OBD Guide
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B1A71

Passive Entry Antenna 1 General Electric Failure

B1A71 is an OBD-II diagnostic trouble code meaning: Passive Entry Antenna 1 General Electric Failure. Common causes: broken or damaged antenna wiring harness, 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

  • Problems opening doors using keyless entry
  • The car does not recognize the key
  • Fault indication on the dashboard

Causes

  • Broken or damaged antenna wiring harness
  • Poor contact in antenna connector
  • Failure of passive input antenna 1
  • Problems with the passive input module

How to Fix

  1. Check the integrity of the antenna wiring harness
  2. Clean and check the contacts in the antenna connector
  3. Check antenna resistance (if possible)
  4. Replace passive input 1 antenna if necessary
  5. Check and, if necessary, replace the passive input module

Related codes

B1A72B1A73

FAQ

What does the B1A71 code mean?

B1A71 is an OBD-II diagnostic trouble code that indicates: Passive Entry Antenna 1 General Electric Failure

What causes a B1A71 error code?

The most common causes of B1A71 include: Broken or damaged antenna wiring harness; Poor contact in antenna connector; Failure of passive input antenna 1; Problems with the passive input module.

How do I fix a B1A71 diagnostic trouble code?

To fix B1A71: Check the integrity of the antenna wiring harness. Clean and check the contacts in the antenna connector. Check antenna resistance (if possible). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1A71?

Limited driving only, diagnose soon

How much does it cost to fix B1A71?

The estimated repair cost for B1A71 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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