AutoCodes – RAM – B221D RAM

B221D RAM 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 RAM 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 2,982
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Oct 01, 2019
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Code B221D RAM 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 RAM - Rain Sensor Module Internal - AutoCodes.com
B221D RAM Code - Rain Sensor Module Internal

What are the Possible Causes of the DTC B221D RAM?

  • 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 RAM?

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 RAM 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.

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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 RAM Code

1. What are common symptoms of OBDII code B221D RAM for Rain Sensor Module Internal?

The common symptoms include the windshield wipers not functioning properly in response to rain, inconsistent wiper speed, or complete failure of the rain sensor system.

2. What are the possible causes of OBDII code B221D RAM for Rain Sensor Module Internal?

Some possible causes include a faulty rain sensor module, damaged wiring or connectors related to the rain sensor system, or a software issue within the vehicle's control module.

3. How can I diagnose the OBDII code B221D RAM for Rain Sensor Module Internal?

Diagnosis typically involves using a professional OBDII scanner to retrieve the specific trouble code, inspecting the rain sensor module and its wiring for any visible damage, and performing a system reset to see if the issue persists.

4. Can I repair OBDII code B221D RAM for Rain Sensor Module Internal myself?

Depending on your level of automotive expertise, you may be able to repair this issue yourself by replacing the faulty rain sensor module, repairing any damaged wiring, or resetting the system. However, professional assistance may be required for complex repairs or reprogramming.

5. Is it safe to continue driving with OBDII code B221D RAM for Rain Sensor Module Internal?

While driving with this code may not directly impact the vehicle's drivability, it is important to address the issue promptly to ensure the proper functioning of the rain sensor system, which is crucial for visibility during inclement weather.

6. How much does it typically cost to repair OBDII code B221D RAM for Rain Sensor Module Internal?

The cost of repairing this issue can vary depending on the specific cause, the need for replacement parts, and whether professional labor is required. It's advisable to obtain quotes from automotive repair shops for an accurate estimate.

7. Are there any preventive measures to avoid OBDII code B221D RAM for Rain Sensor Module Internal?

To prevent this code from occurring, regular maintenance of the rain sensor system, such as keeping the windshield clean and checking for any signs of damage, can help maintain its functionality and potentially avoid issues.

8. Can extreme weather conditions contribute to triggering OBDII code B221D RAM for Rain Sensor Module Internal?

Yes, extreme weather conditions such as heavy rain, snow, or exposure to harsh sunlight can potentially affect the performance of the rain sensor module and may lead to triggering this specific OBDII code.

9. What should I do if OBDII code B221D RAM for Rain Sensor Module Internal keeps recurring after repairs?

If the code continues to reappear after repairs, it may indicate a persistent underlying issue that requires further diagnosis by a professional technician to ensure that all potential causes have been properly addressed.

10. How long does it typically take to repair OBDII code B221D RAM for Rain Sensor Module Internal?

The repair time can vary depending on the complexity of the issue, the availability of replacement parts, and the expertise of the technician. Simple repairs may be completed within a few hours, while more intricate problems could take longer to resolve.

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