P26D5: The engine coolant pump power supply voltage is above normal
The engine coolant pump power supply voltage is above normal. It usually comes from the battery, the alternator or a poor connection.
| Code | P26D5 |
|---|---|
| System | Engine and transmission |
| Group | P26xx, Auxiliary outputs and cooling |
| Type | Generic: it means the same on every make |
How to read and clear P26D5 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 P26D5 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
- P26D1 The engine coolant pump control unit system voltage is above normal
- P26D2 The engine coolant pump control unit is getting too hot
- P26D3 The engine coolant pump power supply voltage has an electrical fault
- P26D4 The engine coolant pump power supply voltage is below normal
- P26D6 The engine coolant pump clutch control has a broken or disconnected wire
- P26D7 The engine coolant pump clutch has got stuck
- P26D8 The engine coolant pump clutch has got stuck
- P26D9 The engine coolant pump clutch control gives a lower signal than normal
What does code P26D5 mean?
The engine coolant pump power supply voltage is above normal. It usually comes from the battery, the alternator or a poor connection.
How do you clear P26D5?
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, P26D5 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.
