OBD Guide
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C1109

Power And Ground System

C1109 is an OBD-II diagnostic trouble code meaning: Power And Ground System. Common causes: broken or damaged wiring harness, terminal corrosion or poor contact. Estimated repair cost: $56–167.

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

Symptoms

  • The SRS indicator on the dashboard is on
  • Airbags may not deploy in a crash
  • Belt pretensioners do not work

Causes

  • Broken or damaged wiring harness
  • Terminal corrosion or poor contact
  • Faulty SRS power relay
  • Body weight problems
  • SRS control unit malfunction

How to Fix

  1. Check the integrity of the SRS wiring harness
  2. Inspect and clean power and ground terminals
  3. Check SRS system relays and fuses
  4. Diagnose the SRS control unit
  5. Replace damaged components if necessary

Related codes

B1000B1001B1342

FAQ

What does the C1109 code mean?

C1109 is an OBD-II diagnostic trouble code that indicates: Power And Ground System

What causes a C1109 error code?

The most common causes of C1109 include: Broken or damaged wiring harness; Terminal corrosion or poor contact; Faulty SRS power relay; Body weight problems.

How do I fix a C1109 diagnostic trouble code?

To fix C1109: Check the integrity of the SRS wiring harness. Inspect and clean power and ground terminals. Check SRS system relays and fuses. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1109?

Limited driving only, diagnose soon

How much does it cost to fix C1109?

The estimated repair cost for C1109 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat