AutoCodesGeneric – P144A

P144A Code - Evaporative Emission System Purge Vapor Line Restricted/Blocked

Quick Answer

The Powertrain Control Module (PCM) monitors the Evaporative Emission (EVAP) system for a blocked fuel vapor tube between the Fuel Tank Pressure (FTP) sensor and the fuel tank. Common causes include Faulty Evaporative Emission System Purge Valve, Evaporative Emission System Purge Valve harness is open or shorted, Evaporative Emission System Purge Valve 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
P144A indicates Evaporative Emission System Purge Vapor Line Restricted/Blocked.
Common causes
Common causes include Faulty Evaporative Emission System Purge Valve, Evaporative Emission System Purge Valve harness is open or shorted, Evaporative Emission System Purge Valve 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 15,295
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 13, 2020
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Code P144A Description

The Powertrain Control Module (PCM) monitors the Evaporative Emission (EVAP) system for a blocked fuel vapor tube between the Fuel Tank Pressure (FTP) sensor and the fuel tank. During the initial phase of the EVAP monitor, the PCM closes the canister vent and a vacuum develops in the fuel vapor tubes and lines and in the fuel tank. The PCM monitors the FTP sensor to determine the amount of vacuum and how quickly the vacuum increases. The rate at which the vacuum increases is compared to an expected value. If the vacuum increases quicker than expected, a blocked fuel vapor tube is suspected and an intrusive test is carried out in the final phase of the EVAP monitor.
OBDII Code P144A - Evaporative Emission System Purge Vapor Line Restricted/Blocked - AutoCodes.com
P144A Code - Evaporative Emission System Purge Vapor Line Restricted/Blocked

What are the Possible Causes of the DTC P144A?

  • Faulty Evaporative Emission System Purge Valve
  • Evaporative Emission System Purge Valve harness is open or shorted
  • Evaporative Emission System Purge Valve circuit poor electrical connection
  • Blocked fuel vapor tube between the Fuel Tank Pressure (FTP) sensor and the fuel tank

How to Fix the DTC P144A?

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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P144A 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 P144A code?

Need more information on how to fix the P144A code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P144A code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

  • P144A Ford — Evaporative Emission System Purge Vapor Line Restricted/Blocked
  • P144A Lincoln — Evaporative Emission System Purge Vapor Line Restricted/Blocked
  • P144A Mercury — Evaporative Emission System Purge Vapor Line Restricted/Blocked
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 P144A Code

1. What are the common symptoms of OBDII code P144A?

- Common symptoms include difficulty starting the vehicle, reduced fuel efficiency, and the illumination of the check engine light.

2. What causes the OBDII code P144A to trigger?

- This code is typically triggered by a restriction or blockage in the evaporative emission system purge vapor line.

3. How can a restricted or blocked evaporative emission system purge vapor line be diagnosed?

- A diagnostic scan tool can be used to retrieve the specific code, and a visual inspection of the purge vapor line for any physical obstructions can help diagnose the issue.

4. What are the repair options for OBDII code P144A?

- Repair options may include clearing any blockages in the purge vapor line, replacing damaged components, or addressing any leaks in the system.

5. Can driving with OBDII code P144A cause further damage to the vehicle?

- Continuing to drive with this code may lead to decreased fuel efficiency and potential damage to other components in the evaporative emission system.

6. How much does it typically cost to repair OBDII code P144A?

- The cost of repairs for this code can vary depending on the extent of the issue and whether any components need to be replaced. It is recommended to consult with a professional mechanic for an accurate estimate.

7. Is it safe to continue driving with the check engine light on due to code P144A?

- While the vehicle may still be operable, it is recommended to address the issue promptly to prevent any further complications and ensure optimal performance.

8. Can a DIY enthusiast fix OBDII code P144A at home?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address this code by clearing blockages in the purge vapor line. However, it is advised to seek professional help if unsure.

9. How long does it take to repair OBDII code P144A?

- The repair time for this code can vary based on the complexity of the issue and the availability of parts. Simple fixes may take a short amount of time, while more involved repairs could take longer.

10. Will resetting the check engine light resolve OBDII code P144A?

- Resetting the check engine light may temporarily turn it off, but if the underlying issue causing code P144A is not addressed, the light is likely to come back on.

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