OBD Guide
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B2139

Data Mismatch PCM And PATS

B2139 is an OBD-II diagnostic trouble code meaning: Data Mismatch PCM And PATS. Common causes: damage to the wiring harness between the pcm and pats, pcm malfunction. Estimated repair cost: $56–222.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–222 (est.)

Symptoms

  • Check Engine light comes on
  • Problems starting the engine
  • The engine may not start
  • Loss of power or unstable engine operation

Causes

  • Damage to the wiring harness between the PCM and PATS
  • PCM malfunction
  • PATS system malfunction
  • Problems with the ignition key or its chip
  • Errors when reprogramming modules

How to Fix

  1. Check wiring harness for damage
  2. Check connections between PCM and PATS
  3. Read trouble codes using an OBD-II scanner
  4. Check the condition of the ignition key and its chip
  5. Reprogram PCM and PATS if necessary
  6. Replace faulty modules if required

Related codes

B2140B2141P1260

FAQ

What does the B2139 code mean?

B2139 is an OBD-II diagnostic trouble code that indicates: Data Mismatch PCM And PATS

What causes a B2139 error code?

The most common causes of B2139 include: Damage to the wiring harness between the PCM and PATS; PCM malfunction; PATS system malfunction; Problems with the ignition key or its chip.

How do I fix a B2139 diagnostic trouble code?

To fix B2139: Check wiring harness for damage. Check connections between PCM and PATS. Read trouble codes using an OBD-II scanner. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2139?

Yes, but get it checked soon

How much does it cost to fix B2139?

The estimated repair cost for B2139 is $56–222. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat