P2E75Hybrid/EV Battery Pack Coolant Temperature Sensor D Circuit Range/Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2E75 means battery coolant sensor D gives a reading that is electrically fine yet does not match the other temperatures in the loop. No manufacturer documents P2E75 publicly. GM's sensor B (outlet) shows how such a check works: with the pump above 20 % the outlet value is compared with inlet and average cell temperature. The 2011 Volt fails it at more than 10 °C, 80 of 100 samples at 100 ms; the 2016 ELR allows 20 °C, 32 of 40 samples at 250 ms; both two-trip Type B. Software can be the culprit: Volvo had P0CD6 set wrongly on 2016–17 XC90 T8 (TJ 32193), Audi had P0C4300 with emissions lamp on the 2020 Q5 TFSI e, fixed by thermal module software. CARB requires rationality checks where feasible.
- What you may notice
- Warning light, frequently with no other symptom
- Less effective battery cooling or heating
- Likely causes
- LikelySensor D drifting or responding slowly
- PossiblePlausibility logic in controller software too strict (update available)
- PossibleAir pocket or poor coolant flow around the sensor
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €0 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.