OBD Guide
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B1155

Gauge Control Module Lost Communication With Combination Switch Control Unit

B1155 is an OBD-II diagnostic trouble code meaning: Gauge Control Module Lost Communication With Combination Switch Control Unit. Common causes: broken or damaged wiring harness, faulty instrument panel control module. Estimated repair cost: $56–333.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–333 (est.)

Symptoms

  • Lack of response when switches are switched
  • Incorrect instrument readings
  • Warning messages on the dashboard

Causes

  • Broken or damaged wiring harness
  • Faulty instrument panel control module
  • Malfunction of the GABA transmission combination control unit
  • Contact corrosion
  • Power or grounding problems

How to Fix

  1. Check wiring harness for damage
  2. Check connections and contacts on modules
  3. Check power supply and grounding of modules
  4. Test the dashboard control module
  5. Test the switch combination control unit
  6. Replace damaged components

Related codes

U0155U0165B1150

FAQ

What does the B1155 code mean?

B1155 is an OBD-II diagnostic trouble code that indicates: Gauge Control Module Lost Communication With Combination Switch Control Unit

What causes a B1155 error code?

The most common causes of B1155 include: Broken or damaged wiring harness; Faulty instrument panel control module; Malfunction of the GABA transmission combination control unit; Contact corrosion.

How do I fix a B1155 diagnostic trouble code?

To fix B1155: Check wiring harness for damage. Check connections and contacts on modules. Check power supply and grounding of modules. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1155?

Limited driving only, diagnose soon

How much does it cost to fix B1155?

The estimated repair cost for B1155 is $56–333. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat