OBD Guide
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B109E

Panel Model Door 2 Control Circuit Open

B109E is an OBD-II diagnostic trouble code meaning: Panel Model Door 2 Control Circuit Open. Common causes: broken wires in the harness, contact corrosion. Estimated repair cost: $56–167.

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

Symptoms

  • SRS/Airbag light is on
  • Security error message on dashboard
  • Disabling associated airbags

Causes

  • Broken wires in the harness
  • Contact corrosion
  • Side curtain squib malfunction
  • Problems with the SRS control unit

How to Fix

  1. Carry out diagnostics using an SRS scanner to clarify the location of the fault.
  2. Visually check the wiring harness in the door area and hinges
  3. Check contacts and connectors
  4. Measure the circuit resistance
  5. If necessary, replace damaged wires or squib
  6. Reset errors and test the system

Related codes

B109DB109FB1090

FAQ

What does the B109E code mean?

B109E is an OBD-II diagnostic trouble code that indicates: Panel Model Door 2 Control Circuit Open

What causes a B109E error code?

The most common causes of B109E include: Broken wires in the harness; Contact corrosion; Side curtain squib malfunction; Problems with the SRS control unit.

How do I fix a B109E diagnostic trouble code?

To fix B109E: Carry out diagnostics using an SRS scanner to clarify the location of the fault.. Visually check the wiring harness in the door area and hinges. Check contacts and connectors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B109E?

Do not drive — repair immediately

How much does it cost to fix B109E?

The estimated repair cost for B109E is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat