# Service bulletin S2321000009

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: 10248583
- Published by NHTSA: 2024\-01\-08
- Manufacturer's number: S2321000009
- Manufacturer's date: 2023\-09\-29
- NHTSA component: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\)

## NHTSA's summary

MIL On with TCM P1DB7 Active

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10248583-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10248583-9999.pdf)

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

## Components

Transmission and driveline, Automatic transmission, Transmission control module

## Trouble codes named

P1DB7

## Vehicles listed

- 2022 to 2023 JEEP GRAND CHEROKEE
- 2022 to 2023 RAM 1500

## Recalls for the same vehicles and component

- [26V413000](/recalls/nhtsa/26V413000.md), 2026-06-30: POWER TRAIN:AUTOMATIC TRANSMISSION:GEAR POSITION INDICATION \(PRNDL\)
- [24V413000](/recalls/nhtsa/24V413000.md), 2024-06-06: POWER TRAIN:MANUAL TRANSMISSION; POWER TRAIN:AUTOMATIC TRANSMISSION

## Other bulletins for the same vehicles and component

- [S2309000012](/bulletins/10248869.md), 2024-01-16, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM. Mil\-On/Check Engine Lamp\-On with DTC P06DD set in the powertrain control module \(PCM\).
- [S2321000009](/bulletins/10248859.md), 2024-01-16, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:TORQUE CONVERTER. Malfunction Indicator Lamp \(MIL\) Illuminated. Active Diagnostic Trouble Code \(DTC\) P1DB7\-00 ? Torque Converter Clutch Performance, Set.
- [1800123](/bulletins/10248622.md), 2024-01-08, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM. 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.
- [1809823](/bulletins/10248600.md), 2024-01-08, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM. Flash: Powertrain Control Module \(PCM\) Update 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. This bulletin involves reprogramming the PCM with the latest available software.
- [1801323](/bulletins/10248598.md), 2024-01-08, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); POWER TRAIN. Flash: Powertrain Control Module \(PCM\) Updates Customers may experience one or more of the following: ? Engine must be started twice to achieve drive ready \(at low temperatures around \-30°C, \-22°F\) when the vehicle was entered and started quickly. ??Performance Limited, Service Fuel System? popup while driving. ? Unable to enter electric mode driving while Fuel Oil Refresh Mode \(FORM\) is active. This bulletin involves reprogramming the PCM with the latest available software NOTE: Additional module flashes are required for this update to be effective, the following modules are all to be updated along with this HCP and AHCP update: ? Transmission Control Module \(TCM\). ? Hybrid Control Processor \(HCP\) and Auxiliary Hybrid Control Processor \(AHCP\) also known as Power Inverter Module \(PIM\) module.
- [1809923](/bulletins/10248595.md), 2024-01-08, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Flash: Powertrain Control Module \(PCM\) Update Customers may experience the following: ? Poor fuel economy. This bulletin involves reprogramming the PCM with the latest available software.
- [S2308000118](/bulletins/10248573.md), 2024-01-08, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Malfunction Indicator Lamp \(MIL\) on, P0052, P0152, O2 Sensor High, P0113 Intake Air Sensor \(IAT\)
- [S2321000005](/bulletins/10248561.md), 2024-01-08, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION. Transmission Fluid Leak From Under The Vehicle.
- [1800123](/bulletins/10244461.md), 2023-10-30, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); POWER TRAIN. 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.
- [1809823](/bulletins/10244439.md), 2023-10-30, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); POWER TRAIN. Flash: Powertrain Control Module \(PCM\) Update 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. This bulletin involves reprogramming the PCM with the latest available software.

JSON: [/v1/bulletins/10248583](/v1/bulletins/10248583)

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