OBD Guide
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B1600

PATS Ignition Key Transponder Signal Is Not Received

B1600 is an OBD-II diagnostic trouble code meaning: PATS Ignition Key Transponder Signal Is Not Received. Common causes: faulty transponder in the key, damaged pats antenna. Estimated repair cost: $56–167.

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

Symptoms

  • Engine won't start
  • The immobilizer indicator is flashing
  • No response when turning the key

Causes

  • Faulty transponder in the key
  • Damaged PATS antenna
  • PATS module malfunction
  • Wiring Harness Problems
  • Dead key battery (if equipped)

How to Fix

  1. Check the serviceability of the key (try a spare one)
  2. Diagnose PATS antenna
  3. Check the integrity of the wiring harness
  4. Scan the PATS module for errors
  5. If necessary, reprogram the key

Related codes

B1601B1602B1603

FAQ

What does the B1600 code mean?

B1600 is an OBD-II diagnostic trouble code that indicates: PATS Ignition Key Transponder Signal Is Not Received

What causes a B1600 error code?

The most common causes of B1600 include: Faulty transponder in the key; Damaged PATS antenna; PATS module malfunction; Wiring Harness Problems.

How do I fix a B1600 diagnostic trouble code?

To fix B1600: Check the serviceability of the key (try a spare one). Diagnose PATS antenna. Check the integrity of the wiring harness. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1600?

Yes, but get it checked soon

How much does it cost to fix B1600?

The estimated repair cost for B1600 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat