OBD Guide
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U18A6

Lost Communication With Right Object Detection Control Module On Dedicated Bus 1

U18A6 is an OBD-II diagnostic trouble code meaning: Lost Communication With Right Object Detection Control Module On Dedicated Bus 1. Common causes: open or short circuit in the module power supply circuit, damage to the wiring harness or module connector. Estimated repair cost: $167–556.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$167–556 (est.)

Symptoms

  • Disabling Driver Assistance Systems (ADAS)
  • Error message on the dashboard
  • Object detection functions do not work on the right side
  • Activation of the malfunction indicator lamp

Causes

  • Open or short circuit in the module power supply circuit
  • Damage to the wiring harness or module connector
  • Right object detection module malfunction
  • Problems with the communication bus (CAN bus)
  • Software errors in the module

How to Fix

  1. Check the integrity of the power supply and grounding circuits of the module
  2. Inspect the wiring harness and connectors for damage
  3. Check the functionality of the object detection module
  4. Scan the system for additional trouble codes
  5. Update module software if necessary
  6. Repair only from an authorized dealer

Related codes

U18A5U18A7U18A8

FAQ

What does the U18A6 code mean?

U18A6 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Right Object Detection Control Module On Dedicated Bus 1

What causes a U18A6 error code?

The most common causes of U18A6 include: Open or short circuit in the module power supply circuit; Damage to the wiring harness or module connector; Right object detection module malfunction; Problems with the communication bus (CAN bus).

How do I fix a U18A6 diagnostic trouble code?

To fix U18A6: Check the integrity of the power supply and grounding circuits of the module. Inspect the wiring harness and connectors for damage. Check the functionality of the object detection module. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U18A6?

Limited driving only, diagnose soon

How much does it cost to fix U18A6?

The estimated repair cost for U18A6 is $167–556. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat