P26A4: The engine coolant bypass valve A position sensor has an electrical fault
The engine coolant bypass valve A position sensor has an electrical fault. It may be the part itself, its connector or the wiring.
| Code | P26A4 |
|---|---|
| System | Engine and transmission |
| Group | P26xx, Auxiliary outputs and cooling |
| Type | Generic: it means the same on every make |
How to read and clear P26A4 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 P26A4 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
- P26A0 The exhaust after-treatment glow plug gives readings outside the normal range
- P26A1 The exhaust after-treatment glow plug gives a lower signal than normal
- P26A2 The exhaust after-treatment glow plug gives a higher signal than normal
- P26A3 The engine coolant bypass valve A gives readings outside the normal range
- P26A5 The engine coolant bypass valve A position sensor gives readings outside the
- P26A6 The engine coolant bypass valve A position sensor gives a lower signal than
- P26A7 The engine coolant bypass valve A position sensor gives a higher signal than
- P26A8 The engine coolant bypass valve A position sensor fails now and then
What does code P26A4 mean?
The engine coolant bypass valve A position sensor has an electrical fault. It may be the part itself, its connector or the wiring.
How do you clear P26A4?
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, P26A4 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.
