# Service bulletin 1807120

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: 10221892
- Published by NHTSA: 2022\-09\-26
- Manufacturer's number: 1807120
- Manufacturer's date: 2020\-08\-28
- NHTSA component: ELECTRICAL SYSTEM; POWER TRAIN

## NHTSA's summary

Flash: Powertrain Control Module \(PCM\) Updates This bulletin involves reprogramming the PCM with updated software. Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code \(DTC\) set in the PCM memory:U1424\-00 \- Implausible Engine Torque Signal Received. In addition, the customer may notice:An unpleasant odor in the vehicle under certain extreme ambient conditions\(LD vehicles with Sales Codes EZH with Police Group \(Sales Code AHB\) or Special Service Group \(Sales Code AHV\)\). The following software enhancements are also available:Reverse gear lock\-out change from 16 kph \(10 mph\) to 4.8 kph \(3 mph\)\(Sales Code EZC with DEC\). Change to purge vapor control calibration\(Sales Code EZH with DGJ\). Oxygen sensor \(O2\) feedback control changes to improve 3rd gear tip in oscillation at high load\(Sales Code EZH with DFK\). Calibration update to allow the throttle body to be cycled while the engine is off, for diagnostic purposes. Improved transmission shifting during a limp mode.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10221892-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10221892-9999.pdf)

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

## Components

Electrical system, Transmission and driveline

## Trouble codes named

U1424

## Vehicles listed

- 2017 CHRYSLER 300
- 2017 DODGE CHALLENGER
- 2017 DODGE CHARGER

## Recalls for the same vehicles and component

- [18V332000](/recalls/nhtsa/18V332000.md), 2018-05-17: ELECTRICAL SYSTEM:SOFTWARE; VEHICLE SPEED CONTROL:CRUISE CONTROL; ELECTRICAL SYSTEM:WIRING
- [2018219](/recalls/tc/2018219.md), 2018-05-01: Powertrain
- [18V281000](/recalls/nhtsa/18V281000.md), 2018-05-01: POWER TRAIN:DRIVELINE:DRIVESHAFT
- [2017335](/recalls/tc/2017335.md), 2017-07-07: Powertrain
- [17V431000](/recalls/nhtsa/17V431000.md), 2017-07-07: POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\)
- [2017081](/recalls/tc/2017081.md), 2017-02-15: Powertrain
- [17V097000](/recalls/nhtsa/17V097000.md), 2017-02-14: POWER TRAIN:AXLE ASSEMBLY:AXLE SHAFT

## Other bulletins for the same vehicles and component

- [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.
- [S2608000010](/bulletins/11030042.md), 2026-03-13, Service bulletin: ELECTRICAL SYSTEM. Active Diagnostic Trouble Code \(DTC\) B1A10\-00, B1A11\-00, B1A12\- 00, B1A13\-00\-, B1A14\-00, B1A15\-00, B1A16\-00, and B1A17\-00 in The Radio Frequency Hub \(RFH\)
- [9100735](/bulletins/11026651.md), 2025-12-17, Service bulletin: ELECTRICAL SYSTEM. Verify "Z" part number availability. Order a "Z" part number for all Exchange Orders: Warranty, Mopar, Customer pay and Service contract. Order"68" part number for New unsold units only
- [S2208000138 REV.B](/bulletins/11020600.md), 2025-07-09, Service bulletin: ELECTRICAL SYSTEM. Decreased Remote Start And RKE Range. Tire Pressure Sensors Values Are Not Displayed
- [104523](/bulletins/11017235.md), 2025-04-25, Service bulletin: STRUCTURE:BODY; ELECTRICAL SYSTEM. SWITCH AND BEZEL \- FRONT DOOR
- [103261](/bulletins/11014855.md), 2025-03-04, Service bulletin: STRUCTURE:BODY; ELECTRICAL SYSTEM. SWITCH AND BEZEL \- FRONT DOOR
- [S1408000384](/bulletins/10251783.md), 2024-03-18, Service bulletin: ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Start Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor \(IBS\) State of Charge \(SOC\) Inaccurate, Battery Charging Message, Presence of IBS related Diagnostic Trouble Codes \(DTCs\), or Battery Warning Lamp On
- [9100226](/bulletins/10248509.md), 2024-01-08, Service bulletin: ELECTRICAL SYSTEM. Connector kit Before ordering this connector repair kit 68018957A$, check it in the Mopar Connector Repair Kit Website to confirm part number and applicability. There is an error with the wiring diagrams in Service Library that is causing the incorrect repair kit part number to populate. Please use the Mopar Connector Repair Kit Website until this issue is resolved.
- [9100226](/bulletins/10244348.md), 2023-10-30, Service bulletin: ELECTRICAL SYSTEM:WIRING. Connector kit Before ordering this connector repair kit 68018957A$, check it in the Mopar Connector Repair Kit Website to confirm part number and applicability. There is an error with the wiring diagrams in Service Library that is causing the incorrect repair kit part number to populate. Please use the Mopar Connector Repair Kit Website until this issue is resolved.
- [0813523](/bulletins/10239985.md), 2023-07-31, Service bulletin: UNKNOWN OR OTHER; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY. UCQ UAQ UAS Radio Enhancements Software Updated to 16.2 Customers may experience one or more of the following: ? Vehicle has lost connectivity after radio swap or battery disconnect. This bulletin involves inspecting and if required, updating the radio to software: 16.12.

JSON: [/v1/bulletins/10221892](/v1/bulletins/10221892)

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