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DTC codes / P0Dxx · Hybrid propulsion / P0D2B

P0D2BControl Pilot Indicator Control Circuit/Open

P0D2B indicates that the powertrain control module has detected an open circuit on the control pilot indicator control circuit, which is part of the electric vehicle charging system that communicates charging status to the driver. The computer monitors the voltage or current on this circuit and sets the code when the expected signal is missing, indicating a break in the wiring or a failed component.

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

Symptoms you may notice

  • Charging indicator light on the dashboard fails to illuminate or flashes erratically during charging.
  • The vehicle may not initiate charging or may stop charging unexpectedly.
  • A warning message related to the charging system appears on the driver information display.
  • Often no symptoms besides the warning light, especially if the fault is intermittent.
  • The charging port door may not lock or unlock properly if the indicator circuit is shared with other functions.
  • In some cases, the vehicle may refuse to start or enter ready mode if the charging system fault is severe.

Common causes, most likely first

  1. Broken or chafed wire in the control pilot indicator circuit, often near the charge port or along the harness.
  2. Corroded or loose electrical connector at the charge port indicator or at the control module.
  3. Failed control pilot indicator lamp or LED assembly.
  4. Faulty body control module or powertrain control module driver for the indicator circuit.
  5. Water intrusion into the charge port assembly causing an open circuit.
  6. Rodent damage to the wiring harness in the charging system area.

How to diagnose and fix it

  1. Connect a scan tool and verify P0D2B is current, then check for related codes in the charging system and body control modules.
  2. Inspect the charge port indicator lamp and connector for corrosion, damage, or loose pins; clean and reseat as needed.
  3. Perform a visual inspection of the wiring harness from the charge port to the control module, looking for chafing, breaks, or rodent damage.
  4. Use a digital multimeter to check continuity and resistance on the control pilot indicator circuit between the control module and the indicator lamp.
  5. Test the indicator lamp with a known good power source to confirm it operates; replace if defective.
  6. If the circuit and lamp are good, check for power and ground at the control module connector and verify the module is commanding the indicator on.
  7. Repair or replace the faulty wiring or component, clear the code, and test the charging system operation.

Charge Port Indicator Circuit Quirks

  • A common oversight is assuming the control pilot indicator is the same as the charging status light on the dash; they are separate circuits, and a fault in one does not always affect the other.
  • Intermittent opens often occur at the hinge point of the charge port door, where the wire flexes each time the door is opened, leading to a break that only shows when the door is in a certain position.
  • Some vehicles use a pulse-width modulated signal on the indicator circuit, so a standard test light may not reveal the fault; an oscilloscope or a meter with duty cycle capability is needed.
  • Aftermarket charging accessories or improper previous repairs to the charge port can introduce resistance or open circuits that trigger this code, so always inspect for non-factory wiring.
  • The code can be set by a completely discharged 12-volt battery causing a momentary open circuit during cranking, so always check battery condition and charging system first.

Can I keep driving with P0D2B?

The vehicle may still be drivable, but charging could be unreliable or unavailable, leaving you stranded with a depleted high-voltage battery. Avoid long trips until the fault is repaired, and do not attempt to bypass or modify the charging system wiring.

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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