Powertrain, generic (extended)

P2D48 Hybrid/EV Battery Pack D Over Temperature

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2D48 is the over-temperature code for the fourth section, D, of a sectioned high-voltage battery. Before treating it as real heat, a technician should ask whether the temperature value itself can be trusted. Porsche's 2025 911 GTS T-Hybrid shows why: P0A7E00 was stored together with a thermal run-through code and a red fire warning that blocked starting, yet no hot surface or smell was found; a software condition interrupted communication inside the battery, so its sensors sent implausible values. No manufacturer documents P2D48 itself. CARB requires battery temperature sensors to be monitored as inputs, and genuine sensor faults normally carry their own codes. Real overheating of section D limits power and charging.

Likely causes

Implausible temperature data from the battery electronics (internal communication or software fault)
Insufficient cooling of section D (coolant flow, pump, chiller, air path)
Genuine cell overheating in section D due to an internal cell defect

Symptoms

  • Hybrid system or battery warning, possibly a fire hazard message
  • Vehicle may refuse to start or enter drive-ready mode
  • Reduced electric power and charging

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–4,000
Time1–10 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

hv battery pack dbattery thermal managementbattery energy control module

Related codes

P2D47P2D49P0A7EP0EDFP0A9C

References: law.cornell.edu, static.nhtsa.gov.