AutoCodes – Generic – P144C

P144C Code - Evaporative Emission System Purge Check Valve Performance

Quick Answer

The Powertrain Control Module (PCM) tests the Evaporative Emission (EVAP) canister purge check valve for a stuck open condition. Common causes include Stuck open Evaporative Emission (EVAP) canister purge check valve (part of EVAP canister purge valve), Damaged EVAP canister purge check valve. 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: P144C indicates Evaporative Emission System Purge Check Valve Performance.
Common causes: Common causes include Stuck open Evaporative Emission (EVAP) canister purge check valve (part of EVAP canister purge valve), Damaged EVAP canister purge check valve.
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 48,080

How popular is this code, among other codes? Medium

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 Jul 26, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P144C Description

The Powertrain Control Module (PCM) tests the Evaporative Emission (EVAP) canister purge check valve for a stuck open condition. The EVAP canister purge check valve test is performed during minimal boost conditions, once per drive cycle, when entry conditions are met. The DTC is set if the fuel tank pressure exceeds a calibrated amount within a specified amount of time during the test.

OBDII Code P144C - Evaporative Emission System Purge Check Valve Performance - AutoCodes.com — P144C Code - Evaporative Emission System Purge Check Valve Performance

What does this mean?

What are the Possible Causes of the DTC P144C?

Stuck open Evaporative Emission (EVAP) canister purge check valve (part of EVAP canister purge valve)
Damaged EVAP canister purge check valve

How to Fix the DTC P144C?

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 P144C 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 P144C code?

Need more information on how to fix the P144C code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P144C code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P144C Ford — Evaporative Emission System Purge Check Valve Performance
P144C Lincoln — Evaporative Emission System Purge Check Valve Performance
P144C Mercury — Evaporative Emission System Purge Check Valve Performance

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 P144C Code

1. What are the common symptoms of OBDII code P144C?

The common symptoms of code P144C include the check engine light being illuminated, rough idling, decreased fuel efficiency, and difficulty starting the vehicle.

2. What does OBDII code P144C indicate?

OBDII code P144C indicates a problem with the Evaporative Emission System Purge Check Valve Performance.

3. What are the potential causes of OBDII code P144C?

Potential causes of code P144C include a faulty purge valve, leaks in the evaporative emission system, a blocked purge or vent valve, or issues with the fuel tank pressure sensor.

4. How can I diagnose the cause of OBDII code P144C?

Diagnosing the cause of code P144C typically involves inspecting the purge valve, checking for leaks in the evaporative emission system, testing the purge and vent valves, and evaluating the fuel tank pressure sensor.

5. Can I continue driving with OBDII code P144C present?

It is not recommended to continue driving with OBDII code P144C present, as it can lead to decreased fuel efficiency and potential damage to the vehicle's emission control system.

6. How can I repair OBDII code P144C?

Repairing code P144C may involve replacing the purge valve, repairing any leaks in the evaporative emission system, clearing obstructions in the purge or vent valves, or replacing the fuel tank pressure sensor.

7. Is it possible to prevent OBDII code P144C from recurring?

Preventing the recurrence of code P144C involves performing regular maintenance on the evaporative emission system, checking for leaks, and ensuring that the purge and vent valves are functioning correctly.

8. Can a DIY enthusiast fix OBDII code P144C?

Depending on the level of expertise, a DIY enthusiast may be able to fix code P144C by following repair guides and using the necessary tools. However, professional assistance is recommended for complex issues.

9. How urgent is it to address OBDII code P144C?

It is important to address OBDII code P144C in a timely manner to prevent further damage to the vehicle's emission control system and ensure optimal performance and fuel efficiency.

10. How much does it cost to repair OBDII code P144C?

The cost to repair code P144C can vary depending on the underlying cause, parts needed for replacement, and labor costs. It is advisable to obtain quotes from automotive professionals for an accurate estimate.