OBD Guide
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B27A3

Open in Drivers Side Rear Door Electrical Antenna Circuit

B27A3 is an OBD-II diagnostic trouble code meaning: Open in Drivers Side Rear Door Electrical Antenna Circuit. Common causes: broken wires in the rear left door harness, antenna contact corrosion. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Problems with keyless entry to the rear left door
  • Malfunction of the anti-theft system
  • The malfunction indicator on the instrument panel lights up

Causes

  • Broken wires in the rear left door harness
  • Antenna contact corrosion
  • Antenna malfunction
  • Damage to the wiring harness due to mechanical impact

How to Fix

  1. Check the integrity of the wiring harness in the rear left door
  2. Inspect the antenna contacts for corrosion
  3. Check the performance of the antenna
  4. Replace damaged wires or antenna if necessary

Related codes

B27A4B27A5

FAQ

What does the B27A3 code mean?

B27A3 is an OBD-II diagnostic trouble code that indicates: Open in Drivers Side Rear Door Electrical Antenna Circuit

What causes a B27A3 error code?

The most common causes of B27A3 include: Broken wires in the rear left door harness; Antenna contact corrosion; Antenna malfunction; Damage to the wiring harness due to mechanical impact.

How do I fix a B27A3 diagnostic trouble code?

To fix B27A3: Check the integrity of the wiring harness in the rear left door. Inspect the antenna contacts for corrosion. Check the performance of the antenna. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B27A3?

Yes, but get it checked soon

How much does it cost to fix B27A3?

The estimated repair cost for B27A3 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat