RAM U1186: Lost Communication With Adaptive Cruise Control Module

Is your scanner showing RAM U1186?
No worries. We'll show you what it means and how to deal with it.

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OBDCodex, Editor

RAM U1186: Lost Communication With Adaptive Cruise Control Module

DIY Difficulty Level
Repair Cost
Can I Still Drive?
Yes (Short-term only)

What Does The RAM U1186 Code Mean?

The Powertrain Control Module (PCM) doesn’t receive a bus message from the Cruise Control Module for a specific amount of time.

What Are The Potential Causes Of The RAM U1186 Code?

  • CAN C bus open or shorted condition
  • Powertrain control module (PCM)

Recommended Parts

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> Twippo 372Pcs Waterproof Wire Connectors Kit
>>> 2012 Dodge 1500 Ram Truck 5.7L ECU ECM PCM Engine Computer - OEM

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

Reference Sources


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