Powertrain
Definition only
Lights the check engine lamp
P2B64: Coolant Pump B Control Module Overtemperature
Standardized SAE J2012 code · P2Bxx codes
What does P2B64 mean?
Coolant pump B reports a control module overtemperature condition. Coolant circulation through the affected loop cannot be commanded reliably.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Ambient or under-bonnet temperature too high
- Medium Module cooling path blocked
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2B64 on the same make and model first.
P2B64 in the community
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