P2B9E: The coolant pump A control unit is getting too hot
The coolant pump A control unit is getting too hot. It may be poor cooling, very demanding use or the part itself.
| Code | P2B9E |
|---|---|
| System | Engine and transmission |
| Group | P2Bxx, Engine and emissions |
| Type | Generic: it means the same on every make |
How to read and clear P2B9E with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see P2B9E with its description and whether it’s confirmed, pending or permanent.
If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- P2B97 The exhaust pressure control valve position A needs its learning procedure
- P2B98 The exhaust pressure control valve power supply A gives a lower signal than
- P2B9A The AdBlue quality sensor fails now and then
- P2B9D The coolant pump A power supply voltage has an electrical fault
- P2B9F The coolant pump B is turning slower than it should
- P2BA0 The coolant pump C is turning slower than it should
- P2BA1 The coolant pump D is turning slower than it should
- P2BA7 NOx emissions have exceeded the limit, and the reductant fluid tank is empty
- P2BAC NOx exceedance: EGR deactivated
What does code P2B9E mean?
The coolant pump A control unit is getting too hot. It may be poor cooling, very demanding use or the part itself.
How do you clear P2B9E?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, P2B9E comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
