What Does P261A Mean?
The PCM has detected an open circuit or lack of continuity in the secondary electric coolant pump control circuit. This prevents the PCM from activating the auxiliary coolant pump when needed.
Common Causes
35%
Open circuit or broken wire in coolant pump B control harness
30%
Failed electric coolant pump B motor or internal circuit
20%
Blown fuse or failed relay for coolant pump B circuit
15%
Corroded or damaged connector at coolant pump or PCM
Diagnostic Steps
1
Step 1: Check fuse and relay for coolant pump B circuit, replace if faulty
2
Step 2: Inspect wiring harness and connectors at coolant pump for damage, corrosion, or loose connections
3
Step 3: Check for continuity in control circuit from PCM to coolant pump with harness disconnected
4
Step 4: Measure resistance of coolant pump motor windings to verify pump is not open internally
5
Step 5: Command coolant pump on with scan tool and verify voltage at pump connector
Estimated Repair Cost
$200 - $800
Parts + labor, varies by vehicle and location
The PCM has detected an open circuit or lack of continuity in the secondary electric coolant pump control circuit. This prevents the PCM from activating the auxiliary coolant pump when needed.
The most common cause of P261A (Coolant Pump "B" Control Circuit/Open) is: Open circuit or broken wire in coolant pump B control harness
Typical repair costs for P261A range from $200 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Engine may overheat under certain conditions, particularly at idle or low speeds. Could lead to engine damage if ignored.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P261A to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Powertrain
System
Engine Cooling System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
