Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is having trouble controlling the second coolant pump. It's like when a remote control can't make a toy car move because the batteries are low.
The engine control module (ECM) has detected a low voltage or resistance issue in the control circuit for the secondary coolant pump.
P261C is triggered when the ECM detects that the voltage in the control circuit for Coolant Pump B is lower than expected. This can indicate a problem with the wiring, the pump itself, or the ECM's ability to control the pump.
• Check Engine Light is on
• Engine overheating
• Reduced engine performance
• Faulty Coolant Pump B
• Wiring issues in the control circuit
• Faulty ECM (Engine Control Module)
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code.
• Inspect wiring and connections for damage or corrosion.
• Test the coolant pump for proper operation.
• Repair or replace damaged wiring.
• Replace Coolant Pump B if faulty.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $600
Moderate
• Toyota Camry
• Ford F-150
• Chevrolet Silverado
• Regularly check and maintain coolant levels.
• Inspect electrical connections periodically.
• Service the cooling system as recommended by the manufacturer.
Sensor Issue
• Avoid driving the vehicle until the issue is resolved to prevent engine damage.
• Consult a professional mechanic for accurate diagnosis and repair.
Check with the vehicle manufacturer for warranty coverage on the cooling system components.
This code has been reported in vehicles with aging cooling systems or those with electrical issues.
High – Immediate attention is required to prevent engine overheating.
Driving with an overheating engine can cause severe damage and may not be covered under warranty.
• Engine at operating temperature
• Ignition on, engine off
Coolant Pump B is typically located near the front of the engine, connected to the cooling system.
Q: Can I drive my car with a P261C code?
A: It's not recommended, as it can lead to engine overheating and severe damage.
Q: How do I reset the P261C code?
A: After repairs, use an OBD-II scanner to clear the code, but ensure the issue is fixed first.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.