OBD Guide
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B10D9

PATS Transponder Missing Message

B10D9 is an OBD-II diagnostic trouble code meaning: PATS Transponder Missing Message. Common causes: faulty ignition key, damaged transponder antenna. Estimated repair cost: $56–167.

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

Symptoms

  • Engine won't start
  • The engine stalls immediately after starting
  • The immobilizer indicator is flashing

Causes

  • Faulty ignition key
  • Damaged transponder antenna
  • Open circuit in the PATS wiring harness
  • PATS module malfunction

How to Fix

  1. Check the ignition key for damage
  2. Diagnose the transponder antenna
  3. Check the integrity of the PATS system wiring harness
  4. Scan the PATS module for errors

Related codes

B10DAB10DBB10DC

FAQ

What does the B10D9 code mean?

B10D9 is an OBD-II diagnostic trouble code that indicates: PATS Transponder Missing Message

What causes a B10D9 error code?

The most common causes of B10D9 include: Faulty ignition key; Damaged transponder antenna; Open circuit in the PATS wiring harness; PATS module malfunction.

How do I fix a B10D9 diagnostic trouble code?

To fix B10D9: Check the ignition key for damage. Diagnose the transponder antenna. Check the integrity of the PATS system wiring harness. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B10D9?

Yes, but get it checked soon

How much does it cost to fix B10D9?

The estimated repair cost for B10D9 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat