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Code u0100 - 2007 Jeep Compass Limited

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Trouble code P0700 & U0100


What make vehicle ? P0700 is a code for transmission problem . U0100 is a problem on the serial data bus or a module on the bus .

Apr 12, 2016 | Cars & Trucks

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Toyota codes u0100 and u0101


U0100 means lost of communication with ECM/PCM
U0101 means lost of communication with TCM

Feb 24, 2014 | 2007 Toyota Camry

1 Answer

Toyota vx 200series code u0100


that is a very serious comm problem (Im sad for you, scary code)
reset it and see if it comes back other sysptoms, low battery
just finished jumper cable jump starts, or other odd battery issues???
short answer: take it to Toyota.
long:
U1100 is seatbelt controller
U1110
Lost Communication with Clearance Sonar Module i cant find much on U0100, are you very sure that is it?
DTC U0100 Lost Communication with Engine Control Module (ECM)

1: check all fuses. using and ohm meter (restance low range) for 0 ohms.
2: check battery voltage running engine and not.
12.6v key off, 13.3 to 15v running, if not charge system failure.
3: pull battery minus lug for 1hr. and put back, keep in mind you can lose radio codes. or dead radio for lack of radio pw code.

4: re-seat all CAN buss modules in car, 1 by 1one battery minus pulled.
PCM, BCM , all off them. reseat means pull connector to it and put it back.
It might just be a random glitch, that all comms see, all the time on all networks. Unknown, glitch. (CRC failure)

Jan 31, 2014 | 2004 Toyota Land Cruiser

1 Answer

2006 VW Jetta code U0100


This problem is with ecu / ecm= engine control computer. These are a common and horrible problem on vw's, particularly on tdi's. The signs in a tdi are when car dash lights come on, but no glow plug light,trans gear lights flash, but car still tries to crank. And hopefully ecu has enough power to out out code u0100= no communication with ecu. Unfortunately the ecu will need to be replacd. The ecu is located under the hood, near and under the wipers. Used ecu with same codes run $50-200. New $1000. If get used one make sure has a return policy. codes must match production quarterly year.

Apr 14, 2013 | 2006 Volkswagen Jetta

1 Answer

No start and code u0100


That means that the computer on the car is not working because it cannot communicate with the controller for the transmission.

Feb 07, 2013 | 2006 Saturn ION

1 Answer

Im looking for the definition to code U0100.


U0100 - Lost Communication With Engine Control Module (ECM)

Jan 30, 2011 | Chevrolet Aveo Cars & Trucks

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