Coolant Pump Control Circuit Range/Performance
The P2601 code means the vehicle's onboard diagnostic system has detected: Coolant Pump Control Circuit Range/Performance. This is a critical severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $300 - $900 (parts and labor)
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What Are the Symptoms of P2601?
- Coolant pump running but not at correct speed
- Engine running warmer than normal
- Reduced heater output
- Check engine light on
What Causes P2601? (Most Likely First)
- Coolant pump motor wearing out Very High
- Voltage drop in pump power supply circuit High
- Debris restricting pump impeller Moderate
- ECM PWM signal out of specification Low
Can I Still Drive with P2601?
Short distances only. P2601 is rated critical severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
What does range/performance mean for the coolant pump?
The pump is operating but not at the speed or flow rate the ECM expects. It may be running too slow due to wear, debris, or electrical supply issues.
Can scale buildup affect the coolant pump?
Yes. Mineral deposits and corrosion can restrict the impeller, reducing pump efficiency. Regular coolant flushes help prevent this.
How is the coolant pump speed controlled?
The ECM uses a PWM (pulse width modulation) signal to vary pump speed based on engine temperature, vehicle speed, and other factors.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P2601?
-
Measure coolant pump current draw at various speeds
-
Check power supply voltage at pump connector under load
-
Inspect pump for debris or scale buildup
-
Monitor ECM PWM command vs actual pump speed
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
Which Vehicles Commonly Get P2601?
- 2012-2020 BMW 535i
- 2010-2018 Toyota Prius V
- 2014-2020 Ford C-Max
- 2013-2020 Chevrolet Bolt
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