What Does P2601 Mean?
The powertrain control module has detected an abnormal performance issue with the electric coolant pump control circuit. The pump is operating outside expected parameters, indicating erratic operation or feedback signal issues.
Common Causes
35%
Faulty electric coolant pump with worn brushes or internal failure
25%
Corroded or damaged wiring harness connections to coolant pump
20%
PCM/ECM driver circuit malfunction or software issue
12%
Low system voltage or faulty power supply to pump circuit
8%
Pump control relay failure or poor ground connection
Diagnostic Steps
1
Step 1: Monitor coolant pump operation with scan tool while commanding pump on/off, observe actual vs. commanded speed
2
Step 2: Check voltage and ground at coolant pump connector with pump commanded on (should see battery voltage)
3
Step 3: Inspect wiring harness for damage, corrosion, or loose connections between PCM and pump
4
Step 4: Test coolant pump operation by applying direct battery voltage to verify pump motor function
5
Step 5: Check PCM software version and update if TSBs exist; test PCM driver circuit with oscilloscope
Estimated Repair Cost
$200 - $800
Parts + labor, varies by vehicle and location
The powertrain control module has detected an abnormal performance issue with the electric coolant pump control circuit. The pump is operating outside expected parameters, indicating erratic operation or feedback signal issues.
The most common cause of P2601 (Coolant Pump "A" Control Circuit Range/Performance) is: Faulty electric coolant pump with worn brushes or internal failure
Typical repair costs for P2601 range from $200 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Reduced cooling efficiency may lead to engine overheating under load or extended driving. Monitor coolant temperature closely and avoid prolonged operation.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P2601 to identify the root cause.
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Quick Info
Category
Powertrain
System
Engine Cooling System
Difficulty
Type
Generic (SAE)
Recommended Tools
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