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Service bulletins for the 2017 Chrysler 300

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.

202 on file from NHTSA, as of 2026-10-19.

About U1424 on the 2017 Chrysler 300: what the code means, and the bulletins and recalls about the same components.

By type

By component

By trouble code

Only bulletins with trouble code: U1424 are shown. Show all

Bulletins, newest first
21016172022-10-24. Service bulletin. EXTERIOR LIGHTING; ELECTRICAL SYSTEM; POWER TRAIN. Flash: Transmission Diagnostic and Shift Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one of the following Diagnostic Trouble Codes (DTCs) have been set: U1424-00 - Implausible Engine Torque Signal Received. P1DB8-00 - Unintended Torque Applied While in Neutral. Customers may describe the following: Poor shift quality on coast down shifts (bumps) (LX and LD Only). In addition, the following software enhancement is available: Improved transmission shifting during a limp mode.
18071202022-09-26. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. 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.
21-010-172022-08-08. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Flash: Transmission Diagnostic And Shift Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Codes (DTCs) set in the TCM memory: P1DB8-00 - Unintended Torque Applied While In Neutral. U1424-00 - Implausible Engine Torque Signal Received.In addition to the above DTCs, this software release also includes: Improved transmission shifting during a limp mode.
18-027-172022-08-08. Service bulletin. POWER TRAIN; BACK OVER PREVENTION. Flash: Powertrain Diagnostic And System Enhancements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. A small number of 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 to the above DTC, this software release also includes: Update Throttle Position Sensor (TPS) relation to the Accelerator Pedal Position (APP) sensor to fix ?Electronic Throttle Control (ETC) pedal follower test? within wiTECH which is not functional on some vehicles. Normal engine running throttle control is not impacted by this update. Improved transmission shifting during a limp mode.
18-071-202020-09-28. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT; POWER TRAIN. 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.
21-010-172018-06-11. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN. Flash: Transmission Diagnostic And Shift Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Codes (DTCs) set in the TCM memory: P1DB8-00 - Unintended Torque Applied While In Neutral. U1424-00 - Implausible Engine Torque Signal Received.In addition to the above DTCs, this software release also includes: Improved transmission shifting during a limp mode.
18-027-172018-06-11. Service bulletin. POWER TRAIN. Flash: Powertrain Diagnostic And System Enhancements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. A small number of 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 to the above DTC, this software release also includes: Update Throttle Position Sensor (TPS) relation to the Accelerator Pedal Position (APP) sensor to fix ?Electronic Throttle Control (ETC) pedal follower test? within wiTECH which is not functional on some vehicles. Normal engine running throttle control is not impacted by this update. Improved transmission shifting during a limp mode.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.