P0B39 Code - Motor Electronics Coolant Pump 'B' Control Circuit Low
Quick Answer
The diagnostic trouble code P0B39 indicates a problem with the Motor Electronics Coolant Pump 'B' Control Circuit being detected as low. Common causes include Faulty coolant pump 'B', Wiring or connection issues in the control circuit, Malfunctioning coolant pump control module. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0B39 indicates Motor Electronics Coolant Pump 'B' Control Circuit Low.
- Common causes
- Common causes include Faulty coolant pump 'B', Wiring or connection issues in the control circuit, Malfunctioning coolant pump control module.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P0B39 Description
The diagnostic trouble code P0B39 indicates a problem with the Motor Electronics Coolant Pump 'B' Control Circuit being detected as low. In vehicles equipped with hybrid or electric powertrains, a coolant pump is used to circulate coolant through the motor electronics to maintain optimal operating temperatures. The 'B' designation in the code specifies a particular circuit associated with this pump.
Common Causes of P0B39
- Faulty coolant pump 'B'
- Wiring or connection issues in the control circuit
- Malfunctioning coolant pump control module
- Electrical faults in the system
- Corrosion or damage to components in the circuit
Symptoms of P0B39
- Illuminated check engine light on the dashboard
- Overheating of the motor electronics
- Reduced power output or efficiency
- Unusual noises coming from the coolant pump
- Poor overall vehicle performance
How to Fix P0B39
- Begin by conducting a thorough inspection of the coolant pump 'B' and its control circuit to identify any visible damage or faults.
- Test the coolant pump, control module, and associated wiring using a multimeter to check for proper voltage and continuity.
- Replace any damaged components, such as the coolant pump, control module, or wiring harness, as needed.
- Clear the diagnostic trouble codes from the vehicle's memory using a scan tool and test drive the vehicle to ensure the issue has been resolved.
- If the problem persists, consult the vehicle's service manual for specific diagnostic procedures or seek assistance from a professional technician.
Cost to Fix P0B39
The cost of repairing a P0B39 code can vary depending on the specific cause of the issue and the extent of the damage. In general, replacing a faulty coolant pump 'B' or control module can range from $200 to $500, including parts and labor. Additional costs for diagnostic testing and potential wiring repairs may also apply.
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