Code U1120 is a nonexclusive correspondence frameworks demonstrative difficulty code that shows that there’s a deficiency of correspondence the vehicle speed signal over the Controlled Region Organization (CAN) C transport from the Electronically monitored slowing mechanism Framework (ABS) Module.

At the point when the PCM doesn’t get a vehicle speed signal from the Non-freezing stopping device Framework Module over the CAN C transport, it enacts a blunder code.

U1120 implies the abs module has lost correspondence with speed sensors. You’ll require a scanner to monitor speed sensors. In the event that issue is in module you will not get correspondence with scanner. Follow your brake lines from ace chamber to ABS siphon/module, on in is a wired connector. Fix it and check for dampness or erosion. Get some dielectric gel and smear it great on all contacts. Also, plug back in and retest. Could require new module or speed sensor.

It has two in the transmission, and one on each wheel. I as of late placed in bigger tires, new edges, and the shop added a spacer. I changed the back brake cushions, and one of the front center course. None of those changes made the lights come on, they just did on an ordinary thruway outing to take care of the electric bill.

How to fix code U1120

Fixing Code U1120

The vehicle is overheating and I have changed the indoor regulator. Code P06b8 I connected the code peruser and it has given me the u1120 code


Normal foundations for this code include:

  • Correspondence Issues
  • Broken Regulator Region Organization (CAN) C Transport Regulator Circuit
  • Defective ABS Module


The symptoms of a U1120 code are:

  • Motor Light ON (or Administration Motor Before long Advance notice Light)


To analyze a U1120 DTC code, an expert would:

  • Check for correspondence issues between modules
  • Really take a look at battery voltage for legitimate levels
  • Check for correspondence issues between the PCM and ABS and VSS
  • Really take a look at DTC’s history; check whether this is a current or previous (settled) issue
  • Check all wiring associations, ensure they’re tight and not eroded.
  • Analyze some other issues found utilizing freeze outline information and actually look at related frameworks

Normal errors

Coming up next are probably the most well-known botches that a professional might make while diagnosing a U1120 code:

  • Not utilizing the legitimate symptomatic test hardware
  • Not checking freeze outline information and Checking for DTC’s as it were
  • Not following legitimate fix systems
  • Not utilizing a factory shop manual

Related codes

  • A U1120 is connected with and might be joined by the accompanying codes:
  • U1000 – Lost Correspondence with ECM/PCM
  • U1010-Lost Correspondence with Transmission Control Module (TCM)
  • U1020-Lost Correspondence With Fuel Siphon Control Module

How to fix code U1120

Where are the speed sensors located on a 2004 Dodge Dakota 4.7?

The speed sensor is mated the ABS sensor on a 2004 Dakota. Code P0131 It’s tracked down on the driver’s side of the differential pumpkin.

However, 2004 was a progress year. A few Dakotas (and Rams) had 2 sensors. The ABS sensor was as yet situated on the differential and the speed sensor (a.k.a. — transmission yield sensor) was situated on the traveler side of the transmission.

“There are two sensors, one over the diff for the ABS and one on the transmission for the speedo. On the off chance that your ABS light is on and the speedo doesn’t work, it’s the one over the diff. On the off chance that it’s simply the speedo not working, its the one on the trans”.

What is u1120 code durango – 2005 Dodge Durango

All in all, the U1120 code is a correspondence mistake between the Powertrain Control Module (PCM) and the ABS Module. The ABS Module is liable for giving wheel speed data over the Regulator Region Organization (CAN) C transport, so when it can’t speak with the PCM, it produces mistake codes to tell experts of a misfortune in correspondence. The most well-known causes are erosion on battery terminals and wiring deficiencies.


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