U0121 · Herstellerinformationen

CADILLAC, CHEVROLET, GMC · 2018-06-12

This Preliminary Information communication provides information to the technician about vehicle with Service ABS and/or Traction control lights/message on, Service Power Steering System, Service Suspension System, and or Loss of communication with EBCM, SWPS, PSCM, and/or SCM. Technician may find Diagnostic Trouble Codes U0077, U0121, U0126, U0131, U0139, U0401, U0415, and/or U0428. Technician should remove the driver and passenger sill plate to gain access to the wire harness. If any open, damaged, or corroded wires should be repaired.

BUICK, CADILLAC, CHEVROLET, GMC · 2017-11-20

This Preliminary information communicates a false setting of DTCU0121 in the FVCM due to a FVCM software anomaly. Code U0121 will set and be moved to history in the FVCM with each ignition cycle.

CADILLAC, CHEVROLET, GMC · 2017-04-11

This Preliminary Information communication provides information to the technician about vehicle with Service ABS and/or Traction control lights/message on, Service Power Steering System, Service Suspension System, and or Loss of communication with EBCM, SWPS, PSCM, and/or SCM. Technician may find Diagnostic Trouble Codes U0077, U0121, U0126, U0131, U0139, U0401, U0415, and/or U0428. Technician should remove the driver and passenger sill plate to gain access to the wire harness. If any open, damaged, or corroded wires should be repaired.

CADILLAC, CHEVROLET, GMC · 2017-02-22

This informational bulletin explains DTC U0121 sets due to a software anomaly and does not turn the MIL on or change performance of the vehicle.

CADILLAC, CHEVROLET, GMC · 2017-01-27

This Preliminary Information communication provides information to the technician about vehicles that have a reduced or loss of power steering assist, steering wheel jerks or kicks back when turning, Service Stabilitrak message with warning chime, engine stall, Instrument Panel Cluster going blank or inoperative, radio/Integrated Center Stack going blank, Heater-Vent-Air Conditioning going blank, hood ajar message and/or dome lamps flash when shifting into reverse, alarm sounds when locking doors or door locks cycling, and or wipers continue to run for a short time after turning off and then stop/park in the incorrect location. Technician may find Diagnostic Trouble Codes U0073, U0078, U0029, U0028, U0415, U0140, U0126, U0121, U0101, U0100, C0544, C0710, U1510, B127B, B2605, B3600, C0800,…

CADILLAC, GMC · 2016-11-18

This informational bulletin explains DTC U0121 sets due to a software anomaly and does not turn the MIL on or change performance of the vehicle.

CADILLAC, CHEVROLET, GMC · 2016-08-17

THIS PRELIMINARY INFORMATION COMMUNICATION PROVIDES INFORMATION TO THE TECHNICIAN FOR A REDUCED POWER MESSAGE, STEERING ASSIST, ENGINE STALL OR THE INSTRUMENT PANEL, RADIO, AND OR HEATER-VENT-AIR CONDITIONING GO BLANK WITH MULTIPLE DIAGNOSTIC TROUBLE CODES. IF ANY OF THE FOLLOWING DIAGNOSTIC TROUBLE CODES U0073, U0078, U0029, U0028, U0415, U0140, U0126, U0121, U0101, U0100, C0544, U1510, U0073, B127B, B2605, B3600,C0800, U0428, AND U0452 SET IN THE VEHICLE. CHECK THE BODY CONTROL MODULE GROUND AT THE G218 LOCATION. THE FRONT DASH INSULATOR MAT MAY BE TRAPPED BETWEEN THE GROUND EYELET AND THE BODY STUD. REMOVE THE ROUND NUT AND EYELET AND CUT THE FRONT DASH INSULATOR MAT AWAY FROM THE GROUND STUD SO IT NO LONGER INTERFERES WITH THE GROUND STUD AND REINSTALL THE EYELET AND GROUND NUT.…

CADILLAC · 2016-06-01

THIS TECHNICAL BULLETIN PROVIDES INFORMATION TO IGNORE FRONT VIEW CAMERA MODULE DTC U0121 SET IN HISTORY.

