Service bulletin 1806917

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)
Type	Service bulletin
NHTSA id	10224733
Published by NHTSA	2022-10-24
Manufacturer's number	1806917
Manufacturer's date	2017-08-09
NHTSA component	BACK OVER PREVENTION; EXTERIOR LIGHTING; FUEL SYSTEM, GASOLINE; ELECTRICAL SYSTEM

NHTSA's summary

Flash: Powertrain Diagnostic and System Enhancements This bulletin involves reprogramming the Powertrain Control Module (PCM) with thelatest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find the following DiagnosticTrouble Codes (DTCs) have been set:U1400-00 - Implausible TPS Signal Received P1D73 - AGS Performance -(Active Grill Shutter). P0171 - Fuel System 1/1 Lean. P0174 - Fuel System 2/1 Lean. The following Diagnostic Trouble Codes (DTCs) have been changed from a one trip fault to atwo trip fault:P0335 - Crankshaft Position Sensor Circuit. P0339 - Crankshaft Position Sensor Intermittent. P0340 - Camshaft Position Sensor Circuit - Bank 1 Sensor 1. P0344 - Camshaft Position Sensor Intermittent - Bank 1 Sensor 1. P0345 - Camshaft Position Sensor Circuit - Bank 2 Sensor 1. P0349 - Camshaft Position Sensor Intermittent - Bank 2 Sensor 1. P0365 - Camshaft Position Sensor Circuit - Bank 1 Sensor 2. P0369 - Camshaft Position Sensor Intermittent - Bank 1 Sensor 2. P0390 - Camshaft Position Sensor Circuit - Bank 2 Sensor 2. P0394 - Camshaft Position Sensor Intermittent - Bank 2 Sensor 2. The technician may also find the following DTC stored in the Anti-lock Brake System (ABS) Module memory:The following Diagnostic Trouble Code (DTC) is caused by a calibration in the PCM that is in conflict with the ABS Module programming. Thenew software flash will correct this issue.C121C-00 - Torque Request Signal Denied. This software release also includes:Improvement at lower ambient temperatures for Engine Stop/Start (ESS) Starts. Improvements to vehicle drivability during a cam sensor and/or crank sensor malfunction. Transmission quick learn. Engine enhancements.

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

Driver assistance, Electrical system, Fuel system, Lighting, Backup camera

Trouble codes named

C121C, P0171, P0174, P0335, P0339, P0340, P0344, P0345, P0349, P0365, P0369, P0390, P0394, P1D73, U1400

Vehicles listed
CHRYSLER PACIFICA	2017

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

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