AutoCodes – Generic – B221D

B221D Code - Rain Sensor Module Internal

Quick Answer

The Body Control Module (BCM) is the Local Interconnect Network (LIN) master for the Light Rain Sensing Module (LRSM). Common causes include Faulty Light Rain Sensing Module (LRSM), Light Rain Sensing Module (LRSM) harness is open or shorted, Light Rain Sensing Module (LRSM) circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B221D indicates Rain Sensor Module Internal.
Common causes: Common causes include Faulty Light Rain Sensing Module (LRSM), Light Rain Sensing Module (LRSM) harness is open or shorted, Light Rain Sensing Module (LRSM) circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 4,529

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Oct 01, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B221D Description

The Body Control Module (BCM) is the Local Interconnect Network (LIN) master for the Light Rain Sensing Module (LRSM). The LRSM performs an internal self test and sends the information to the BCM. The repair of this fault condition does not involve any external circuitry and centers on verifying the integrity of the internal circuitry and software validity. The Diagnostic Trouble Code (DTC) is set when the Light Rain Sensing Module (LRSM) detects an internal failure.

OBDII Code B221D - Rain Sensor Module Internal - AutoCodes.com — B221D Code - Rain Sensor Module Internal

What does this mean?

What are the Possible Causes of the DTC B221D?

Faulty Light Rain Sensing Module (LRSM)
Light Rain Sensing Module (LRSM) harness is open or shorted
Light Rain Sensing Module (LRSM) circuit poor electrical connection

How to Fix the DTC B221D?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B221D code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B221D code?

Need more information on how to fix the B221D code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B221D code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B221D Chrysler — Rain Sensor Module Internal
B221D Dodge — Rain Sensor Module Internal
B221D Jeep — Rain Sensor Module Internal
B221D RAM — Rain Sensor Module Internal

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B221D Code

1. What are common symptoms of OBDII code B221D (Rain Sensor Module Internal)?

- Common symptoms include malfunctioning windshield wipers, failure of the rain sensor system, and intermittent operation of the automatic wipers.

2. What are the possible causes of OBDII code B221D?

- The code B221D typically indicates a fault within the rain sensor module itself, such as internal circuit issues or sensor malfunction.

3. How can I diagnose OBDII code B221D related to the Rain Sensor Module Internal?

- Diagnosis usually involves checking the rain sensor module connections, inspecting the wiring for any damage, and testing the functionality of the rain sensor system.

4. Can a faulty windshield wiper motor cause OBDII code B221D?

- While a faulty windshield wiper motor can affect the operation of the wipers, it is not a direct cause of OBDII code B221D related to the rain sensor module internal.

5. What are some repair tips for fixing OBDII code B221D?

- Repairing this code may involve replacing the rain sensor module, checking and repairing any damaged wiring, or recalibrating the rain sensor system.

6. Can a DIY enthusiast fix OBDII code B221D at home?

- DIY enthusiasts with automotive repair experience may be able to address OBDII code B221D by following a repair manual specific to their vehicle's make and model.

7. Is it safe to continue driving with OBDII code B221D unresolved?

- While the vehicle may still be operable with OBDII code B221D, it is recommended to address the issue promptly to ensure proper operation of the rain sensor system.

8. Can a disconnected rain sensor module trigger OBDII code B221D?

- Yes, a disconnected or improperly connected rain sensor module can trigger OBDII code B221D due to a lack of communication or signal from the module.

9. How much does it typically cost to repair OBDII code B221D?

- Repair costs for OBDII code B221D can vary depending on the vehicle make and model, the extent of the issue, and whether professional repair services are needed.

10. Will resetting the vehicle's computer clear OBDII code B221D?

- Resetting the vehicle's computer may temporarily clear the code, but if the underlying issue with the rain sensor module is not addressed, the code is likely to reappear.