CHEVROLET, GMC · 2016-03-15

This Preliminary Information communication provides information to the technician that vehicles may have an Antilock Braking System or Malfunction Indicator Lamp illuminated. Also Low Brake Fluid lamp on with the master cylinder fluid level is full or a Service Trailer Brake message on the Driver Information Center. Technician may find codes C0035, C0040, C0045, C0050, C0055, C0267, U0121, U0415 or U0420. Technician will need to inspect the Electronic Brake Control Module connector for water intrusion or corrosion on the terminals. If either is found, replace the EBCM and replace the affected terminals. Also remove the tape from the conduit leading to G400 between the main harness and the ground lug.

CADILLAC, CHEVROLET, GMC · 2015-11-12

This Preliminary Information communication provides information to the technician for a reduced power message, steering assist, engine stall or the instrument panel, radio, and or Heater-Vent-Air Conditioning go blank with multiple diagnostic trouble codes. If any of the following diagnostic trouble codes U0073, U0078, U0029, U0028, U0415, U0140, U0126, U0121, U0101, U0100, C0544, U1510, U0073, B127B, B2605, B3600,C0800, U0428, and U0452 set in the vehicle. Check the body control module ground at the G218 location. The front dash insulator mat may be trapped between the ground eyelet and the body stud. Remove the round nut and eyelet and cut the front dash insulator mat away from the ground stud so it no longer interferes with the ground stud and reinstall the eyelet and ground nut.

CHEVROLET, GMC · 2015-09-21

This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp, service Antilock Braking System, Service Stabilitrak, Service All Wheel Drive, Service Suspension Control, or Hard Steering. Technician may find the following Diagnostic Trouble Codes stored C0196, C0186, C0287, C0710, C0045, C0050, C0800, U0077, U0074, U0125, U0126, U0100, U0101, U0121, U0415, U0432, U0121, and or U0140. Technician should inspect X411 connector for damage or corrosion. Technician will replace any terminals with damage or corrosion.

CADILLAC, CHEVROLET, GMC · 2015-09-08

This Preliminary Information communication provides information to the technician about vehicle with Service ABS and/or Traction control lights/message on, Service Power Steering System, Service Suspension System, and or Loss of communication with EBCM, SWPS, PSCM, and/or SCM. Technician may find Diagnostic Trouble Codes U0077, U0121, U0126, U0131, U0139, U0401, U0415, and/or U0428. Technician should remove the driver and passenger sill plate to gain access to the wire harness. If any open, damaged, or corroded wires should be repaired.

CADILLAC, CHEVROLET, GMC, HUMMER · 2015-06-25

This technical bulletin provides repair information to correct customer concerns of loss of high speed GMLAN communications, intermittent no crank, IP gauge fluctuation, intermittent door lock cycling /chime operation, various IP warning lamps illuminated, transmission may not shift, communication DTCs U0073, U0100, U0101, U0102, U0109, U0121 or U0140 set.

BUICK, CHEVROLET · 2015-06-22

This Preliminary Information communication provides information to the technician about vehicles that may have a Diagnostic Trouble Code U0121 in the Multi-axis Acceleration Sensor Module in history. This is a characteristic of normal operation do not replace any components for this concern.

CHEVROLET, GMC · 2015-06-01

This Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp, service Antilock Braking System, Service Stabilitrak, Service All Wheel Drive, Service Suspension Control, or Hard Steering. Technician may find the following Diagnostic Trouble Codes stored C0196, C0186, C0287, C0710, C0045, C0050, C0800, U0077, U0074, U0125, U0126, U0100, U0101, U0121, U0415, U0432, U0121, and or U0140. Technician should inspect X411 connector for damage or corrosion. Technician will replace any terminals with damage or corrosion.

CADILLAC · 2015-05-13

This Preliminary Information communication provides information to the technician about vehicles with the Service Engine Soon light is on, Reduced engine power message, no crank, multiple warning lights on, transmission shifts hard, or the door locks cycle while driving. The Transmission Control Module or Engine Control Module may not communicate. With Diagnostic Trouble Codes C0242, C0561, P0575, P0615, P0700, P0856, P1629, P2544, U0073, U0074, U0100, U0109, U0121, U0140, U2100, U2105, and / or U2106 stored. The technician is to inspect the transmission X1 connector terminals for loose or poor fit. Disconnect the X1 connector and carefully tug on each wire to insure pins are fully seated. A side load on the wires may also cause a false positive lock. Technician is to repair the…

