P2BD4Motor Electronics Coolant Pump C Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Hybrid and electric drives cool the inverter, DC/DC converter and motor with one or more electric pumps; J2012 labels them A, B and C. P2BD4 means the controlling module has found an open circuit or an unclassified fault on the control line of pump C. No manufacturer documents P2BD4, or a third pump of this kind, publicly. Comparable checks exist for pump A: Ford's 2019 hybrid summary sets P0A05 when no reply arrives from the pump for more than 9.25 s with 6–19 V on the system, and GM's 2016 tables for the Cadillac ELR flag P0CE9 for an open or shorted pump control line in 16 of 20 samples at 250 ms, Type B. CARB requires the electronic parts of inverter cooling to be monitored. Low and high faults of pump C are P2BD5 and P2BD6. Overheating electronics lead to reduced drive power.
- What you may notice
- Hybrid or drive system warning, often with the check engine light
- Reduced drive power when the electronics heat up
- Pump C silent during an actuator test
- Likely causes
- LikelyUnplugged, loose or corroded connector at pump C
- PossibleBroken control or signal wire between module and pump
- PossibleFailed electronics inside the pump
- RareFaulty output or input stage 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: €60 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.