# U0402 on the 2022 Ram 1500

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

Nobody has written a description of this code yet.

## Bulletins for this model year that name U0402

- [10248622](https://open.wenmarpro.com/bulletins/10248622), 2024-01-08: Flash: Powertrain Control Module \(PCM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Trouble Codes \(DTCs\) have been set: ?\*\*P1524 \- Oil Pressure Out Of Range \- Camshaft Advance/Retard Disabled. ? P219A \- Bank 1 Air\-Fuel Ratio Imbalance.\*\* ? U0402\-00 Implausible Data Received from the TCM. \(When U0402\-00 sets in the PCM, the module will start to deny torque requests from the Transmission Control Module \(TCM\). The transmission will fault and go to a fixed gear limp\-inreaction, and send the MIL request to PCM.\) The customer may also experence the following: ? A limp mode when the DTC sets in the PCM. This bulletin involves reprogramming the PCM with the latest available software.
- [10244461](https://open.wenmarpro.com/bulletins/10244461), 2023-10-30: Flash: Powertrain Control Module \(PCM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find that one or more of the following Diagnostic Trouble Codes \(DTCs\) have been set: ?\*\*P1524 \- Oil Pressure Out Of Range \- Camshaft Advance/Retard Disabled. ? P219A \- Bank 1 Air\-Fuel Ratio Imbalance.\*\* ? U0402\-00 Implausible Data Received from the TCM. \(When U0402\-00 sets in the PCM, the module will start to deny torque requests from the Transmission Control Module \(TCM\). The transmission will fault and go to a fixed gear limp\-inreaction, and send the MIL request to PCM.\) The customer may also experence the following: ? A limp mode when the DTC sets in the PCM. This bulletin involves reprogramming the PCM with the latest available software.
- [10239930](https://open.wenmarpro.com/bulletins/10239930), 2023-07-31: Flash: Powertrain Control Module \(PCM\) Updates Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code \(DTC\) has been set: ? U0402\-00 \- IMPLAUSIBLE DATA RECEIVED FROM TCM. When U0402\-00 sets in the PCM, the module will start to deny torque requests from Transmission Control Module \(TCM\), the transmission will fault and go to a fixed gear limp\-in reaction, and send the MIL request to PCM. The customer may also experience the following: ? A limp mode when DTC sets in the PCM. This bulletin involves reprogramming the PCM with the latest available software.
- [10231802](https://open.wenmarpro.com/bulletins/10231802), 2023-02-13: Flash: Hybrid Control Processor \(HCP\) Updates 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 \(DTCs\) have been set: P1C64 \- Hybrid Perf Engine Speed Below Target During Autostart. U0402 \- Implausible Data Received From TCM. Customers may also comment on one or more of the following: During an Engine Stop/Start \(ESS\) event, the autostart fails and the AutoPark engages. Transmission is in Limp Mode. This bulletin involves updating the HCP with the latest available software.
- [10229790](https://open.wenmarpro.com/bulletins/10229790), 2023-01-17: 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 ofthe following DTCs have been set: U0402\-00 \- Implausible Data Received From TCM. P1C64 \- Hybrid Perf \- Engine Speed Below Target During Autostart. In addition, the following software enhancement is available: Engine Stop/Start \(ESS\) improvements \- Improvements to make ESS more smooth/consistent. Customers may complain of rough or inconsistentautostarts. The customer may also describe one or more of the following: Coast down engine idle improvements \(related to two\-foot driving below 19kph \(12 mph\). During an ESS event, the autostart fails and the AutoPark engages. Transmission is in Limp Mode.
- [10227987](https://open.wenmarpro.com/bulletins/10227987), 2022-12-19: Customer complaint may include a Mil/check engine lamp on condition. Other driveablility complaints may include, trans will not shift, stuck in gear, vehicle in limp mode, lack of power, vibration. Upon further investigation, a DTC for U0402 \- Implausible Data Received From TCM may be set in the PCM.
- [10214603](https://open.wenmarpro.com/bulletins/10214603), 2022-06-27: 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 ofthe following Diagnostic trouble Codes \(DTCs\) have been set: P1C64 \- Hybrid Perf \- Engine Speed Below Target During Autostart. U0402 \- Implausible Data Received From TCM. The customer may also describe one or more of the following: During a Engine Stop/Start \(ESS\) event, the autostart fails and the AutoParkengages. Transmission is in Limp Mode.