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U1950 Lincoln Code - UPB Communication Bus Fault

- Code Popularity: 2,731 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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By - Updated Jun 09, 2020
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|Code U1950 Lincoln Possible Causes

  • UBP Bus wiring intermittently open/shorted to power or ground
  • Faulty / intermittent electrical connection at any of the controllers on the UBP network

|How do I Fix the Code U1950 Lincoln?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Does your Lincoln have Safety Recalls? → Check here

|Code U1950 Lincoln Tech Notes

This is typically an electrical wiring connection issue at one of the controllers being monitored by the manufacturer.
It can occur if:
Wiring to the module becomes shorted by the module.
Wiring to the module becomes shorted between modules, such as where wires are routed on passenger side floor rails and become water soaked. Watch for water intrusion when this occurs.

|What is the Cost to Diagnose the Code U1950 Lincoln?

Labor: 1.0

The cost of diagnosing the U1950 Lincoln code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

|When is the Code U1950 Lincoln Detected?

When the controllers are unable to communicate with each other at any time while the ignition switch is turned to the “Run” position.

|What are Code U1950 Lincoln Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Engine won’t start – won’t crank
  • ABS Warning Light ON
  • Transmission may shift erratically
  • Cluster won’t register any reading

|Code U1950 Lincoln Description

The Anti-lock Brake System (ABS) module, the Powertrain Control Module (PCM), the Transmission Control Module (TCM), the instrument cluster and the parking aid module are just some of modules that communicate over the UART Based Protocol network bus or UBP Bus. This is a high-speed bus communication system and is not fault tolerant, which means any type of intermittent/loose connection between these 3 controllers will cause communication to stop. When the PCM, ABS module and instrument cluster are unable to communicate with each other at any time while the ignition switch is turned on, code U1950 will set.

OBDII Code U1950 Lincoln - UPB Communication Bus Fault -
U1950 Lincoln Code - UPB Communication Bus Fault

|Need More Information on the U1950 Lincoln Code?

Need more information on how to fix the U1950 Lincoln code? Get Access to Factory Service Manuals

|Need Help with the U1950 Lincoln Code?

Get the U1950 Lincoln code diagnosed by a professional: Find a repair shop in your area

|Code U1950 Lincoln comments

Help us improve Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the U1950 Lincoln code? Have you replaced any parts?
Any information is appreciated. Thanks