Jeep B23AA
Implausible Data Received from Rain Sensor - General Electrical Failure. Repair Procedure: Verify that the auto-on wiper selection within the radio settings is set to on and verify
Quick answer
B23AA-01 is a Jeep body/electrical DTC for implausible data received from the rain sensor. Verified manufacturer communications associate it with rain-sensitive wipers and/or automatic headlamps not functioning on specified US Grand Cherokee and Wagoneer vehicles.
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 B23AA mean?
B23AA-01 is a Jeep body/electrical DTC for implausible data received from the rain sensor. Verified manufacturer communications associate it with rain-sensitive wipers and/or automatic headlamps not functioning on specified US Grand Cherokee and Wagoneer vehicles.
2. Technical explanation
The verified DTC description is: “Implausible Data Received from Rain Sensor - General Electrical Failure.” NHTSA-hosted Jeep manufacturer communications identify B23AA-01 in connection with the Rain Sensor Module (RSM), rain-sensitive wipers, and automatic-headlamp operation. The supplied evidence does not establish a high-voltage or propulsion-system fault.
3. What system is affected?
Rain sensor / Rain Sensor Module (RSM), rain-sensitive wipers, and automatic-headlamp-related operation.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
- Rain-sensitive wipers may not function.
- Automatic headlamps may not function.
6. Possible causes
- The manufacturer communication directs verification that the auto-on wiper selection in the radio settings is enabled.
- The manufacturer communication directs verification that the customer-selected headlamp-switch position is set for AUTO-ON headlamps.
- The manufacturer communication directs inspection of the windshield area where the light/rain sensor is located. Further cause details are not established by the supplied 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
- Check the radio setting for auto-on wipers and ensure it is enabled.
- Check that the headlamp switch is set to AUTO-ON if automatic-headlamp operation is desired.
- Visually inspect the windshield area at the light/rain sensor for an apparent issue. Do not attempt electrical or sensor disassembly based on this page.
- Arrange diagnosis with an authorized Jeep service facility if the condition or DTC remains.
10. Step-by-step troubleshooting
- Verify that the auto-on wiper selection within the radio settings is set to on.
- Verify that the customer-selected headlamp switch position is positioned for AUTO-ON headlamps.
- Inspect the windshield area where the light/rain sensor is located. The supplied evidence does not provide the complete inspection criteria or subsequent repair steps.
11. When to contact service
Contact an authorized Jeep service facility if B23AA-01 remains stored or rain-sensitive wipers and/or automatic headlamps do not function after verifying the applicable settings.
12. What the service center may check
- Confirm the stored DTC(s) and the reported concern involving rain-sensitive wipers and/or automatic headlamps.
- Verify the auto-on wiper setting in the radio settings.
- Verify the headlamp switch position for AUTO-ON headlamps.
- Inspect the windshield area where the light/rain sensor is located.
- Use the applicable Jeep manufacturer communication for the complete diagnostic and repair procedure.
13. Possible repair or resolution
- The verified evidence specifies initial setting checks and windshield-area inspection.
- A final repair resolution is not yet established by the supplied verified evidence.
14. Affected vehicles
- Jeep Grand Cherokee · 2022–2024 · US
- Jeep Grand Cherokee · 2023–2025 · US
- Jeep Wagoneer · 2022–2024 · US
- Jeep Wagoneer · 2023–2025 · US
15. Related TSBs / service bulletins
- NHTSA Manufacturer Communication S2308000120 REV.C, published April 26, 2025; NHTSA document MC-11017355-0001. It lists B23AA-01 among possible DTCs, depending on vehicle.
- NHTSA Manufacturer Communication S2308000120, published September 28, 2023; NHTSA document MC-10244419-9999. It addresses rain-sensitive wipers and/or automatic headlamps not functioning and lists B23AA-01.
- NHTSA Manufacturer Communication S2308000120, published September 28, 2023; NHTSA document MC-10248580-9999. It contains the same verified evidence summary supplied for this code.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Official NHTSA-hosted manufacturer communications: https://static.nhtsa.gov/odi/tsbs/2025/MC-11017355-0001.pdf ; https://static.nhtsa.gov/odi/tsbs/2023/MC-10244419-9999.pdf ; https://static.nhtsa.gov/odi/tsbs/2023/MC-10248580-9999.pdf . Verified applicability: US Jeep Grand Cherokee model years 2022–2025 and US Jeep Wagoneer model years 2022–2025, with overlapping year ranges in the supplied data.
19. Frequently asked questions
What does Jeep code B23AA-01 mean?
It means “Implausible Data Received from Rain Sensor - General Electrical Failure.”
What vehicle functions may be affected?
Verified manufacturer communications associate the code with rain-sensitive wipers and/or automatic headlamps not functioning.
Can a setting cause this concern?
The manufacturer procedure instructs verification that auto-on wipers are enabled in radio settings and that the headlamp switch is set for AUTO-ON headlamps.
Is this an EV high-voltage or charging fault?
The supplied verified evidence identifies a rain-sensor-related body/electrical concern. It does not establish a high-voltage or charging-system fault.
Does this code apply to every Jeep?
No. The supplied applicability evidence covers specified US Grand Cherokee and Wagoneer model years only.