AutoCodes – Generic – P149B

P149B Code - Evaporative Emission System Shutoff Valve 2 Control Circuit Low

Quick Answer

The Engine Control Module (ECM) monitors the Evaporative Emission System Shutoff Valve 2. Common causes include Faulty Evaporative Emission System Shutoff Valve 2, Evaporative Emission System Shutoff Valve 2 harness is open or shorted, Evaporative Emission System Shutoff Valve 2 circuit poor electrical connection. 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: P149B indicates Evaporative Emission System Shutoff Valve 2 Control Circuit Low.
Common causes: Common causes include Faulty Evaporative Emission System Shutoff Valve 2, Evaporative Emission System Shutoff Valve 2 harness is open or shorted, Evaporative Emission System Shutoff Valve 2 circuit poor electrical connection.
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 5,662

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 Oct 01, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P149B Description

The Engine Control Module (ECM) monitors the Evaporative Emission System Shutoff Valve 2. The ECM sets the OBDII code when the Evaporative Emission System Shutoff Valve 2 is not to factory specifications.

OBDII Code P149B - Evaporative Emission System Shutoff Valve 2 Control Circuit Low - AutoCodes.com — P149B Code - Evaporative Emission System Shutoff Valve 2 Control Circuit Low

What does this mean?

What are the Possible Causes of the DTC P149B?

Faulty Evaporative Emission System Shutoff Valve 2
Evaporative Emission System Shutoff Valve 2 harness is open or shorted
Evaporative Emission System Shutoff Valve 2 circuit poor electrical connection

How to Fix the DTC P149B?

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 P149B 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.

Need more information about the P149B code?

Need more information on how to fix the P149B code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P149B code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P149B BMW — Evaporative Emission System Shutoff Valve 2 Control Circuit Low
P149B MINI — Evaporative Emission System Shutoff Valve 2 Control Circuit Low

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 P149B Code

1. What are common symptoms of OBDII code P149B?

- Common symptoms include a check engine light illuminated on the dashboard, poor fuel efficiency, and potential difficulties starting the vehicle.

2. What are the possible causes of OBDII code P149B?

- Possible causes include a faulty evaporative emission system shutoff valve, damaged wiring or connectors in the circuit, or a problem with the engine control module.

3. How can I diagnose OBDII code P149B?

- Diagnosing code P149B typically involves using a scan tool to retrieve the code, checking the wiring and connectors for any damage, and testing the evaporative emission system shutoff valve for proper function.

4. Is it safe to continue driving with OBDII code P149B?

- It is generally not recommended to continue driving with code P149B present, as it can lead to decreased fuel efficiency and potential issues with the vehicle's emissions system.

5. Can I repair OBDII code P149B myself?

- Depending on your level of automotive expertise, you may be able to repair code P149B yourself by replacing the faulty evaporative emission system shutoff valve or repairing any damaged wiring or connectors.

6. Are there any quick fixes for OBDII code P149B?

- In some cases, simply clearing the code with a scan tool may temporarily resolve the issue, but it is important to diagnose and address the root cause to prevent the code from reappearing.

7. How much does it typically cost to repair OBDII code P149B?

- The cost of repairing code P149B can vary depending on the specific cause of the issue, but it may range from around $100 to $300 for parts and labor.

8. Can code P149B cause damage to other components of the vehicle?

- While code P149B itself may not cause immediate damage, ignoring the issue can lead to decreased fuel efficiency and potential problems with the vehicle's emissions system over time.

9. Will resetting the check engine light make OBDII code P149B go away?

- Resetting the check engine light may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear once the vehicle is driven again.

10. How do I prevent OBDII code P149B from recurring in the future?

- To prevent code P149B from recurring, it is important to address any underlying issues promptly, perform regular maintenance on the vehicle's emissions system, and address any fuel system issues promptly.