OBD Guide
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B2103

Antenna Not Connected

B2103 is an OBD-II diagnostic trouble code meaning: Antenna Not Connected. Common causes: broken antenna wires, poor contact in antenna connector. Estimated repair cost: $56–167.

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

Symptoms

  • Keyless entry does not work
  • Problems starting the engine
  • The passive safety system fault indicator is on

Causes

  • Broken antenna wires
  • Poor contact in antenna connector
  • Antenna damage
  • SRS control unit malfunction

How to Fix

  1. Check the integrity of the antenna wiring harness
  2. Inspect the antenna connector for oxidation or damage.
  3. Check the performance of the antenna
  4. If necessary, replace the antenna or wiring harness
  5. Reset the error using an OBD-II scanner

Related codes

B2100B2101B2102

FAQ

What does the B2103 code mean?

B2103 is an OBD-II diagnostic trouble code that indicates: Antenna Not Connected

What causes a B2103 error code?

The most common causes of B2103 include: Broken antenna wires; Poor contact in antenna connector; Antenna damage; SRS control unit malfunction.

How do I fix a B2103 diagnostic trouble code?

To fix B2103: Check the integrity of the antenna wiring harness. Inspect the antenna connector for oxidation or damage.. Check the performance of the antenna. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2103?

Limited driving only, diagnose soon

How much does it cost to fix B2103?

The estimated repair cost for B2103 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat