P261B code meaning
Coolant Pump B Control Circuit Performance/Stuck Off
Powertrain system Generic code P26xx codes Check engine light
What P261B means
Unlike the wiring codes around it, P261B judges whether coolant pump B actually delivers when commanded. The verdict comes from pump feedback or from its effect on coolant temperatures, so the circuit can test fine while the pump does nothing. Ford's 2020-2023 and 2024 gasoline summaries list it for the component-cooling pump of the high-temperature loop, next to the circuit codes of that pump. Audi's 2.0 TFSI bulletin 2043142 (2012-2016) reports it as range/performance and traces it to a sporadically failing after-run pump that is replaced. GM's hybrid tables from 2014 group P261B with P261C in a no-flow fault bundle of the switchable water pump. Seized impellers, air in the loop or a weak pump are typical; P261E is the opposite stuck-on case.
P261B at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor1 to 3 hours
- Clears after repairAfter a drive cycle
Symptoms of P261B
- Malfunction indicator lamp on
- Engine or turbo runs hotter after shutdown, possible boiling noises
- Heater or component cooling weak in certain conditions
Common causes of P261B
- Most likelyAuxiliary pump motor or electronics failing intermittently
- PossibleAir pocket after coolant service, pump runs dry
- PossibleImpeller blocked by debris or deposits
- Less likelyLow coolant level
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Coolant pump bPump motor
What each part of P261B 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. |
| 1B | The exact fault in that area. |
What to do next
- Note P261B 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 P261B
What does P261B mean?
P261B means "Coolant Pump B Control Circuit Performance/Stuck Off". Unlike the wiring codes around it, P261B judges whether coolant pump B actually delivers when commanded. It is a generic code, so it means the same on every make.
Is it safe to drive with P261B?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P261B fail an emissions test?
Yes, it can. P261B 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 P261B to fix?
Difficulty: medium. A typical repair takes 1 to 3 hours of work. This is a job for a workshop.
Will P261B clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.