AutoCodes – Ford – P0496 Ford

P0496 Ford Code - Evaporative Emission System High Purge Flow

Quick Answer

The evaporative emission (EVAP) control system limits fuel vapors from escaping into the atmosphere. Common causes include Faulty EVAP Canister Vent Valve, Faulty EVAP Canister Purge valve, Plugged EVAP canister condition. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: P0496 Ford indicates Evaporative Emission System High Purge Flow.
Common causes: Common causes include Faulty EVAP Canister Vent Valve, Faulty EVAP Canister Purge valve, Plugged EVAP canister condition.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 15,300

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 16, 2021

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0496 Ford Description

The evaporative emission (EVAP) control system limits fuel vapors from escaping into the atmosphere. Fuel tank vapors are allowed to move from the fuel tank, due to pressure in the tank, through the vapor pipe, into the EVAP canister. Carbon in the canister absorbs and stores the fuel vapors. Excess pressure is vented through the vent line and EVAP vent solenoid to the atmosphere. The EVAP canister stores the fuel vapors until the engine is able to use them. At an appropriate time, the PCM will command the EVAP purge valve open, allowing engine vacuum to be applied to the EVAP canister. With the EVAP vent valve open, fresh air will be drawn through the valve and vent line to the EVAP canister. Fresh air is drawn through the canister, pulling fuel vapors from the carbon. The air/fuel vapor mixture continues through the EVAP purge pipe and EVAP purge valve into the intake manifold to be consumed during normal combustion. The EVAP system requires the PCM be able to detect a leak as small as 0.040 inch in the EVAP system. The PCM uses several tests to determine if the EVAP system is leaking.

OBDII Code P0496 Ford - Evaporative Emission System High Purge Flow - AutoCodes.com — P0496 Ford Code - Evaporative Emission System High Purge Flow

What does this mean?

What are the Possible Causes of the DTC P0496 Ford?

Faulty EVAP Canister Vent Valve
Faulty EVAP Canister Purge valve
Plugged EVAP canister condition
Faulty EVAP Pressure Sensor
EVAP Canister Vent Valve harness is open or shorted
EVAP Canister Vent Valve circuit poor electrical connection

How to Fix the DTC P0496 Ford?

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 P0496 Ford 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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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 P0496 Ford Code

1. What are the common symptoms of OBDII code P0496 (Ford) related to the Evaporative Emission System High Purge Flow?

The common symptoms include the check engine light coming on, decreased fuel efficiency, and potentially a gasoline smell near the vehicle.

2. What are the possible causes of OBDII code P0496 (Ford) indicating a High Purge Flow in the Evaporative Emission System?

Common causes include a faulty purge valve, a leak in the system, a blocked charcoal canister, or issues with the vacuum lines.

3. How can I diagnose the OBDII code P0496 (Ford) for the Evaporative Emission System High Purge Flow issue?

A diagnostic scanner can be used to read the code and further testing may involve checking the purge valve operation, inspecting for leaks, and testing the integrity of the system components.

4. What are the potential dangers of neglecting to address OBDII code P0496 (Ford) related to the Evaporative Emission System High Purge Flow?

Ignoring this code can lead to increased emissions, potential damage to the engine or catalytic converter, and even failing an emissions test in some states.

5. Can I continue driving my vehicle with OBDII code P0496 (Ford) indicating an issue with the Evaporative Emission System High Purge Flow?

While the vehicle may still be operational, it is recommended to address the issue promptly to prevent further problems and ensure optimal performance and fuel efficiency.

6. How can I repair OBDII code P0496 (Ford) related to the High Purge Flow in the Evaporative Emission System?

Repair steps may involve replacing the purge valve, repairing any leaks in the system, cleaning or replacing the charcoal canister, or ensuring proper operation of the vacuum lines.

7. Are there any DIY tips for addressing OBDII code P0496 (Ford) associated with the Evaporative Emission System High Purge Flow?

While some basic diagnostics can be done at home, it is recommended to consult a professional mechanic for a thorough inspection and proper repair to ensure the issue is resolved correctly.

8. How long does it typically take to repair OBDII code P0496 (Ford) concerning the Evaporative Emission System High Purge Flow?

The repair time can vary depending on the exact cause of the issue, but it usually takes a few hours to a full day to diagnose, repair, and test the system.

9. Is it common for OBDII code P0496 (Ford) related to the Evaporative Emission System High Purge Flow to recur after repair?

If the underlying cause is not properly addressed, the code may reappear. Following the recommended repair steps and ensuring thorough diagnostics can help prevent recurrence.

10. Can extreme weather conditions affect OBDII code P0496 (Ford) indicating a High Purge Flow in the Evaporative Emission System?

Extreme temperatures or humidity levels can impact the performance of the Evaporative Emission System, potentially leading to issues that trigger the P0496 code. Regular maintenance and checks can help mitigate these effects.