Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
CADILLAC, CHEVROLET, GMC
Reported code forms U0121
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…
BUICK, CADILLAC, CHEVROLET, GMC
Reported code forms U0121
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
Reported code forms U0121
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…
CADILLAC, CHEVROLET, GMC
Reported code forms U0121
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
Reported code forms U0121
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…
CADILLAC, GMC
Reported code forms U0121
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
Reported code forms U0121
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…
CADILLAC
Reported code forms U0121
THIS TECHNICAL BULLETIN PROVIDES INFORMATION TO IGNORE FRONT VIEW CAMERA MODULE DTC U0121 SET IN HISTORY.
CHEVROLET, GMC
Reported code forms U0121
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…
CADILLAC, CHEVROLET, GMC
Reported code forms U0121
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…
CHEVROLET, GMC
Reported code forms U0121
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…
CADILLAC, CHEVROLET, GMC
Reported code forms U0121
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…
CADILLAC, CHEVROLET, GMC, HUMMER
Reported code forms U0121
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,…
BUICK, CHEVROLET
Reported code forms U0121
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…
CHEVROLET, GMC
Reported code forms U0121
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…
CADILLAC
Reported code forms U0121
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…
CADILLAC, CHEVROLET, GMC
Reported code forms U0121
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…
CHEVROLET, GMC
Reported code forms U0121
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…
AUDI
Reported code forms U012100
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…
CADILLAC
Reported code forms U0121
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
Reported code forms U0121
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…
BUICK, CHEVROLET
Reported code forms U0121
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…
CHEVROLET
Reported code forms U0121
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…
CADILLAC
Reported code forms U0121
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…
CADILLAC
Reported code forms U0121
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…
CADILLAC, CHEVROLET, GMC, HUMMER
Reported code forms U0121
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,…
CADILLAC, CHEVROLET, GMC
Reported code forms U0121
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
Reported code forms U0121
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…
CHEVROLET, PONTIAC, SATURN
Reported code forms U0121
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
Reported code forms U0121
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,…