P261A: Coolant Pump B Control Circuit / Open
Standardized SAE J2012 code · P26xx — Computer and output circuits
What does P261A mean?
The controller cannot drive the second electric coolant pump (B). Often used for aftertreatment, turbo cool-down, or hybrid battery loops — fault stops circulation in that loop.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Open pump motor winding
- Medium Broken control wire to the pump
Likelihood is a general estimate across vehicles; your make and model may differ.
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P261A in the community
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