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Service bulletin 1805716

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10228115
Published by NHTSA2022-12-19
Manufacturer's number1805716
Manufacturer's date2016-05-11
NHTSA componentELECTRICAL SYSTEM; POWER TRAIN; ENGINE AND ENGINE COOLING

NHTSA's summary

Flash: 3.6L 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 and/or one of the following conditions. Upon further investigation, a technician may find the following Diagnostic Trouble Code (DTC) stored in the Anti-lock Brake System (ABS) Module memory: NOTE: The Diagnostic Trouble Code (DTC) is caused by a calibration in the PCM that is in conflict with the ABS Module programming. The new software flash will correct this issue. · C121C-00 - Torque Request Signal Denied.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Engine, Transmission and driveline

Trouble codes named

C121C

Vehicles listed
CHRYSLER PACIFICA2017

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20230082023-01-18. Electrical
23V0100002023-01-17. ELECTRICAL SYSTEM:WIRING:CONNECTORS/PLUGS/RECEPTACLES; HYBRID PROPULSION SYSTEM: INVERTER
20202542020-06-10. Electrical
20V3340002020-06-09. ELECTRICAL SYSTEM:WIRING:INTERIOR/UNDER DASH; ELECTRICAL SYSTEM:12V/24V/48V BATTERY:CABLES
19V3480002019-05-09. ELECTRICAL SYSTEM:12V/24V/48V BATTERY
20185742018-10-19. Engine
18V7400002018-10-19. HYBRID PROPULSION SYSTEM; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
18V5240002018-08-09. ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD
20183232018-06-15. Powertrain
18V3950002018-06-14. EQUIPMENT:ELECTRICAL:ANTI-THEFT DEVICES; ELECTRICAL SYSTEM:IGNITION:ANTI-THEFT:CONTROL MODULE

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
91009002026-09-17. Service bulletin. Passive Entry O/S Dr Handle Prior to replacing an inoperative passive entry door handle, perform Star Online S2623000040.
1132802026-07-18. Service bulletin. HOSE AND TUBE - EGR COOLANT
91008602026-07-18. Service bulletin. Passive Entry O/S Dr Handle Prior to replacing an inoperative passive entry door handle, perform Star Online S2623000040.
08-271-262026-07-18. Service bulletin. Battery Pack Control Module (BPCM) Update Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ● U0412-00 - Invalid Data Received From Battery Energy Control Module "A".
S26230000462026-07-02. Service bulletin. Calibration Requirements For The Power Sliding Door Module (PSDM).
S2623000041 REV.A2026-07-02. Service bulletin. Power Liftgate Intermittently Inoperative. Will Not Open/ Close. Liftgate/Hatch Ajar Message Displayed. Rev A
S1623000028 Rev. K2026-06-18. Service bulletin. Outside Power Fold Rearview Mirror Noise Or Loose At Pivot. Mirror Contacts Door Window Glass In The Folded Position.
91008352026-06-18. Service bulletin. Prior to replacing an inoperative passive entry door handle, perform Star Online S2623000040.
S26230000402026-06-16. Service bulletin. Passive Entry Exterior Door Handle Inoperative When Touched To Lock And Or Unlock.
S26230000412026-06-16. Service bulletin. Power Liftgate Intermittently Inoperative. Will Not Open/ Close. Liftgate/Hatch Ajar Message Displayed.