P26CB code meaning
Engine Coolant Pump Performance/Stuck Off
Powertrain system Generic code P26xx codes Check engine light
What P26CB means
P26CB means the engine coolant pump does not deliver the expected work, typically because the impeller is blocked or turns too slowly. Ford's OBD summaries for hybrids let the pump's own electronics judge this from current and speed: too much current at too low a speed through four restart attempts is reported over LIN, and the PCM records P26CB after five seconds. Genesis campaign 916G (GV70 3.5 T, 2024–2025) replaces the electric pump of the water-cooled charge air cooler because a stuck impeller set P26CB. Jaguar Land Rover bulletin JLRTB02030NAS1 links it on Ingenium 2.0 L gasoline engines to a switchable mechanical pump whose diverter shroud no longer moves, making the fans run at full speed. Toyota's A25A engines log it as speed stuck. Overheating protection may cut power.
P26CB at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.3 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P26CB
- Check engine lamp on
- Cooling fans running constantly at high speed
- Rising engine temperature or reduced power
Common causes of P26CB
- Most likelySeized or obstructed impeller in the electric pump
- PossibleDiverter shroud of a switchable mechanical pump not moving
- PossibleWorn pump motor or bearing drawing excessive current
- Less likelyEngine module logic needing a software update
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Engine coolant pumpPump motor
What each part of P26CB means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 6 | Area: computer (engine control module) and output circuits. |
| CB | The exact fault in that area. |
What to do next
- Note P26CB and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P26CB
What does P26CB mean?
P26CB means "Engine Coolant Pump Performance/Stuck Off". P26CB means the engine coolant pump does not deliver the expected work, typically because the impeller is blocked or turns too slowly. It is a generic code, so it means the same on every make.
Is it safe to drive with P26CB?
Drive gently and only to a workshop. With P26CB the car can go into limp mode (reduced power) to protect itself.
Will P26CB fail an emissions test?
Yes, it can. P26CB is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P26CB to fix?
Difficulty: medium. A typical repair takes 0.3 to 4 hours of work. This is a job for a workshop.
Will P26CB clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.