Possible Causes

WARNING: This page is about a different car, the 2015 Land Rover LR2, 2014 Land Rover LR2, and 2013 Land Rover LR2. However, it is still accessible from the selected car via links, so may be relevant.

Navigation system road speed signal inconsistent with MOST road speed signal
Speed signal broadcast on MOST is not received by the integrated audio module

NOTE:

This DTC may be set when the vehicle is being transported
This DTC may be set even though no fault condition is present and should be ignored unless the customer has reported a navigation system concern. Clear the DTC and retest. Verify the customer concern prior to diagnosis

Check the anti-lock brake system control module for related DTCs and refer to the relevant DTC index. Test the power and ground supplies to integrated audio module. Using the manufacturer approved diagnostic system, perform a network integrity test. Check MOST ring for breaks. If no fault found, suspect integrated audio module internal fault