Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Radar Sensor Module - Long Range Learn: Notes
An ADAPTIVE CRUISE TEMPORARILY UNAVAILABLE message may be displayed on the driver information center if this calibration procedure is required. The B233B Radar Sensor Module - Long Range may have become misaligned.
After replacing and programming the B233B Radar Sensor Module - Long Range, it is necessary to perform a calibration procedure to align the radar. This is indicated by DTC B101E 4B being set as current. Calibration is performed while driving the vehicle with the scan tool connected. Calibration is initialized using a scan tool and the scan tool must remain connected until calibration is complete. During this time the SERVICE DRIVER ASSIST message will be displayed on the driver information center. Once the procedure is complete, the message will turn off and normal operation will resume.
Calibration is not required if the existing B233B Radar Sensor Module - Long Range was only programmed. Calibration needs to be conducted if the B233B Radar Sensor Module - Long Range was replaced or removed and re-secured.
If calibration is not successful, it could be due to improper driving environment, radar and bracket assembly bent out of position, or incorrect radar mounting. A typical driving environment is usually sufficient to calibrate the module within 10 - 30 minutes. Visually inspect for damaged, bent, or broken B233B Radar Sensor Module - Long Range bracket. Brackets out of level more than 2 degrees will not calibrate or self-learn. Discuss with the customer about vehicle history and possible past accident. Replace bracket if damaged.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.