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DTC codes / P2Dxx · Hybrid propulsion / P2D37

P2D37Hybrid/EV Battery Inductive Charger Input Circuit Range/Performance

P2D37 indicates that the hybrid or electric vehicle's inductive charging system has detected an out-of-range or poor-performance condition on the input circuit that feeds the charger. The computer monitors voltage and current at the charger's input and sets this code when the signal falls outside the expected window during operation or self-test.

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

Symptoms you may notice

  • The hybrid or EV warning light illuminates on the dashboard.
  • The vehicle may refuse to start or enter ready mode, especially if the high-voltage battery is depleted.
  • Inductive charging may not initiate or may stop unexpectedly during a charge session.
  • A message such as 'Check Charging System' or 'Service Vehicle Soon' appears in the driver information center.
  • Often no symptoms besides the warning light, particularly if the fault is intermittent.

Common causes, most likely first

  1. A loose, corroded, or damaged connector at the inductive charger input circuit.
  2. A faulty inductive charger input voltage or current sensor.
  3. Wiring damage (open, short, or high resistance) in the input circuit between the charge port and the charger.
  4. A failing inductive charger assembly or its internal power supply.
  5. A weak or failing 12-volt auxiliary battery causing low reference voltage.
  6. A software glitch in the charger control module requiring a recalibration or update.
  7. Water intrusion or contamination in the charge port or charger housing.

How to diagnose and fix it

  1. Perform a visual inspection of the inductive charger input connectors and wiring for corrosion, looseness, or damage.
  2. Check the 12-volt battery state of charge and ensure it is fully charged and in good condition.
  3. Use a scan tool to retrieve freeze-frame data and check for related codes in other modules.
  4. Measure voltage and resistance on the input circuit at the charger connector and compare to manufacturer specifications.
  5. Test the input current and voltage sensors with a multimeter or oscilloscope if accessible.
  6. If the circuit and sensors test good, follow the manufacturer's diagnostic flow for the inductive charger, which may require replacement.
  7. After repairs, clear codes and perform a charging system test to verify the fault is resolved.

Before you replace the inductive charger

  • A weak 12-volt battery is a common culprit because the charger control module relies on a stable reference voltage, and a low battery can set this code without any charger fault.
  • Corroded pins at the charge port connector often mimic a failed charger, so always inspect and clean connectors before condemning expensive components.
  • This code can be set by a temporary communication glitch during a charging session, so check for stored history codes and road-test before major repairs.
  • Some vehicles require a software update to the charger control module to correct false setting of this code, so check for technical service bulletins.
  • The input circuit may share grounds with other high-voltage components, and a bad ground can cause this code along with others; verify ground integrity.

Can I keep driving with P2D37?

If the vehicle still starts and drives normally, you can drive it to a service center, but avoid long trips and do not rely on inductive charging until the fault is repaired. If the vehicle fails to start or shows a high-voltage warning, do not drive and have it towed.

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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