CADILLAC, CHEVROLET, GMC · 2015-05-04

This Preliminary Information communication provides information to the technician for a reduced power message, steering assist, engine stall or the instrument panel, radio, and or Heater-Vent-Air Conditioning go blank with multiple diagnostic trouble codes. If any of the following diagnostic trouble codes U0073, U0078, U0029, U0028, U0415, U0140, U0126, U0121, U0101, U0100, C0544, U1510, U0073, B127B, B2605, B3600,C0800, U0428, and U0452 set in the vehicle. Check the body control module ground at the G218 location. The front dash insulator mat may be trapped between the ground eyelet and the body stud. Remove the round nut and eyelet and cut the front dash insulator mat away from the ground stud so it no longer interferes with the ground stud and reinstall the eyelet and ground nut.

CHEVROLET, GMC · 2015-05-01

This Preliminary Information communication provides information to the technician for vehicles with a malfunction indicator lamp on, service stabilitrak, power steering or vehicle soon message displayed on the drivers information center. The technician may find the following diagnostic trouble codes U0073, U0100, U0101, U0121 U0140 C0045, C0050 in the body control module, electronic brake control module, engine control module, or the transmission control module. There may be multiple loss of communication codes current or history for high speed General Motors Local Area Network. Inspect the connections at connector X411 for corrosion due to the location of the connector under the vehicle by the rear wheel.

AUDI · 2014-03-31

Supersedes Technical Service Bulletin Group 97 number 14-41 dated March 18, 2014. The MIL is on. Vehicle will not start. DTC P068A00 is stored in the engine control module (ECM), J623 (address word 01). Numerous unrelated DTCs are also stored in the system, including: P056200, P057100, P068700, P068A00, P162400, P190C00, U010000, U010100, U012100, U014600, U015500, U021200, U101100, U102600, U111100, U111300, U140000, VAG00003, VAG00185, VAG00263, VAG00317, VAG00384, VAG00446, VAG00456, VAG00457, VAG00466, VAG00473, VAG00532, VAG00565, VAG00591, VAG00714, VAG00819, VAG00955, VAG01217, VAG01299, VAG01314, VAG01315, VAG01317, VAG01320, VAG01330, VAG01331, VAG01332, VAG01334, VAG01333, VAG01336, VAG01705, VAG01964, VAG02067, VAG02072, VAG02095, VAG02103, VAG02203, VAG02214, VAG02635,…

CADILLAC · 2014-01-01

DTC U0121 Falsely Set Condition/Concern Technicians may find DTC U0121 stored in history with no other symptoms. This condition may be caused by a software anomaly.

BUICK, CHEVROLET · 2013-11-15

This Preliminary Information communication provides information to the technician about vehicles that may have a Diagnostic Trouble Code U0121 in the Multi-axis Acceleration Sensor Module in history. This is a characteristic of normal operation do not replace any components for this concern.

BUICK, CHEVROLET · 2013-11-01

BUICK/CHEVROLET: THE MULTI-AXIS ACCELERATION SENSOR MODULE HAS DIAGNOSTIC TROUBLE CODE (DTC) U0121 (LOSS OF COMMUNICATION WITH EBCM) SET, WHEN PERFORMING DTC CHECK USING SCAN TOOL BY TECHNICIAN AND COMPONENTS OF THIS CONDITION NEED NOT BE REPLACED. MODEL 2013-2013 MALIBU, REGAL, LACROSSE. *PE

CHEVROLET · 2013-08-22

This Preliminary Information communication provides information to the technician about vehicles that have multiple Instrument Panel Cluster warning indicators on and/or warning messages being displayed on the Driver Information Center. Technician may find Diagnostic Trouble Codes U0073, U0077, U0121, U0126, U0151, U0155, U0164, U0186, U0415, U0422, and U0428. Technician will need to inspect for a pinch DLC branch in the Instrument Panel harness behind the Instrument Panel Carrier.

