# Service bulletin 0814823

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10241100
- Published by NHTSA: 2023\-08\-21
- Manufacturer's number: 0814823
- Manufacturer's date: 2023\-06\-17
- NHTSA component: STEERING; ELECTRICAL SYSTEM

## NHTSA's summary

Flash: Electric Power Steering \(EPS\) Module Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find that the following DTC has been set: ? C0529\-00 \- Steering Angle Sensor Module Missing Calibration \- No Subtype Information. The customer may experience the following: ? During a key OFF and ON action, rotating the steering wheel without any power assist, the Malfunction Indicator Light \(MIL\) ON will be activated due to a loss of calibration of the steering angle sensor. After turning the steering wheel lock to lock, the MIL will be switched off. This bulletin involves updating the EPS module with the latest available software. CAUTION\! The supplier of this EPS has indicated multiple update steps are required to completely update this EPS prior to returning to the customer.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10241100-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10241100-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Steering

## Trouble codes named

C0529

## Vehicles listed

- 2023 DODGE HORNET

## Recalls for the same vehicles and component

- [23V623000](/recalls/nhtsa/23V623000.md), 2023-09-07: ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES; ELECTRICAL SYSTEM:PROPULSION SYSTEM: CABLES:FASTENER/CONNECTOR

## Other bulletins for the same vehicles and component

- [08\-252\-26](/bulletins/11034365.md), 2026-07-02, Service bulletin: ELECTRICAL SYSTEM; SEATS. Heated Seats and Heated Wheel Turn Off Or Become Disabled Customers may comment on the following: ● Customer may comment that their Heated Seats and Heated Steering Wheel will turn off or become disabled \(button grayed out on display screen\) while driving the vehicle.
- [08\-200\-26](/bulletins/11032828.md), 2026-05-20, Service bulletin: ELECTRICAL SYSTEM. Instrument Panel Cluster \(IPC\) Content Missing Or Screen Blank Customers may experience the following: ● IPC content missing, display abnormal or screen blank
- [08\-200\-26](/bulletins/11032651.md), 2026-05-13, Service bulletin: ELECTRICAL SYSTEM. Instrument Panel Cluster \(IPC\) Content Missing Or Screen Blank Customers may experience the following: ● IPC content missing, display abnormal or screen blank
- [08\-148\-26](/bulletins/11031428.md), 2026-04-22, Service bulletin: ELECTRICAL SYSTEM. The following software enhancement is available: ● This software update enables the feature Active Cabin Ventilation \(ACV\). This bulletin provides information regarding the latest Firmware Over The Air \(FOTA\) update and provides the service technician an overview of the steps a customer will need to take to complete the update. The TBM software will be updated from 5.49.0, 5.53.0 or 5.43 to 5.53 software level. NOTE: National launch for this FOTA update is expected to begin: April 14, 2025.
- [S228A000025 REV.A](/bulletins/11029705.md), 2026-03-05, Service bulletin: ELECTRICAL SYSTEM. Harman R1H Uconnect 5 Radio Software Flash Error Codes
- [08\-394\-25 REV. A](/bulletins/11026677.md), 2025-12-17, Service bulletin: ELECTRICAL SYSTEM. Telematics Box Module \(TBM\) Backup Battery Replacement When DTC B1E21 Is Present Technicians may experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle may exhibit/set the following Diagnostic Trouble Code \(DTC\): ● B1E21\-96 \- Backup Battery Component Internal Failure.
- [9100734](/bulletins/11026660.md), 2025-12-17, Service bulletin: ELECTRICAL SYSTEM. If the DTC B1E21\-96: Backup Battery\-Component Internal Failure is active and customer states Popup message will show at the radio: "Battery of Uconnect Box requires service. SOS call and related functions may be unavailable. Please visit an authorized dealer." PLEASE do not Replace the TBM module, only replace TBM Internal Battery \(inside Telematics Box Module\) and order PN68493347
- [08\-394\-25](/bulletins/11026549.md), 2025-12-11, Service bulletin: ELECTRICAL SYSTEM. Telematics Box Module \(TBM\) Backup Battery Replacement When DTC B1E21 Is Present echnicians may experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle may exhibit/set the following Diagnostic Trouble Code \(DTC\): ● B1E21\-96 \- Backup Battery Component Internal Failure
- [S2508000101](/bulletins/11025514.md), 2025-11-13, Service bulletin: ELECTRICAL SYSTEM. Intermittent Uconnect Box Requires Service Message. TBM Setting Stored Or Pending DTCs B22A9, B1560, B1561, B1562
- [08\-370\-25](/bulletins/11025500.md), 2025-11-13, Service bulletin: ELECTRICAL SYSTEM. R1H Radio U33.43 USB Software Update Customers may experience one or more of the following: ● \*\*Head Unit \(HU\) does not show the Charge/Climate Summary popup after key off. ● Performance Pages disappear. ● Blind spot chime does not work if CAN activation signals duration is less than two seconds.\*\* ● Speed limit sign on Instrument Panel Cluster \(IPC\) is showing incorrect speed. ● Touch freeze/Disassociated Center Stack Display \(DCSD\) off. ● CP/AA wireless disconnection This bulletin involves inspecting radio software level and if the software level is at or below U27.52, updating it with a USB to U29.42 first and then a second update to U33.43.\*\*

JSON: [/v1/bulletins/10241100](/v1/bulletins/10241100)

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