Dodge B221D
Rain Sensor Module (RSM) Internal B23AA-01- Implausible Data Received from Rain Sensor B225F-49 - Light sensor Internal B11FA-49 - Hum
Quick answer
B221D is documented for certain 2024–2026 Dodge Charger vehicles in the US as a Rain Sensor Module (RSM) internal fault code. Official manufacturer communications also list related rain, light-sensor, and humidity-sensor fault entries in this condition set.
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
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1. What does B221D mean?
B221D is documented for certain 2024–2026 Dodge Charger vehicles in the US as a Rain Sensor Module (RSM) internal fault code. Official manufacturer communications also list related rain, light-sensor, and humidity-sensor fault entries in this condition set.
2. Technical explanation
Verified manufacturer communications identify B221D variants including B221D-00, Rain Sensor Module (RSM) Internal, and B221D-49, Rain Sensor Module (RSM) Internal Electronic Failure. The supplied diagnostic record also associates this condition with B23AA-01, implausible data received from the rain sensor; B225F-49, light sensor internal; and B11FA-49, humidity sensor internal. The exact root cause and the prescribed repair are not yet established by the supplied verified evidence.
3. What system is affected?
Rain Sensor Module (RSM), with documented related light-sensor and humidity-sensor fault entries.
4. How serious is this code?
Unknown. The supplied verified evidence does not provide a severity classification.
5. Symptoms you may notice
- The verified evidence states that one or more functions were not functioning, but it does not identify the specific affected functions.
- Rain Sensor Module internal fault entries may be stored, including B221D-00 or B221D-49.
- Related rain-sensor, light-sensor, and humidity-sensor fault entries may be stored as listed in the manufacturer communication.
6. Possible causes
- Rain Sensor Module internal condition or internal electronic failure, as described by B221D-00 and B221D-49.
- Further underlying causes are not yet established by verified evidence.
7. Can I still drive the vehicle?
Not yet established by verified evidence.
8. Can I charge the vehicle?
Not yet established by verified evidence.
9. What you can safely do
- Record all stored diagnostic trouble codes and their suffixes before clearing them.
- Arrange diagnosis by a Dodge-authorized service facility or qualified technician.
- Do not attempt high-voltage-system repairs based on this code; the verified evidence identifies a sensor/module diagnostic condition and provides no high-voltage repair procedure.
10. Step-by-step troubleshooting
- Confirm whether B221D-00 or B221D-49 is stored, along with any B23AA, B225F, or B11FA entries.
- Provide the vehicle identification number, model year, and all stored codes to the servicing dealer so they can determine whether the manufacturer communication applies.
- Further diagnostic steps are not yet established by the supplied verified evidence.
11. When to contact service
Service is not explicitly required by the supplied record, but professional diagnosis is appropriate because the fault is identified as an internal Rain Sensor Module condition and official manufacturer communications exist for applicable Dodge Charger vehicles.
12. What the service center may check
- Verify the applicable diagnostic trouble code variant and any companion codes.
- Check whether manufacturer communication S2308000120 applies to the vehicle.
- Additional service checks are not yet established by verified evidence.
13. Possible repair or resolution
- Not yet established by verified evidence.
14. Affected vehicles
- Dodge Charger · 2024–2026 · US
- Dodge Charger · 2024–2025 · US
15. Related TSBs / service bulletins
- Official manufacturer communication S2308000120 REV.F, published February 6, 2026, NHTSA document MC-11028744-0001. It lists B221D-00, B221D-49, and related sensor diagnostic entries depending on the vehicle.
- Official manufacturer communication S2308000120 REV.E, published January 16, 2026, NHTSA document MC-11027736-0001.
- Official manufacturer communication S2308000120 REV.C, published April 26, 2025, NHTSA document MC-11017355-0001. It references B221D-49 and related B23AA-01, B225F-49, and B11FA-49 entries.
16. Recall information
- No recall is established by the supplied verified evidence.
17. Official manufacturer information
NHTSA-hosted manufacturer communications: https://static.nhtsa.gov/odi/tsbs/2026/MC-11028744-0001.pdf ; https://static.nhtsa.gov/odi/tsbs/2026/MC-11027736-0001.pdf ; https://static.nhtsa.gov/odi/tsbs/2025/MC-11017355-0001.pdf
19. Frequently asked questions
What does Dodge code B221D mean?
The supplied verified evidence identifies B221D as a Rain Sensor Module internal condition. B221D-49 is specifically described as Rain Sensor Module Internal Electronic Failure.
Which vehicles are documented as applicable?
The supplied applicability evidence lists US-market 2024–2026 Dodge Charger vehicles. One record ends at 2025 and another ends at 2026.
Is B221D safe to drive with?
Not yet established by verified evidence.
Does B221D affect EV charging?
Not yet established by verified evidence.
Is there an official service bulletin or manufacturer communication?
Yes. The supplied evidence includes NHTSA-hosted Dodge manufacturer communications under S2308000120, revisions C, E, and F.