm the charging station and vehicle can safely negotiate power delivery, and it sets this code when the signal does not behave as expected.

SystemPowertrain
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyProfessional
AreaHybrid propulsion

Symptoms you may notice

  • The charging indicator lamp on the dashboard may fail to illuminate or flash unexpectedly during plug-in.
  • The vehicle may refuse to start charging or stop charging shortly after the session begins.
  • A warning message about the charging system or high-voltage battery may appear on the driver information display.
  • The charge port door may not lock or unlock as expected when the connector is inserted.
  • Often no symptoms besides the warning light, with the vehicle otherwise driving and charging normally.

Common causes, most likely first

  1. A damaged or contaminated control pilot pin inside the vehicle charge port, often from debris or repeated connector insertion.
  2. Corrosion or water intrusion in the charge port connector or its wiring harness, leading to intermittent signal loss.
  3. A faulty charging station or EVSE (electric vehicle supply equipment) cable that does not provide a stable pilot signal.
  4. An open or shorted control pilot wire between the charge port and the onboard charger or controller.
  5. A failing onboard charger module that cannot correctly interpret or generate the pilot signal.
  6. A software or calibration issue in the charging control module that misreads a valid pilot signal.
  7. A poor ground connection at the charge port or charging module, causing reference voltage drift.

How to diagnose and fix it

  1. Inspect the charge port and connector pins for debris, corrosion, or physical damage, and clean or replace the port if needed.
  2. Test the control pilot circuit for continuity, shorts to ground, and correct reference voltage using a multimeter and the manufacturer's wiring diagram.
  3. Try a different known-good charging station and cable to rule out an external EVSE fault before condemning vehicle components.
  4. Check for technical service bulletins or software updates for the charging control module that address pilot signal interpretation.
  5. Perform a guided diagnostic using a scan tool that can read live control pilot duty cycle and voltage data while connected to a charger.
  6. Replace the onboard charger or charging control module only after confirming the pilot signal is present and correct at the module connector.
  7. Clear the code and verify the repair by completing a full charging session and confirming the code does not return.

What the pilot signal is really telling you

  • The control pilot is a low-voltage square wave that communicates available current and charging state, so a scope or duty-cycle meter often reveals problems a simple voltage check misses.
  • A charging station that works fine on another vehicle can still be the cause if its pilot signal is marginal, so always test with a second EVSE before replacing vehicle parts.
  • This code can set intermittently from a single bad plug-in event, and clearing it without inspecting the charge port often leads to a repeat visit.
  • Water intrusion in the charge port is a common missed cause, especially on vehicles that are parked outside or driven in heavy rain.
  • The control pilot circuit is separate from the high-voltage DC pins, so a vehicle can set P0E68 while still accepting a charge at reduced rate or only from certain stations.

Can I keep driving with P0E68?

The vehicle is generally safe to drive because the fault affects charging communication rather than propulsion, but avoid relying on charging until the circuit is inspected. Do not force a damaged connector into the charge port, and schedule service promptly to prevent a no-start condition from a depleted high-voltage battery.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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