CADILLAC · 2013-01-03

This Preliminary Information communication provides information to the technician about vehicles with the Service Engine Soon light is on, Reduced engine power message, no crank, multiple warning lights on, transmission shifts hard, or the door locks cycle while driving. The Transmission Control Module or Engine Control Module may not communicate. With Diagnostic Trouble Codes C0242, C0561, P0575, P0615, P0700, P0856, P1629, P2544, U0073, U0074, U0100, U0109, U0121, U0140, U2100, U2105, and / or U2106 stored. The technician is to inspect the transmission X1 connector terminals for loose or poor fit. Disconnect the X1 connector and carefully tug on each wire to insure pins are fully seated. A side load on the wires may also cause a false positive lock. Technician is to repair the…

CADILLAC · 2012-11-28

This Preliminary Information communication provides information to the technician about vehicles with the Service Engine Soon light is on, Reduced engine power message, no crank, multiple warning lights on, transmission shifts hard, or the door locks cycle while driving. The Transmission Control Module or Engine Control Module may not communicate. With Diagnostic Trouble Codes C0242, C0561, P0575, P0615, P0700, P0856, P1629, P2544, U0073, U0074, U0100, U0109, U0121, U0140, U2100, U2105, and / or U2106 stored. The technician is to inspect the transmission X1 connector terminals for loose or poor fit. Disconnect the X1 connector and carefully tug on each wire to insure pins are fully seated. A side load on the wires may also cause a false positive lock. Technician is to repair the…

CADILLAC, CHEVROLET, GMC, HUMMER · 2012-03-01

GM: LOSS OF HIGH SPEED GMLAN COMMUNICATIONS, INTERMITTENT NO CRANK, IP GAGE FLUCTUATION, INTERMITTENT DOOR LOOK CYCLING, INTERMITTENT CHIME OPERATION, VARIOUS IP WARNING LAMPS ILLUMINATED, TRANSMISSION MAY NOT SHIFT, COMMUNICATION DTCS U0073, U0100, U0101, U0102 U0121 OR U0140 SET (REPAIR TERMINALS IN TRANSMISSION HARNESS CONNECTOR, REPAIR OPEN OR SHORTED GM HIGH SPEED LAN CIRCUITS, OPEN OR SHORTED DATA LINK RESISTOR, CORROSION OR POOR CONNECTIONS IN VARIOUS CONTROL MODULE CONNECTORS). *JS

CADILLAC, CHEVROLET, GMC · 2012-02-01

GMC: UNABLE TO COMMUNICATE WITH THE EBCM DTC U0121. *NJ VEHICLES EQUIPPED WITH JL4. UPDATED 9/30/08. *PE UPDATED 6/27/11. *PE UPDATED 4/6/12. *PE

CADILLAC, CHEVROLET, GMC · 2010-06-01

LOSS OF HIGH SPEED GMLAN COMMUNICATIONS, INTERMITTENT NO CRANK, IPC GAUGE FLUCTUATION, INTERMITTENT DOOR LOCK CYCLING, TRANSMISSION MAY NOT SHIFT, DTCS U0073, U0100, U0101, U0102, U0121, U0140 SET (REPAIR BACKED OUT TERMINAL IN TRANSMISSION HARNESS CONNECTOR). VEHICLES WITH 6 SPEED 6L80 (RPO MYC), 6L90 (RPO MYD) OR HYBRID TWO MODE 2M70 AUTOMATIC. INCLUDING 2008 TAHOE AND YUKON HYBRID MODELS. *PE UPDATED 3/28/11. INCLUDING SIERRA, SILVERADO AND ESCALADE HYBRIDS. *PE

CHEVROLET, PONTIAC, SATURN · 2008-11-01

GENERAL MOTORS: ABS AND STABILITRAK LIGHTS ON DTC(S) U0121, C0550, C0186, C0196, C0710, C0252. THIS CONCERN CAN BE CAUSED BY WIRE HARNESS GOING TO EBCM, CHAFFING ON TRANSMISSION MOUNT OR METAL BRACKET. *PE

HUMMER · 2008-07-01

GMC: LOSS OF HIGH SPEED GMLAN COMMUNICATIONS, IPC WARNING LIGHTS ON, DIC MESSAGES, NO CRANK, IPC GAUGE DROP OR FLUCTUATION, DOOR LOCK CYCLING , HARD TRANSMISSION SHIFT, DTCS U0073, U0100, U0101, U0102, U0109, U0121, U0132, U0140, U2100 SET (INSPECT IDENTIFIED ELECTRICAL CONNECTIONS AND WIRING FOR FAULTS). *PE