OBD Guide
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B1601

PATS Received Incorrect Key-Code From Ignition Key Transponder

B1601 is an OBD-II diagnostic trouble code meaning: PATS Received Incorrect Key-Code From Ignition Key Transponder. Common causes: faulty transponder in the key, damaged pats 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 immobilizer indicator is flashing
  • PATS system disables engine operation

Causes

  • Faulty transponder in the key
  • Damaged PATS antenna
  • PATS module failure
  • PATS wiring harness problems

How to Fix

  1. Check the serviceability of the key (try a spare one)
  2. Diagnose the PATS antenna and its connection
  3. Check PATS module for errors
  4. If necessary, reprogram the keys

Related codes

B1602B1603

FAQ

What does the B1601 code mean?

B1601 is an OBD-II diagnostic trouble code that indicates: PATS Received Incorrect Key-Code From Ignition Key Transponder

What causes a B1601 error code?

The most common causes of B1601 include: Faulty transponder in the key; Damaged PATS antenna; PATS module failure; PATS wiring harness problems.

How do I fix a B1601 diagnostic trouble code?

To fix B1601: Check the serviceability of the key (try a spare one). Diagnose the PATS antenna and its connection. Check PATS module for errors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1601?

Yes, but get it checked soon

How much does it cost to fix B1601?

The estimated repair cost for B1601 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat