WenmarOpen by Wenmar Pro

Service bulletin 1800906

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 id10019630
Published by NHTSA2006-04-12
Manufacturer's number1800906
Manufacturer's date2006-07-14
Replaces1802306
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

ENHANCED TORQUE CONVERTER AND GLOW PLUG OPERATION OR BRAKE SWITCH DTC P0504. *TT

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Electrical system

Trouble codes named

P0504

Vehicles listed
JEEP GRAND CHEROKEE2005, 2006
JEEP LIBERTY2005, 2006

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

Recalls for the same vehicles and component
20151632015-04-16. Electrical
20143122014-07-23. Electrical
14V4380002014-07-21. ELECTRICAL SYSTEM:IGNITION:SWITCH
13V1750002013-05-07. ELECTRICAL SYSTEM; POWER TRAIN:TRANSFER CASE (4-WHEEL DRIVE)
07V0890002007-03-09. ELECTRICAL SYSTEM
06V0360002006-02-09. ELECTRICAL SYSTEM:WIRING:FRONT UNDERHOOD

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
S22080001362023-01-17. Service bulletin. Security Module Lock Out After Entering the PIN to Unlock The Wireless Control Module (WCM)
90042752023-01-09. Service bulletin. KEY, Master If replacing the key/FOBIK on a WJ, KJ, TJ, or PT Cruiser, use the "AC" NIC level part number. The "AB" NIC level will not program to these platforms. For all other platforms, if the "AB" NIC level will not program to the vehicle, use the "AC" NIC level part and submit a part warranty.
P732023-01-09. Service bulletin. Customer Satisfaction Notification P73 Reprogram Final Drive Control Module The Final Drive Control Module (FDCM) software on about 295,600 of the above vehicles may cause the ?Service 4WD? light to come on and an inability to switch 4WD mode when trying to shift out of the current selected mode. The Final Drive Control Module (FDCM) must be reprogrammed with new software.
S22080001362022-10-17. Service bulletin. Security Module Lock Out After Entering the PIN to Unlock The Wireless Control Module (WCM)
90034832022-10-17. Service bulletin. Exterior Mirror The latest version of these exterior mirrors have had their glass removed to be serviced separatly. To install, connect the electrial connector (if equipped) and snap the glass onto the mirror housing.
90042752022-09-26. Service bulletin. KEY, Master If replacing the key/FOBIK on a WJ, KJ, TJ, or PT Cruiser, use the "AC" NIC level part number. The "AB" NIC level will not program to these platforms. For all other platforms, if the "AB" NIC level will not program to the vehicle, use the "AC" NIC level part and submit a part warranty.
18-042-142022-08-15. Service bulletin. Generic Powertrain Control Module (PCM) Procedure This bulletin involves programming a generic PCM with software.
21-022-14 REV. A2022-08-15. Service bulletin. 4WD Lamp Illuminated and Diagnostic Trouble Code C140F Active in Final Drive Control Modules (FDCM) Memory This bulletin involves verifying FDCM software level and then flash reprogramming of the FDCM with new software. Customers may indicate that the ?Service 4WD? indicator in the instrument cluster is illuminated. They may also indicate that the transfer case will not shift from 4WD High, 4WD Low, and/or Neutral once the lamp is illuminated. Further investigation identifies that a Diagnostic Trouble Code C140F is stored or active in the Final Drive Control Modules (FDCM) Memory
90017452022-07-25. Service bulletin. 05174039A$, 05072384A$, 05072138A$ - A/C Pressure Transducer For vehicles calling out AC Pressure Transducer Kit 05072138AA as a service part but built with different mating wiring connector (round) - also order connector repair kit 05019958AA (square).~ 2007MY RAM Trucks equipped with 6.7L Cummins turbo diesel engine only: If the A/C pressure transducer requires replacement, use part number 05072138AA that has a rectangular shaped electrical connector. If the engine wiring harness has a circular wiring connector, use jumper harness 68028774AA to change it to a rectangular connector.~ 6.7L RAM trucks built before10/17/2006 has pressures transducers (p/n 05191766AA) with a round connector that should have been changed per RRT 06- 068 to a rectangular transducer.~ 2001-2008 KJ, K1, ND.~
N230508132022-07-18. Service bulletin. New Safety Recall Advanced Communication ? N23050813 Chrysler Group LLC (Chrysler) announced a safety recall on certain 2005 - 2010 model year (WK) Jeep Grand Cherokee and (XK) Jeep Commander vehicles equipped with a Quadra-Drive II or Quadra-Trac II four wheel drive system. Some of the above vehicles may experience a transfer case actuator encoder electrical failure that results in unintentional transfer case shifting into or through the neutral position. NOTE: These vehicles are equipped with a NV245 transfer case that is part of the automatic four wheel drive system. The transfer case shifts into and out of four wheel drive modes and ranges automatically or based on driver inputs. Chrysler will conduct a voluntary safety recall on all affected vehicles to reprogram the Final Drive Controller Module (FDCM) with new software. The four wheel drive system will then be function tested. Vehicles found with an inoperative transfer case actuator will also have the actuator replaced. Dealers will be notified of the launch of this safety recall by way of established methods used in the past. We ask that you please take the time to ensure that your personnel are aware of this communication and are prepared to execute a customer friendly process for inquiries on involved vehicles.