BMW DTC P1B35 – Hybrid/EV Battery Coolant Valve to Heat Exchanger Circuit Low
DTC P1B35 meaning on BMW
The Diagnostic Trouble Code (DTC) P1B35 for BMW refers to an issue with the Hybrid/EV Battery Coolant Valve to Heat Exchanger Circuit being detected as low. This code indicates a problem with the electrical circuit related to the coolant valve that controls the flow of coolant to the heat exchanger in the hybrid or electric vehicle system.
BMW DTC P1B35 symptoms
Symptoms of the BMW DTC P1B35 code may include:
- Check Engine Light (MIL) illuminated on the dashboard
- Reduced hybrid or electric vehicle performance
- Engine overheating or cooling system issues
BMW DTC P1B35 causes
Common causes of the BMW DTC P1B35 code include:
- Faulty Hybrid/EV Battery Coolant Valve
- Issues with the electrical connections or wiring related to the coolant valve
- Problems with the heat exchanger itself
BMW DTC P1B35 seriousness
The seriousness of the BMW DTC P1B35 code lies in the potential impact on the hybrid or electric vehicle system’s performance and efficiency. Ignoring this code can lead to overheating issues, reduced battery life, and overall drivability problems.
How to diagnose DTC P1B35 on BMW
To diagnose the DTC P1B35 on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the specific fault code
- Inspect the Hybrid/EV Battery Coolant Valve and its electrical connections for any visible damage or corrosion
- Check the heat exchanger for any signs of leaks or blockages
- Perform electrical tests to ensure proper voltage and continuity in the circuit
How to fix DTC P1B35 on BMW
Fixing the DTC P1B35 on a BMW typically involves the following steps:
- Replace the faulty Hybrid/EV Battery Coolant Valve if necessary
- Repair or replace any damaged wiring or connectors in the circuit
- Address any issues with the heat exchanger, such as leaks or blockages
- Clear the fault code and reset the system to see if the issue has been resolved
How to erase DTC P1B35 on BMW
To erase the DTC P1B35 code on a BMW, you can use a diagnostic scanner to clear the code from the vehicle’s computer system. After fixing the underlying issue causing the fault code, clearing it will reset the Check Engine Light and allow you to monitor if the problem reoccurs.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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