OBD Guide
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B1108

Diagnosis Sensor Unit

B1108 is an OBD-II diagnostic trouble code meaning: Diagnosis Sensor Unit. Common causes: wiring harness damage, contact corrosion. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Airbag light is on
  • SRS does not activate in an accident
  • Error B1108 is stored in the ECU memory

Causes

  • Wiring harness damage
  • Contact corrosion
  • Malfunction of the sensor diagnostic unit
  • Software glitch

How to Fix

  1. Check wiring harness for damage
  2. Clean contacts from corrosion
  3. Check the sensor diagnostic unit with a multimeter
  4. If necessary, replace the diagnostic unit
  5. Reset the error using an OBD-II scanner

Related codes

B1100B1101B1102

FAQ

What does the B1108 code mean?

B1108 is an OBD-II diagnostic trouble code that indicates: Diagnosis Sensor Unit

What causes a B1108 error code?

The most common causes of B1108 include: Wiring harness damage; Contact corrosion; Malfunction of the sensor diagnostic unit; Software glitch.

How do I fix a B1108 diagnostic trouble code?

To fix B1108: Check wiring harness for damage. Clean contacts from corrosion. Check the sensor diagnostic unit with a multimeter. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1108?

Limited driving only, diagnose soon

How much does it cost to fix B1108?

The estimated repair cost for B1108 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat