Service bulletin 18-049-20

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	10176589
Published by NHTSA	2020-06-22
Manufacturer's number	18-049-20
Manufacturer's date	2020-05-27
NHTSA component	POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); EQUIPMENT; SERVICE BRAKES, HYDRAULIC; ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE

NHTSA's summary

Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following DTCs have been set:P06EF - Engine Restart Performance(3.0L and 3.6L Only). P0556 - Brake Booster Pressure Sensor Circuit Performance. P040B - Exhaust Gas Recirculation Temperature Sensor 1 Circuit Performance(3.6L Only). U1424 - Implausible Engine Torque Signal Received(2017 MY Only). P2681 - Engine Coolant Bypass Valve Control Circuit Open(3.6L Only). P2299 - Brake Pedal Position/Accelerator Pedal Position Incompatible. B23C3 - Stop/Start Disable Switch 1/2 Correlation(3.0L and 3.6L Only). The following DTCs have been changed from a one trip fault to a two trip fault for(3.0L and 3.6L Only):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. P0365 - Camshaft Position Sensor Circuit - Bank 1 Sensor 2. P0369 - Camshaft Position Sensor Intermittent - Bank 1 Sensor 2. P0345 - Camshaft Position Sensor Circuit - Bank 2 Sensor 1. P0349 - Camshaft Position Sensor Intermittent - Bank 2 Sensor 1. P0390 - Camshaft Position Sensor Circuit - Bank 2 Sensor 2. P0394 - Camshaft Position Sensor Intermittent - Bank 2 Sensor 2. In addition, customers may experience one or more of the following conditions:A shorter auxiliary battery life. An illuminated Automatic Oil Change Indication (AOCI) light(3.6L Only). Other enhancements included in this update:Improvements to vehicle drivability during a cam or crank sensor MIL condition(2017 MY Only). Improved knock sensor performance.

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

Brakes, Engine, Equipment and accessories, Fuel system, Transmission and driveline, Automatic transmission, Transmission control module

Trouble codes named

B23C3, P0335, P0339, P0340, P0344, P0345, P0349, P0365, P0369, P0390, P0394, P040B, P0556, P06EF, P2299, P2681, U1424

Vehicles listed
DODGE DURANGO	2016, 2017
JEEP GRAND CHEROKEE	2016, 2017

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

Recalls for the same vehicles and component
16V249000	2016-04-27. EXTERIOR LIGHTING:BRAKE LIGHTS:SWITCH; POWER TRAIN:AUTOMATIC TRANSMISSION:PARK/NEUTRAL START INTERLOCK SWITCH

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
S1709000010	2023-01-09. Service bulletin. Customer complaints may include abnormal engine noise, rough idle, lack of power, misfire. Upon investigation, it may be found that there is excessive camshaft lobe wear/lifter wear (roller failure) on one or more cam lobes and that camshaft/lifter replacement is necessary.
W41	2022-09-26. Service bulletin. Customer Satisfaction Notification W41 Reprogram Powertrain Control Module
S1925000008	2022-06-27. Service bulletin. Malfunction Indicator Lamp (MIL) Illumination. Diagnostic Trouble Codes (DTCs) P208B ? Reductant Pump 1 Control Performance, and/or P20E8 ? Reductant Pressure Too Low, Set.
9004509	2022-05-31. Service bulletin. Oil Filter If a Mopar Oil Filter is not available, use a filter that meets or exceeds USCAR36 specification and is compatible with semi and full synthetic oils. Recommended Brands: Wix, Purolator, and NapaGold
S2025000001 Rev.	2020-12-28. Service bulletin. (Rev. B) Malfunction Indicator Lamp Illumination (MIL). Diagnostic Trouble Code (DTC) P203E ? Reductant Level Sensor 1 Circuit Intermittent-Erratic Set.
S1925000008 Rev.	2020-12-21. Service bulletin. (Rev. B) Malfunction Indicator Lamp (MIL) Illumination. Diagnostic Trouble Codes (DTCs) P20E8 ? Reductant Pressure Too Low and/or P208B ? Reductant Pump 1 Control Performance Set.
S2025000001 Rev.	2020-12-21. Service bulletin. (Rev. B) Malfunction Indicator Lamp Illumination (MIL). Diagnostic Trouble Code (DTC) P203E ? Reductant Level Sensor 1 Circuit Intermittent-Erratic Set.
W41 Combo	2020-08-24. Service bulletin. Customer Satisfaction Notification W41 Reprogram Powertrain Control Module
9003669	2018-06-11. Service bulletin. Auto Trans Rotary Electronic Shifter The rotary shifter is designed to actuate a motor within the device whenever the driver places their foot on the brake, with the car in Park (or Neutral). This generates a noise with each brake press/release. Therefore, even after replacing the shifter for a noise complaint, the replacementpart will also have a characteristic noise generated whenever the driver steps on the brake. Before performing a repair procedure for a noise complaint, please perform a subjective analysis of the noise coming from the rotary shifter. If the shifter noise is deemed abnormal sound (has an uncharacteristic buzz or grind), please proceed with normal replacement procedure. If so equipped, record the sound with a handheld microphone, or cell phone, and if noise is above 54dB @ 30cm away from the knob, please proceed with normal replacement procedure. For any further questions, please contact Theodore Kahiya at cell (519) 300-2443.
18-078-16 REV. A	2018-05-14. Service bulletin. Engine Oil Viscosity Upgrade And Flash Enhancements This bulletin involves reprogramming the Powertrain Control Module (PCM) and the Transmission Control Module (TCM). It also involves changing the engine oil with new 5W40 engine oil and applying a sticker to the engine oil filler cap. An addendum card will need to be added in the owner's manual. The following powertrain system improvements/enhancements are included in this software release: · Fan calibration. · Transmission calibration. · Revised oil change algorithm.