Coolant Pump Control Circuit Range/Performance
The P2601 code indicates that the Engine Control Module (ECM) has detected a malfunction in the coolant pump control circuit. This typically means the pump is not operating within its expected parameters, such as speed or current draw, which can lead to inadequate engine cooling. The issue may be electrical (wiring, connector, or pump motor) or mechanical (pump seized or failing).
01. Most Common Causes
- Faulty coolant pump motor
- Open or shorted wiring in the pump control circuit
- Poor electrical connection at the pump connector
- Failed ECM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine overheating or temperature gauge reading high
- Coolant leaks near the pump
- Reduced heater performance
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and record freeze frame data.
Step 2: Visually inspect the coolant pump and its wiring for damage, corrosion, or loose connections.
Step 3: Test the pump's electrical connector for voltage and ground signals using a multimeter.
Step 4: Check pump resistance and compare to specifications; replace if out of range.
Step 5: If wiring and pump are okay, test the ECM output signal (may require professional scan tool).
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe. The coolant pump may not be working properly, risking engine overheating and severe damage. Have the vehicle towed to a repair shop.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and repair, but can be higher if the pump or ECM needs replacement.