P2BA0
Coolant Pump C Underspeed
Coolant pump C reports a underspeed condition. Coolant circulation through the affected loop cannot be commanded reliably.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Mechanical load increased (binding)Common
- Supply voltage low under loadPossible
Parts involved
- Coolant Pump C
- Wiring Harness
- ECM
P2BA0 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.