# Service bulletin 1810023

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: 10248615
- Published by NHTSA: 2024\-01\-08
- Manufacturer's number: 1810023
- Manufacturer's date: 2023\-09\-16
- NHTSA component: ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\)

## NHTSA's summary

Flash: Powertrain Control Module \(PCM\) 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 \(DTCs\) has been set: ?\*\*P0441 \- EVAP Purge System Performance \(for North America and Mexico markets only\).\*\* ? P0456 \- EVAP System Small Leak. NOTE: \*\* If DTC P0456 is present, use the wiTECH Small Leak Verification Test \(SLVT\) to determine if a leak is present in the system. \*\* This bulletin involves reprogramming the PCM with the latest available software.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10248615-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10248615-9999.pdf)

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

## Components

Electrical system, Transmission and driveline, Automatic transmission, Transmission control module

## Trouble codes named

P0441, P0456

## Vehicles listed

- 2019 JEEP GRAND CHEROKEE

## Other bulletins for the same vehicles and component

- [1810023](/bulletins/10244454.md), 2023-10-30, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); POWER TRAIN; ELECTRICAL SYSTEM. Flash: Powertrain Control Module \(PCM\) 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 \(DTCs\) has been set: ?\*\*P0441 \- EVAP Purge System Performance \(for North America and Mexico markets only\).\*\* ? P0456 \- EVAP System Small Leak. NOTE: \*\* If DTC P0456 is present, use the wiTECH Small Leak Verification Test \(SLVT\) to determine if a leak is present in the system. \*\* This bulletin involves reprogramming the PCM with the latest available software.
- [S1808000152](/bulletins/10234438.md), 2023-04-17, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). CEL \(Check Engine Lamp\) Illuminates, Recent PCM Replace or Flash Update Performed, Diagnostic Trouble Codes \(DTCs\) P057B Brake Pedal Position Sensor Circuit Performance, P1572 Brake Pedal Stuck, C0042\-54 Brake Pedal Missing Calibration
- [1815022](/bulletins/10230549.md), 2023-01-23, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM. Powertrain Control Module \(PCM\) Updates
- [S1925000008](/bulletins/10214560.md), 2022-06-27, Service bulletin: ENGINE AND ENGINE COOLING; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ELECTRICAL SYSTEM. Malfunction Indicator Lamp \(MIL\) Illumination. Diagnostic Trouble Codes \(DTCs\) P208B ? Reductant Pump 1 Control Performance, and/or P20E8 ? Reductant Pressure Too Low, Set.
- [18\-002\-20 REV. C](/bulletins/10184762.md), 2020-12-28, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Flash: Powertrain Control Module \(PCM\) Updates \- AN\-K8\-18\-20201002 Refer to China Joint Venture \(JV\) released document AN\-K8\-18\-20201002, for details on this service action.
- [S2025000001 Rev.](/bulletins/10184701.md), 2020-12-28, Service bulletin: EXTERIOR LIGHTING; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); EQUIPMENT. \(Rev. B\) Malfunction Indicator Lamp Illumination \(MIL\). Diagnostic Trouble Code \(DTC\) P203E ? Reductant Level Sensor 1 Circuit Intermittent\-Erratic Set.
- [18\-002\-20 REV. C](/bulletins/10184462.md), 2020-12-21, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Flash: Powertrain Control Module \(PCM\) Updates \- AN\-K8\-18\-20201002 Refer to China Joint Venture \(JV\) released document AN\-K8\-18\-20201002, for details on this service action.
- [S1925000008 Rev.](/bulletins/10184406.md), 2020-12-21, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\); ENGINE; FUEL SYSTEM, DIESEL. \(Rev. B\) Malfunction Indicator Lamp \(MIL\) Illumination. Diagnostic Trouble Codes \(DTCs\) P20E8 ? Reductant Pressure Too Low and/or P208B ? Reductant Pump 1 Control Performance Set.
- [S2025000001 Rev.](/bulletins/10184401.md), 2020-12-21, Service bulletin: ELECTRICAL SYSTEM; FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). \(Rev. B\) Malfunction Indicator Lamp Illumination \(MIL\). Diagnostic Trouble Code \(DTC\) P203E ? Reductant Level Sensor 1 Circuit Intermittent\-Erratic Set.
- [18\-090\-20](/bulletins/10181630.md), 2020-10-26, Service bulletin: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Flash: Powertrain Control Module \(PCM\) Updates \- AN\-K8PHEV\-18\-20200905 Refer to China Joint Venture \(JV\) released document AN\-K8PHEV\-18\-20200905, for details on this service action.

JSON: [/v1/bulletins/10248615](/v1/bulletins/10248615)

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