AutoCodes – Generic – P149A

P149A Code - Evaporative Emission System Shutoff Valve 2 Control Circuit

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: P149A indicates Evaporative Emission System Shutoff Valve 2 Control Circuit.
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 7,467

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 P149A 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 P149A - Evaporative Emission System Shutoff Valve 2 Control Circuit - AutoCodes.com — P149A Code - Evaporative Emission System Shutoff Valve 2 Control Circuit

What does this mean?

What are the Possible Causes of the DTC P149A?

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 P149A?

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 P149A 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 P149A code?

Need more information on how to fix the P149A code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P149A code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P149A BMW — Evaporative Emission System Shutoff Valve 2 Control Circuit
P149A MINI — Evaporative Emission System Shutoff Valve 2 Control Circuit

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 P149A Code

1. What are the common symptoms of OBDII code P149A?

- Common symptoms include the illumination of the check engine light, rough idling, decreased fuel efficiency, and potential issues with the vehicle's emissions system.

2. What does OBDII code P149A indicate?

- OBDII code P149A refers to a fault in the Evaporative Emission System Shutoff Valve 2 Control Circuit.

3. What are the possible causes of OBDII code P149A?

- Possible causes include a faulty shutoff valve, damaged wiring or connectors in the control circuit, a malfunctioning PCM (Powertrain Control Module), or a vacuum leak in the evaporative emission system.

4. How can I diagnose the cause of OBDII code P149A?

- Diagnosing the cause may involve visually inspecting the shutoff valve and its wiring, testing the valve's operation with a multimeter, checking for vacuum leaks, and using a scan tool to monitor sensor data.

5. Can I continue driving with OBDII code P149A?

- It is not recommended to ignore OBDII code P149A, as it can lead to potential issues with the vehicle's emissions system and overall performance. It is advisable to address the problem promptly.

6. How can I repair OBDII code P149A?

- Repair may involve replacing the faulty shutoff valve, repairing damaged wiring or connectors, addressing vacuum leaks, or reprogramming the PCM. It is recommended to consult a professional mechanic for proper diagnosis and repair.

7. Is OBDII code P149A a serious issue?

- While OBDII code P149A may not cause immediate drivability issues, it is important to address the problem to prevent potential damage to the vehicle's emissions system and ensure optimal performance.

8. Can a DIY enthusiast fix OBDII code P149A?

- Depending on your experience and access to tools, you may be able to diagnose and repair OBDII code P149A. However, it is recommended to seek assistance from a qualified mechanic for accurate diagnosis and proper repair.

9. How much does it cost to fix OBDII code P149A?

- The cost of fixing OBDII code P149A can vary depending on the exact cause of the issue, the need for parts replacement, and labor costs. It is advisable to obtain estimates from local repair shops for an accurate cost assessment.

10. How often does OBDII code P149A occur in vehicles?

- OBDII code P149A related to the Evaporative Emission System Shutoff Valve 2 Control Circuit is relatively uncommon, but it can occur in vehicles with issues in this specific system. Regular maintenance and inspections can help prevent such codes from appearing.