OBD Guide
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B27A7

Open In Inside Luggage Compartment Electrical Key Oscillator Circuit

B27A7 is an OBD-II diagnostic trouble code meaning: Open In Inside Luggage Compartment Electrical Key Oscillator Circuit. Common causes: broken or damaged wiring harness, oxidation of contacts in connectors. Estimated repair cost: $56–167.

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

Symptoms

  • Remote trunk release does not work
  • Error indication on the dashboard
  • The trunk does not open from the button in the cabin

Causes

  • Broken or damaged wiring harness
  • Oxidation of contacts in connectors
  • Key oscillator malfunction
  • Body Control Module (BCM) Problems

How to Fix

  1. Check the integrity of the wiring harness in the trunk
  2. Inspect and clean the contacts in the connectors
  3. Check the operation of the key oscillator
  4. Scan the BCM for errors
  5. Replace faulty components if necessary

Related codes

B27A8B27A9U0155

FAQ

What does the B27A7 code mean?

B27A7 is an OBD-II diagnostic trouble code that indicates: Open In Inside Luggage Compartment Electrical Key Oscillator Circuit

What causes a B27A7 error code?

The most common causes of B27A7 include: Broken or damaged wiring harness; Oxidation of contacts in connectors; Key oscillator malfunction; Body Control Module (BCM) Problems.

How do I fix a B27A7 diagnostic trouble code?

To fix B27A7: Check the integrity of the wiring harness in the trunk. Inspect and clean the contacts in the connectors. Check the operation of the key oscillator. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B27A7?

Limited driving only, diagnose soon

How much does it cost to fix B27A7?

The estimated repair cost for B27A7 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat