P2E45Hybrid/EV Electronics Coolant Pump B Enable Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Some designs switch electronics coolant pump B on through a separate enable line or a relay, independent of the speed command; P2E45 reports a fault in that path. GM's 2018 hybrid tables show the scheme for pump A: with the enable output active, more than 0.6 A on the line counts as a short to ground (P1F44); with it inactive, more than 35 µA or a line voltage under 4.5 V counts as a short to voltage (P1F45), each after 16 of 20 samples at 250 ms, Type B. The 2016 tables list the same pair. Mitsubishi's 2022 Outlander PHEV powers its electric water pump through a relay energised by the PHEV-ECU and names that relay among the causes of its pump speed code P10D9. No manufacturer documents P2E45 itself. Without enable the pump stays dead although the command signal is fine. Pump A's code is P0CED.
- What you may notice
- Pump B never starts although commanded
- MIL and hybrid or charging warning
- Power or charging limited as electronics heat up
- Likely causes
- LikelyEnable wire open or shorted between module and pump
- PossiblePump relay or its fuse failed, where the design uses one
- RareFaulty enable output in the controlling module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €40 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.