OBD Guide
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B108C

Start Button Circuit 'B'

B108C is an OBD-II diagnostic trouble code meaning: Start Button Circuit 'B'. Common causes: open or short circuit in the start button circuit, poor contact in the button or control module connectors. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • The engine does not start when the button is pressed
  • Intermittent engine starting
  • Start button backlight flashing

Causes

  • Open or short circuit in the start button circuit
  • Poor contact in the button or control module connectors
  • Malfunction of the start button itself
  • Wiring harness damage

How to Fix

  1. Check the integrity of the start button wiring harness
  2. Inspect the contacts in the connectors for corrosion
  3. Check the resistance of the start button
  4. Scan other related modules for errors
  5. If necessary, replace the start button or repair the wiring harness

Related codes

B108BB108DP0513

FAQ

What does the B108C code mean?

B108C is an OBD-II diagnostic trouble code that indicates: Start Button Circuit 'B'

What causes a B108C error code?

The most common causes of B108C include: Open or short circuit in the start button circuit; Poor contact in the button or control module connectors; Malfunction of the start button itself; Wiring harness damage.

How do I fix a B108C diagnostic trouble code?

To fix B108C: Check the integrity of the start button wiring harness. Inspect the contacts in the connectors for corrosion. Check the resistance of the start button. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B108C?

Limited driving only, diagnose soon

How much does it cost to fix B108C?

The estimated repair cost for B108C is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat