Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that there is a problem with the part of the car that helps keep the battery cool. It's like when a fan in your room stops working, and the room gets too hot.
The P1B36 code indicates an issue with the electrical circuit that controls the valve responsible for directing coolant to the heat exchanger in a hybrid or electric vehicle's battery cooling system.
The P1B36 code is set when the powertrain control module (PCM) detects a malfunction in the circuit that controls the battery coolant valve to the heat exchanger. This valve is crucial for regulating the temperature of the hybrid or electric vehicle's battery by allowing coolant to flow through the heat exchanger.
• Illuminated check engine light
• Reduced battery performance
• Overheating of the battery pack
• Faulty battery coolant valve
• Damaged wiring or connectors in the circuit
• Defective powertrain control module (PCM)
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the battery coolant valve for proper operation.
• Replace the faulty battery coolant valve.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$200 - $600
Moderate
• Chevrolet Volt
• Nissan Leaf
• Toyota Prius
• Regular maintenance of the cooling system
• Periodic inspection of wiring and connectors
• Ensuring proper coolant levels
Circuit Issue
• Do not ignore the check engine light.
• Have the vehicle inspected by a professional if you notice reduced battery performance.
Check with the vehicle manufacturer for specific warranty coverage related to hybrid/EV components.
This code has become more common with the increase in hybrid and electric vehicles, highlighting the importance of battery cooling systems.
High – Addressing this issue promptly is important to prevent battery damage.
Ignoring this code may lead to battery overheating, which can be a safety hazard.
• Vehicle must be at operating temperature.
• Ensure the cooling system is filled with the correct level of coolant.
The battery coolant valve is typically located near the battery pack, often in the engine bay or under the vehicle.
Q: Can I drive with a P1B36 code?
A: It's not recommended to drive for long periods with this code, as it may lead to battery overheating.
Q: How do I reset the P1B36 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is resolved, the code should not return.
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