OBD Guide
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B2A09

Telematics I-Call Button Circuit

B2A09 is an OBD-II diagnostic trouble code meaning: Telematics I-Call Button Circuit. Common causes: open or shorted wiring harness, malfunction of the button itself. Estimated repair cost: $56–167.

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

Symptoms

  • Emergency call button does not work
  • Error message on the dashboard
  • Lack of communication with Telematics operator

Causes

  • Open or shorted wiring harness
  • Malfunction of the button itself
  • Problems with the Telematics module
  • Contact corrosion

How to Fix

  1. Check the integrity of the wiring harness
  2. Test the button for mechanical damage
  3. Check contacts and connections
  4. Replace faulty components
  5. Reset error and check functionality

Related codes

B2A08B2A10U0155

FAQ

What does the B2A09 code mean?

B2A09 is an OBD-II diagnostic trouble code that indicates: Telematics I-Call Button Circuit

What causes a B2A09 error code?

The most common causes of B2A09 include: Open or shorted wiring harness; Malfunction of the button itself; Problems with the Telematics module; Contact corrosion.

How do I fix a B2A09 diagnostic trouble code?

To fix B2A09: Check the integrity of the wiring harness. Test the button for mechanical damage. Check contacts and connections. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2A09?

Yes, but get it checked soon

How much does it cost to fix B2A09?

The estimated repair cost for B2A09 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat