# Service bulletin 18\-089\-24

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: 11012184
- Published by NHTSA: 2025\-01\-03
- Manufacturer's number: 18\-089\-24
- Manufacturer's date: 2024\-12\-19
- NHTSA component: POWER TRAIN
- Manufacturer's system: Powertrain Control Module

## NHTSA's summary

"Flash: Powertrain Control Module \(PCM\) Updates Customers must experience a Malfunction Indicator Lamp \(MIL\) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes \(DTCs\): ● \*\*P0420 \- Catalyst System Efficiency Below Threshold Bank 1. ● P0430 \- Catalyst System Efficiency Below Threshold Bank 2.\*\* ● 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/2024/MC-11012184-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11012184-9999.pdf)

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

## Components

Transmission and driveline

## Trouble codes named

P0420, P0430, P0456

## Vehicles listed

- 2019 CHRYSLER 300

## Other bulletins for the same vehicles and component

- [S2621000004](/bulletins/11038329.md), 2026-10-07, Service bulletin: POWER TRAIN. The Customer May Complain About a Popping Noise, Grinding Noise, or an Intermittent No Reverse or Forward Transmission Engagement. The Tech May Find Damaged and/or Worn Transmission Output Shaft Splines \(850RE Transmission Only\)
- [S2621000003 REV.A](/bulletins/11030138.md), 2026-03-18, Service bulletin: POWER TRAIN. The vehicle will exhibit a service transmission/check engine warning indicator for the following transmission models: 845RE, 8HP45, 850RE, 8HP50, 8HP70, 8HP75, 8HP75\-PHEV, 8HP75\-LCV, 8HP90, 8HP95. Transmissions may exhibit the following diagnostic codes: P07E4, P1DB2, P0716, P1B14, P0733, P1D90, P1DB7, P1B13.
- [99500](/bulletins/11005356.md), 2024-07-31, Other: POWER TRAIN. CARRIER – PLANETARY \& SHAFT KIT \- OUTPUT
- [9100344](/bulletins/11000795.md), 2024-06-04, Service bulletin: POWER TRAIN. "VALVE BODY \& CONTROL UNIT Transmission Ensure clutch pressure check has been completed and documented prior to valve body replacement."
- [S2221000003](/bulletins/10248562.md), 2024-01-08, Service bulletin: POWER TRAIN. 8\-Speed Transmission, Additional Transmission Fluid Leak Inspection/Repair Guidelines.
- [S2221000003](/bulletins/10244401.md), 2023-10-30, Service bulletin: POWER TRAIN. 8\-Speed Transmission, Additional Transmission Fluid Leak Inspection/Repair Guidelines.
- [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
- [S2221000003](/bulletins/10229513.md), 2023-01-09, Service bulletin: POWER TRAIN. 8\-Speed Transmission, Additional Transmission Fluid Leak Inspection/Repair Guidelines.
- [S2018000008](/bulletins/10223551.md), 2022-10-17, Service bulletin: POWER TRAIN; ELECTRICAL SYSTEM. Engine Surge Feel and/or Diagnostic Trouble Code P0299 ? Turbo Underboost Condition After Updating The Powertrain Control Module \(PCM\) Software. \(ETL, ETM, ETN Engines\)
- [S2208000073](/bulletins/10223097.md), 2022-10-17, Service bulletin: POWER TRAIN. No Start, After Flash And Or PCM Replace, DTC P0513 Invalid Skim Key Setting

JSON: [/v1/bulletins/11012184](/v1/bulletins/11012184)

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