OBD Guide
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B103C

Thermoelectric Driver Open Load

B103C is an OBD-II diagnostic trouble code meaning: Thermoelectric Driver Open Load. Common causes: broken wiring harness, thermoelectric actuator malfunction. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • Airbag light is on
  • Restraint system malfunction
  • Error B103C in diagnostic scanner

Causes

  • Broken wiring harness
  • Thermoelectric actuator malfunction
  • Problems with the control unit
  • Contact corrosion

How to Fix

  1. Check the wiring harness for breaks or damage
  2. Check the resistance of the thermoelectric actuator
  3. Inspect contacts for corrosion
  4. Replace faulty components
  5. Reset the error and check the system

Related codes

B103BB103DB103E

FAQ

What does the B103C code mean?

B103C is an OBD-II diagnostic trouble code that indicates: Thermoelectric Driver Open Load

What causes a B103C error code?

The most common causes of B103C include: Broken wiring harness; Thermoelectric actuator malfunction; Problems with the control unit; Contact corrosion.

How do I fix a B103C diagnostic trouble code?

To fix B103C: Check the wiring harness for breaks or damage. Check the resistance of the thermoelectric actuator. Inspect contacts for corrosion. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B103C?

Do not drive — repair immediately

How much does it cost to fix B103C?

The estimated repair cost for B103C is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat