P261F Coolant pump A control circuit stuck on

P261F coolant pump A stuck on

P261F in short

P261F means the computer sees coolant pump A stuck on or not responding to its control. GM has a bulletin for it on the 2021-2022 Blazer, XT5, XT6 and Acadia. Hyundai Sonata Hybrid owners report the electric water pump was the fault, with warning lights and limited power.

An electric coolant pump runs when the computer switches it on and off. P261F is set when the pump circuit is stuck on and does not follow the computer.

GM bulletin 22-NA-077 covers this code on the 2021-2022 Chevrolet Blazer, Cadillac XT5 and XT6 and GMC Acadia, with the check engine light coming on after two faults. The summary does not say what the repair is.

On a 2016 Sonata Hybrid, a repair shop read the code as Coolant Pump A Control Circuit Stuck On and the dealer diagnosed the electric water pump. Another Sonata Hybrid owner had four ignition coils replaced for P261F and P0A0F and the fault came back.

Most likely causes

  1. Electric coolant pump failing

    Supported by vehicle data
    Why it ranks here
    A Sonata Hybrid dealer diagnosed the electric water pump for P261F, and a second owner reports the code with an overheat warning. GM has a repair bulletin but its summary does not name the part.
    What would change this
    Rises if the pump does not follow commands or runs when it should be off. Falls if the pump works normally on a bidirectional scan tool.

What to test first

Start at step 1. Each result tells you what it means and where to go next.

  1. Have a shop read the codes and command the coolant pump on and off with a scan tool, then ask whether a bulletin applies to your VIN.

    Best left to a shopTool: bidirectional scan tool

    Warning:The cooling system is hot and pressurised and hybrid models have high-voltage cables. Leave testing to a shop.

    • IfThe pump does not respond or is stuck running

      It meansThe pump is suspect.

      Points to: Electric coolant pump failing

    • IfThe pump responds normally

      It meansAsk for the manufacturer's bulletin and check other codes such as P2600.

Symptoms

  • Check engine light or hybrid system warning
  • Car slows and drives on electric power only
  • Overheat warning or message to pull over Gets more serious: stop and have it checked.

How to fix

  1. With the engine cold, check the coolant reservoir level and ask a dealer whether a bulletin covers your VIN.

On your vehicle

Hyundai

  • 2016 · Sonata

    Supported by vehicle data

    Four 2016 Sonata, Sonata Hybrid and Plug-in Hybrid owners report P261F, some with an electric water pump diagnosis and hybrid warnings.

Chevrolet

  • 22-NA-077 (chevrolet)Status unverified

    DTC P261F Coolant Pump A Stuck On

    2021–2022blazer · NHTSA 10210284

    Repair information for P261F setting the check engine lamp after two faults.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Cadillac

  • 22-NA-077 (cadillac)Status unverified

    DTC P261F Coolant Pump A Stuck On

    2021–2022xt5, xt6 · NHTSA 10210284

    Repair information for P261F setting the check engine lamp after two faults.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

GMC

  • 22-NA-077 (gmc)Status unverified

    DTC P261F Coolant Pump A Stuck On

    2021–2022acadia · NHTSA 10210284

    Repair information for P261F setting the check engine lamp after two faults.

    We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

No curated relationships for P261F yet.

All Engine cooling (thermostat) codes

P261F questions

Can I keep driving with P261F?

Have it checked soon. If an overheat warning or pull-over message appears, stop and let the engine cool.

Sources and review

  1. NHTSA complaint ODI 11459035 — NHTSA Office of Defects Investigation (owner complaint)
  2. NHTSA complaint ODI 11520894 — NHTSA Office of Defects Investigation (owner complaint)
  3. GM bulletin 22-NA-077, DTC P261F Coolant Pump A Stuck On (NHTSA 10210284) — General Motors
  4. NHTSA complaint ODI 11061129 — NHTSA Office of Defects Investigation (owner complaint)
Last reviewed
Written by
Saurabh K.
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