Service bulletin 0803721
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 | 10220958 |
| Published by NHTSA | 2022-09-26 |
| Manufacturer's number | 0803721 |
| Manufacturer's date | 2021-03-16 |
| NHTSA component | ELECTRICAL SYSTEM |
NHTSA's summary
Flash: Hybrid Control Processor (HCP) Updates This bulletin involves updating the HCP with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs). P1A26-00 - BPCM Hybrid Battery State Of Charge Performance. P0A7E-00 - Hybrid/EV Battery Pack Over Temperature. U1003-00 - ESP Can C Bus Performance. P2534-00 - Ignition Switch Run/Start Position Circuit Low. P0506 - Idle Speed Performance Lower Than Expected. P0507 - Idle Speed Performance Higher Than Expected. One Trip DTC Changed to a Two Trip DTC.P0AC6-00 - Hybrid/Ev Battery Temperature Sensor 2 Circuit Performance. P0ACB-00 - Hybrid/Ev Battery Temperature Sensor 3 Circuit Performance. U0121-00 - Lost Communication With Anti-Lock Brake System (ABS) Control Module. U0140-00 - Lost Communication With Body Control Module. U1818-00 - Lost Communication With ECM/PCM On D-PT Can. U0100-00 - Lost Communication With ECM/PCM. U0102-00 - Lost Communication With Transfer Case Control Module / AWD. U1003-00 - ESP Can C Bus Performance. P0562 - Battery/System Voltage Low. P060C-00 - Internal Control Module Main Processor Performance. U0415-00 - Implausible Data Received From ABS. U1850-00 - Implausible Data Received From PCM on D-PT. Two Trip DTC Changed to a One Trip DTC.P0E52-00 - DC/DC Converter Current Sensor Circuit A Range/Performance. P0C39-00 - DC/DC Converter Temperature Sensor 1 Performance. P0C3E-00 - DC/DC Converter Temperature Sensor 2 Performance. P0E59-00 - DC/DC Converter Temperature Sensor C Circuit Range/Performance. P0E32-00 - DC/DC Converter Voltage Sensor 1 Performance. P0E37-00 - DC/DC Converter Voltage Sensor 2 Performance. P2C8D-00 - DC/DC Converter Temperature Sensor "D" Circuit Range/Performance. P2535-00 - Ignition Switch Run/Start Position Circuit High. P2534-00 - Ignition Switch Run/Start Position Circuit Low.
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Electrical system
Trouble codes named
P0506, P0507, P0562, P060C, P0A7E, P0AC6, P0ACB, P0C39, P0C3E, P0E32, P0E37, P0E52, P0E59, P1A26, P2534, P2535, P2C8D, U0100, U0102, U0121, U0140, U0415, U1003, U1818, U1850
| RAM 1500 | 2021 |
|---|
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 25V298000 | 2025-05-08. AIR BAGS; ELECTRICAL SYSTEM:WIRING |
|---|
A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.
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| 08-208-26 REV. A | 2026-05-20. Service bulletin. Radio Message "Power Surge On USB Detected" Customers may comment on the following: ● The radio displays the message: “Power surge on USB hub detected” Fig. 1. NOTE: After the message appears, no USB devices function in the hub (no charging, no data). NOTE: Hub operation does not return until the vehicle undergoes a full key cycle. |
| 18-053-26 | 2026-05-20. Service bulletin. Flash: Powertrain Control Module (PCM) Updates Customers may experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle may exhibit/set the following Diagnostic Trouble Code (DTC): ● P219A - Bank 1 Air-Fuel Ratio Imbalance Bank 1. Customers may also comment on the following: ● **Potential under run or stall when the vehicle utilizes the Trailer Reverse Steering Control feature and is connected to a trailer attempting to backup.** This bulletin involves reprogramming the PCM with the latest available software. |
| 08-208-26 | 2026-05-20. Service bulletin. Radio Message "Power Surge On USB Detected" Customers may comment on the following: ● The radio displays the message: “Power surge on USB hub detected” Fig. 1. NOTE: After the message appears, no USB devices function in the hub (no charging, no data). NOTE: Hub operation does not return until the vehicle undergoes a full key cycle |