P1777 – BMW DTC

BMW DTC P1777 – CAN Wheel Speed Front Wheel Right No Signal

DTC P1777 meaning on BMW

The Diagnostic Trouble Code (DTC) P1777 for BMW indicates that there is no signal detected from the front right wheel speed sensor on the Controller Area Network (CAN) bus. This means that the vehicle’s onboard computer system is not receiving the necessary data regarding the speed of the front right wheel.

BMW DTC P1777 symptoms

Symptoms associated with DTC P1777 on a BMW may include:

• ABS warning light illuminated on the dashboard
• Traction control system malfunction
• Unusual braking behavior, such as pulsation or uneven braking
• Loss of stability control

BMW DTC P1777 causes

The potential causes of DTC P1777 on a BMW include:

• Defective front right wheel speed sensor
• Faulty wiring or connectors related to the front right wheel speed sensor
• Issues with the CAN bus communication system
• Faulty ABS control module

BMW DTC P1777 seriousness

DTC P1777 should be addressed promptly as it can affect the proper functioning of the vehicle’s ABS and traction control systems. Driving with this fault unresolved may compromise the safety and stability of the vehicle, especially during braking and cornering maneuvers.

How to diagnose DTC P1777 on BMW

To diagnose DTC P1777 on a BMW, you can perform the following steps:

1. Use a diagnostic scan tool to retrieve the fault codes stored in the vehicle’s computer system.
2. Inspect the front right wheel speed sensor for any visible damage or contamination.
3. Check the wiring and connectors associated with the front right wheel speed sensor for any signs of wear, corrosion, or disconnection.
4. Test the front right wheel speed sensor using a multimeter to verify its functionality.
5. Check the CAN bus communication system for any faults or interruptions.

How to fix DTC P1777 on BMW

To fix DTC P1777 on a BMW, you can take the following actions:

1. Replace the front right wheel speed sensor if it is found to be faulty.
2. Repair or replace any damaged wiring or connectors related to the front right wheel speed sensor.
3. Address any issues with the CAN bus communication system, such as repairing damaged wires or connectors.
4. If necessary, replace the ABS control module to resolve the fault.

How to erase DTC P1777 on BMW

To erase DTC P1777 on a BMW, you can use a diagnostic scan tool to clear the fault codes stored in the vehicle’s computer system. After addressing the underlying issue causing the fault code, you can reset the system by erasing the code and performing a test drive to ensure that the fault does not reoccur.

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.