B18B4

DTC Troubleshooting: B18B4

DTC B18B4:

Left BSI Radar Unit Dirty

1. Check the outside of rear bumper for snow, ice, dirt, contaminants, or stickers.

2. From the left rear wheel arch, remove the screws securing the rear bumper.

3. Gently pull on the rear bumper (A) at the left rear wheel arch area to release it from the hooks (B) on the side spacer (C). Do not pull the rear bumper forcibly.






4. Check the inside of the rear bumper for snow, ice, dirt, or contaminants. Also, check the left BSI radar unit surface for dirt or contaminants.

Is it OK?

YES -

Intermittent failure due to temporary contamination around the rear bumper, the system is OK at this time. Clear the DTCs.�

NO -

Go to step 5.

5. Remove the rear bumper Service and Repair, and wipe off the dirt or contaminants.

6. Check the sensor cover for proper installation.

Is it OK?

YES -

Intermittent failure due to temporary contamination around the rear bumper, the system is OK at this time. Clear the DTCs.�

NO -

Install the sensor cover properly. If it is damaged, replace the left BSI radar unit BSI Radar Unit Removal/Installation.