P2D49Hybrid/EV Battery Pack E 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
- P2D49 says that section E, the fifth separately monitored part of a traction battery, is hotter than permitted. One trap with every pack over-temperature code is heat produced after the car has been switched off. Subaru's 2014–16 Crosstrek Hybrid illustrates it: bulletin 11-185-18 explains that the battery warms itself slightly by self-discharge after shutdown, the original controller logic allowed too little for this, and motor assist, regeneration and auto start-stop then stopped working under P0A7E; reprogramming solved it without a new battery. No manufacturer documents P2D49 publicly. CARB calls for monitored battery temperature inputs and cooling. A code that only appears after parking with no other finding hints at software.
- What you may notice
- Hybrid warning light, sometimes only after the car has stood
- Motor assist and regeneration unavailable
- Auto start-stop no longer works
- Likely causes
- PossibleBattery controller logic or threshold too strict for normal post-shutdown warming (software update)
- PossibleReduced cooling of section E (coolant flow, fan, duct)
- PossibleParking in strong sun or heat after hard use
- 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.