P2D48Hybrid/EV Battery Pack D Over Temperature
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- 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
- Likely causes
- PossibleImplausible temperature data from the battery electronics (internal communication or software fault)
- PossibleInsufficient cooling of section D (coolant flow, pump, chiller, air path)
- RareGenuine cell overheating in section D due to an internal cell defect
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.