BMW DTC U1135 – Lost Communication With Status Water Valve
DTC U1135 meaning on BMW
The DTC U1135 code on a BMW indicates a communication error with the status water valve. This means that the vehicle’s control module is unable to establish communication with the status water valve, which is responsible for regulating the flow of coolant in the engine cooling system.
BMW DTC U1135 symptoms
Symptoms of the DTC U1135 code on a BMW may include:
- Engine overheating
- Loss of engine power
- Check Engine Light (CEL) illuminated on the dashboard
- Issues with the heating or cooling system
BMW DTC U1135 causes
The DTC U1135 code on a BMW can be caused by various factors, including:
- Faulty status water valve
- Wiring or connection issues between the control module and the status water valve
- Defective control module
- Low coolant level
BMW DTC U1135 seriousness
The DTC U1135 code should be addressed promptly as it can lead to engine overheating and potential damage if left unresolved. Ignoring this code may result in costly repairs and possible engine failure.
How to diagnose DTC U1135 on BMW
To diagnose the DTC U1135 code on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the vehicle’s control module
- Inspect the status water valve for any visible damage or signs of malfunction
- Check the wiring and connections between the control module and the status water valve for any issues
- Test the control module for proper functionality
- Verify the coolant level in the system
How to fix DTC U1135 on BMW
To fix the DTC U1135 code on a BMW, the following steps may be taken:
- Replace the faulty status water valve if necessary
- Repair any damaged wiring or connections between the control module and the status water valve
- Replace the control module if it is found to be defective
- Ensure the coolant level is topped up to the recommended level
How to erase DTC U1135 on BMW
To erase the DTC U1135 code on a BMW, a diagnostic scanner can be used to clear the fault codes stored in the vehicle’s control module. Once the issue has been addressed and fixed, the code can be cleared to reset the Check Engine Light and ensure that the repair was successful.
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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