AutoCodes – Generic – B2139

B2139 Code - Data Mismatch PCM And PATS

Quick Answer

The Diagnostic Trouble Code (DTC) sets when there is an ID mismatch between the Powertrain Control Module (PCM) and Passive Anti-Theft System (PATS) Common causes include Powertrain Control Module (PCM) Reprogram, Passive Anti-Theft System (PATS). Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B2139 indicates Data Mismatch PCM And PATS.
Common causes: Common causes include Powertrain Control Module (PCM) Reprogram, Passive Anti-Theft System (PATS).
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 29,182

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 19, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2139 Description

The Diagnostic Trouble Code (DTC) sets when there is an ID mismatch between the Powertrain Control Module (PCM) and Passive Anti-Theft System (PATS)

OBDII Code B2139 - Data Mismatch PCM And PATS - AutoCodes.com — B2139 Code - Data Mismatch PCM And PATS

What does this mean?

What are the Possible Causes of the DTC B2139?

Powertrain Control Module (PCM) Reprogram
Passive Anti-Theft System (PATS)

How to Fix the DTC B2139?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2139 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B2139 Code

1. What are the common symptoms of OBDII code B2139 (Data Mismatch PCM And PATS)?

- Common symptoms include engine stalling, difficulty starting the vehicle, and the security light flashing on the dashboard.

2. What can cause the OBDII code B2139 to trigger?

- This code is typically triggered by a communication error between the Powertrain Control Module (PCM) and the Passive Anti-Theft System (PATS).

3. How can I diagnose the cause of OBDII code B2139?

- Diagnosis involves checking the wiring connections between the PCM and PATS, inspecting for damaged wiring, and verifying the programming of both modules.

4. What are some possible repair tips for fixing OBDII code B2139?

- Repair tips include ensuring all wiring connections are secure, repairing any damaged wiring, and reprogramming the PCM and PATS if necessary.

5. Can OBDII code B2139 be fixed without professional help?

- While some DIY enthusiasts may attempt to fix this code, it is recommended to consult a professional mechanic for accurate diagnosis and repair.

6. Is it safe to continue driving with OBDII code B2139 active?

- It is not recommended to drive with this code active, as it can lead to potential issues with starting the vehicle and may result in unexpected stalling.

7. How much does it typically cost to repair OBDII code B2139?

- Repair costs can vary depending on the extent of the issue, but expect to pay for diagnostic time, potential wiring repairs, and module reprogramming.

8. Can a low battery voltage cause OBDII code B2139 to trigger?

- Yes, a low battery voltage can sometimes lead to communication errors between the PCM and PATS, triggering the B2139 code.

9. Will resetting the PCM clear OBDII code B2139?

- Resetting the PCM may temporarily clear the code, but it is important to diagnose and repair the underlying issue to prevent the code from recurring.

10. How long does it typically take to repair OBDII code B2139?

- The repair time can vary based on the complexity of the issue, but most experienced mechanics can diagnose and fix the problem within a few hours to a day.