Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2015 GMC Yukon XL, 2015 GMC Yukon, 2015 Chevrolet Tahoe, 2015 Chevrolet Suburban, and 2015 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
- If DTC B390A 58 is set, check for anything that can interfere with the radar signal. Verify area in front of radar is clean of mud, ice, snow, etc. Also verify the fascia panels in front of the radar are damage-free and not obstructed by any add-on accessories such as emblems, stickers, etc.
- If the vehicle fascia is clean, unobstructed, and damage free, and B390A 58 is still set as current, the radar sensor has detected a blockage condition and will not been able to clear it until certain conditions are met. It is necessary to drive the vehicle at a speed greater than 9 km/h (6 mph) and allow the radar sensor to be exposed to other vehicles and traffic in the direction of the radar sensor field of view. Usually, a short drive in normal traffic conditions will allow the radar sensor to clear the blockage condition.
- The radar sensor modules - short range cannot be swapped from side to side once they have been installed. DTC B390A 67 may set if a radar sensor module - short range is reinstalled on the incorrect side of the vehicle.