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DTC codes / P0Exx · Hybrid propulsion / P0E83

P0E83Battery Charger B Temperature Sensor Circuit High

P0E83 indicates that the powertrain control module has detected an abnormally high voltage signal from the battery charger B temperature sensor circuit. This sensor monitors the temperature of the auxiliary battery charger, and a high signal usually means the circuit is open, shorted to voltage, or the sensor's internal resistance has shifted out of range.

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

Symptoms you may notice

  • Illumination of the check engine light or service vehicle soon message
  • Often no symptoms besides the warning light
  • Reduced or disabled high-voltage battery charging in plug-in hybrid and electric vehicles
  • A charging system warning message or refusal to accept a charge
  • Possible derating of electrical accessory operation or reduced power mode
  • In rare cases, a burning smell or hot component near the charger if the sensor is misreporting a real overheat

Common causes, most likely first

  1. Open circuit in the sensor signal wire or a disconnected connector at the charger
  2. Corroded, loose, or damaged terminals at the temperature sensor or charger harness
  3. Internal failure of the battery charger B temperature sensor causing high resistance
  4. Short to voltage on the signal circuit from chafed wiring or water intrusion
  5. Failed battery charger assembly with an integrated sensor fault
  6. Powertrain control module software calibration issue or internal driver fault
  7. Aftermarket accessories or improper prior repairs disturbing the charger harness

How to diagnose and fix it

  1. Scan all modules and record freeze-frame data for P0E83 before clearing any codes
  2. Visually inspect the charger B temperature sensor connector and harness for damage, corrosion, or water intrusion
  3. Measure sensor resistance with a multimeter and compare to the manufacturer's temperature-resistance chart
  4. Back-probe the signal circuit at the sensor and at the control module to check for an open or short to voltage
  5. Check for a stable 5-volt reference and a good ground at the sensor connector with the key on
  6. If wiring and sensor test good, substitute a known-good sensor or simulate the signal to verify the module reading
  7. Repair or replace the faulty sensor, harness section, or charger assembly and clear codes to confirm the repair

Charger temperature sensor faults that fool technicians

  • A high signal code often appears after a low-voltage battery replacement or jump-start because the charger module loses its learned sensor offset and needs a relearn procedure.
  • Water intrusion into the charger connector is a common cause on vehicles that are washed frequently or driven in heavy rain, and the corrosion can mimic a failed sensor.
  • The sensor is frequently integrated into the charger assembly, so a failed sensor may require replacing the entire charger rather than a separate inexpensive part.
  • Technicians sometimes replace the charger when the real fault is a chafed signal wire in the harness near a sharp body seam or heat source.
  • This code can set intermittently from a poor ground at the charger mounting bolt, which is easy to overlook during circuit testing.

Can I keep driving with P0E83?

You can usually drive the vehicle short distances to a repair shop, but avoid long trips and heavy electrical loads until the fault is repaired. If the vehicle refuses to charge or shows a high-voltage warning, stop driving and have it towed to prevent damage to the charging system.

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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