U0103

Lost Communication With Gear Shift Module

DTC U0103, sometimes indicated as U010300 is an OBD diagnostic trouble code indicating a generic fault with the vehicle user network.

  • U0103: Lost Communication With Gear Shift Module
  • U0103: Lost Communication With Gear Shift Control Module "A"
  • U0103: Data bus, gear shift module – no communication
  • U0103 00: Data bus, gear shift module - no communication

See Also: Related Error Codes
DTC Trouble Code Search
Bulletins

Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.

  • S2208000168 - ELECTRICAL SYSTEM
    RAM: Vehicle will not shift out of park, diagnostic trouble codes (dtcs) invalid data and loss of communications with the electronic shift module (esm) U11E3-00, U0103-00, U1267-00
  • 9003783 - POWER TRAIN:AUTOMATIC TRANSMISSION
    JEEP: Shifter - automatic transmission if a 2015 - 18my kl only is brought in with a ?Service shifter? Message on the cluster and/or the following dtcs are present indicating loss of communication with the shifter: U0103, U0103-87. Prior to b
  • TSB 21-2405 - ELECTRICAL SYSTEM
    FORD: Some 2021 mustang mach-e vehicles built on or before 09-sep-2021 may exhibit an illuminated powertrain malfunction indicator (wrench) lamp and/or display the message shift system fault  service required with dtc U0103:87 stored in the seco
  • SSM 49329 - ENGINE (PWS)
    LINCOLN: Some 2020-2021 aviator and explorer vehicles may experience an intermittent no crank, inoperative remote start, and/or an illuminated wrench light with diagnostic trouble codes (dtcs) P07E4, B135C and/or U0103. This may be due to a loose gr
  • 9003783 - POWER TRAIN:AUTOMATIC TRANSMISSION
    JEEP: Shifter - automatic transmission before this part is replaced for a service shifter message and lost communication dtc U0103, U0103-87 issues, please call bing guo on cell (248) 500-7355 with all associated dtcs and failure information.
Consumer Complaints for this DTC



2020 FORD ESCAPE with 84.0 miles

Vehicle purchased 5/12/20. On 5/22/20, at odo 84 miles, on startup, vehicle displayed powertrain fault - illuminates when a powertrain or awd fault has been detected. Contact your authorized dealer as soon as possible. Vehicle flat bed towed to sunstate Ford west colonial dr orlando fl (purchase dealership). Service team had vehicle 5 days. Cleared codes U0131, U0100, U0140, U0155, U0198, U0253, U0257, P0919, U0212, U023A, U0103, U0111, U0121, U013F, U0159, U0232, U0233, U0293, U0401, U0415, U0420, U0424, U0531, U0101, U0418, U0429, U0146. 4 mile test drive. 20 mile drive returned vehicle with no cause or correction. Only explained powertrain failure could not be replicated. Since return, rear automatic liftgate intermittent failure, back up camera failure, headliner drop at front passenger and driver door seal.
STRUCTURE:BODY, POWER TRAIN ELECTRICAL SYSTEM STRUCTURE:BODY ELECTRICAL SYSTEM POWER TRAIN



2013 VOLKSWAGEN EOS with 29500.0 miles

Tl* the contact owns a 2013 Volkswagen Eos. While driving at unknown speeds, the vehicle lost power and shifted into neutral. Also, the service vehicle warning indicator illuminated. The contact's diagnostic trouble code reader provided code: U0103. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted and referred the contact to the local dealer. The failure mileage was 29,500.
ENGINE,



2007 DODGE NITRO 4X2 with 220000. miles

The driver side break light and reverse light has had to be replaced too frequently. Now the gear shift - diag code U0103 seems to cause the loss of communication of the gear position. That only allows the vehicle to only travel about 20mph and approx 3000 rpm , which can be very dangerous if there is a unexpected slow down on the highway
ELECTRICAL SYSTEM, EXTERIOR LIGHTING



2007 JEEP GRAND CHEROKEE with 98000.0 miles

Multiple times while driving my vehicle has suddenly lost power. I will be going 70 mph or 15 trying to accelerate and then it stalls out and won't accelerate. I will pull off to the side of the road and turn my car off and then back on and it will correct itself most of the time. I took my vehicle to a transmission place and they didn't know what it was. The conducted a transmission flush and replaced some electrical wiring and it seemed to help for about 4 months. Now just last friday (20 april 2012), i was trying to accelerate after pulling out into traffic and almost got broadsided because the car just wouldn't accelerate past 2.5 rpms and 10 mph. Luckily the car heading straight for me slowed down and i was able to get out of the way for on coming 55 mph traffic. I looked on numerous websites and an ungodly amount of Jeep owners have reported this same issue. I took my vehicle to the Jeep dealer yesterday (23 april 2012) and they said they had to replace the electronic shifter module. I was getting codes U0404 and U0103. It cost $1051.50 to fix. I checked on-line after, and that is what everyone else said that the Jeep mechanics would recommend even though it would just break again 3 months later. One man even noted that the mechanic said that they have changed over 1,000 of those in his shop alone. I feel that this is a major safety issue and should be recalled! Jeep obviously knows this is going on.
ENGINE AND ENGINE COOLING,



2006 DODGE CHARGER with 86000.0 miles

Speedometer quit working, car jumps hard into reverse and drive, will not shift out of first gear, code U0100, U1120, U0121, U0103, replaced computer and had no change of condition, no transmission dipstick to check fluid, a must take to dealer item that is not sensible.
VEHICLE SPEED CONTROL, ENGINE SERVICE BRAKES



2005 JEEP GRAND CHEROKEE with 142000. miles

2005 Jeep Grand Cherokee laredo with 3.7 liter motor shows all four gears park neutral reverse and drive "prnd" active at the same time and the check engine obdii code U0103 (can bus communication lost with the shifter). This condition reoccurs every 1 to 7 days approximately. While in this mode the vehicle is in limp mode stuck in 2nd gear. I tried to drive it to the dealership twice with this condition on back roads but it will clear after driving for about 5 miles in limp mode. I had the vehicle towed to the Jeep dealership with this condition present. It cleared while they were trying to diagnose problem and they couldn't get it to repeat while driving it with my permission for three weeks. They were unable to diagnose the problem and no repairs were made. I got my vehicle back after three weeks at dealeship and problem reoccurred after two days of driving. Trying to drive this vehicle in limp mode is very dangerous as you cannot exceed about 30 miles per hour causing dangerous conditions to myself and other drivers on roads with speed limits higher than 30 mph. This is a serious safety issue and the dealership can't diagnose the problem. In the meantime i am stuck with a very unsafe vehicle
POWER TRAIN, ELECTRICAL SYSTEM

Previous Code: U0102 | Next Code: U0104