P2E47Hybrid/EV Electronics Coolant Pump B Underspeed
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2E47 is set when electronics coolant pump B keeps turning but clearly slower than requested. GM's 2018 hybrid tables describe the check for pump A (P19FC): the filtered difference between commanded and reported speed must stay within a calibrated band once the pump has run for 5 s at 11 to 90 % duty, otherwise a Type B fault results. Ford's 2024 summary keeps underspeed (B2) as a fault type of its own, and a Toyota patent for cooling a vehicle drive unit (US20130030643) uses pump speed together with flow and coolant temperature to locate the faulty part. No manufacturer publicly documents P2E47. Unlike a stall (P2E49) the rotor still moves, so bearing friction, impeller deposits, a partial blockage, thick cold coolant or a weak supply are more plausible than a failed motor. Pump A: P2C66.
- What you may notice
- MIL and hybrid system warning
- Electronics temperatures rise during long drives or fast charging
- Occasional power limitation
- Likely causes
- LikelyStiff bearing or worn pump B
- PossibleDeposits or debris slowing the impeller
- PossibleVoltage drop on pump supply or ground under load
- RareIncorrect or aged coolant, too viscous when cold
- 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: €150 – €1,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.