BMW DTC U3506 – Control Module Input Power ‘B’ Circuit High
DTC U3506 meaning on BMW
The Diagnostic Trouble Code (DTC) U3506 for BMW refers to the Control Module Input Power ‘B’ Circuit High. This code indicates that the power input signal to a specific control module in the vehicle is reading higher than the expected threshold.
BMW DTC U3506 symptoms
Symptoms of the BMW DTC U3506 may include:
- Check Engine Light (MIL) illuminated on the dashboard
- Reduced engine performance
- Vehicle may go into limp mode
BMW DTC U3506 causes
Common causes of the BMW DTC U3506 include:
- Short circuit in the power input wiring
- Faulty control module
- Corrosion or poor connections in the wiring harness
BMW DTC U3506 seriousness
The seriousness of the BMW DTC U3506 code lies in the potential impact on the vehicle’s performance and drivability. Ignoring this code can lead to further electrical issues and may result in the vehicle not functioning properly.
How to diagnose DTC U3506 on BMW
To diagnose the DTC U3506 on a BMW, follow these steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the power input wiring for any signs of damage or short circuits
- Check the connections to the control module for corrosion or poor contact
- If necessary, test the control module for proper functionality
How to fix DTC U3506 on BMW
To fix the DTC U3506 on a BMW, consider the following:
- Repair any damaged wiring or replace the wiring harness if needed
- Clean or replace any corroded connectors in the power input circuit
- If the control module is faulty, replace it with a new one
How to erase DTC U3506 on BMW
To erase the DTC U3506 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the vehicle’s system. Once the issue has been addressed and fixed, clearing the codes will reset the Check Engine Light and ensure that the system recognizes the problem has been resolved.
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
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.