AutoCodes – GMC – P0498 GMC

P0498 GMC Code - Evaporative Emission System Vent Valve Control Circuit Low

Quick Answer

The Evaporative Emission (EVAP) Vent Solenoid Valve is located on the EVAP canister and is used to seal the canister vent. Common causes include Faulty Evaporative Emission Vent Solenoid Valve, Evaporative Emission Vent Solenoid Valve harness is open or shorted, Evaporative Emission Vent Solenoid Valve electrical circuit poor connection. 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: P0498 GMC indicates Evaporative Emission System Vent Valve Control Circuit Low.
Common causes: Common causes include Faulty Evaporative Emission Vent Solenoid Valve, Evaporative Emission Vent Solenoid Valve harness is open or shorted, Evaporative Emission Vent Solenoid Valve electrical circuit poor connection.
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 2,962

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jun 27, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P0498 GMC Description

The Evaporative Emission (EVAP) Vent Solenoid Valve is located on the EVAP canister and is used to seal the canister vent. The Evaporative Emission Vent Solenoid Valve responds to signals from the Engine Control Module (ECM). Battery voltage is supplied to the EVAP vent solenoid valve through a fuse. The ECM grounds the EVAP Vent Solenoid Valve control circuit through an internal switch called a driver. A plunger will then move to seal the canister vent. The ability to seal the vent is necessary for the on board diagnosis of other evaporative emission control system components. The ECM monitors the status of the driver. A scan tool will display the commanded state of the EVAP Vent Solenoid Valve as Not Venting (On) or Venting (Off). The Diagnostic Trouble Code (DTC) will be set when the ECM detects the EVAP vent solenoid valve control circuit is shorted to the ground within 0.25 s.

OBDII Code P0498 GMC - Evaporative Emission System Vent Valve Control Circuit Low - AutoCodes.com — P0498 GMC Code - Evaporative Emission System Vent Valve Control Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0498 GMC?

Faulty Evaporative Emission Vent Solenoid Valve
Evaporative Emission Vent Solenoid Valve harness is open or shorted
Evaporative Emission Vent Solenoid Valve electrical circuit poor connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0498 GMC?

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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0498 GMC 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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Information for Specific GMC Models

P0498 2014 GMC Sierra — Evaporative Emission System Vent Valve Control Circuit Low
P0498 2015 GMC Sierra — Evaporative Emission System Vent Valve Control Circuit Low
P0498 2016 GMC Sierra — Evaporative Emission System Vent Valve Control Circuit Low
P0498 2017 GMC Sierra — Evaporative Emission System Vent Valve Control Circuit Low
P0498 2018 GMC Sierra — Evaporative Emission System Vent Valve 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 P0498 GMC Code

1. What are the common symptoms of OBDII code P0498 in a GMC vehicle?

The common symptoms of code P0498 include the check engine light illuminating on the dashboard, rough idling, decreased fuel efficiency, and possible issues with the vehicle's emission control system.

2. What causes the OBDII code P0498 to appear in a GMC vehicle?

Code P0498 in a GMC vehicle typically indicates a fault in the evaporative emission system vent valve control circuit, which can be caused by issues such as a faulty vent valve, a damaged wiring harness, or a malfunctioning vent valve solenoid.

3. How serious is the OBDII code P0498 in a GMC vehicle?

While code P0498 may not cause immediate drivability issues, it should not be ignored. Ignoring this code can lead to increased emissions, potential damage to the vehicle's catalytic converter, and may cause the vehicle to fail an emissions test.

4. Can I continue driving my GMC vehicle with OBDII code P0498?

It is generally not recommended to continue driving your GMC vehicle with an unresolved P0498 code. It is best to have the issue diagnosed and repaired as soon as possible to prevent potential damage to the emission control system.

5. How can I diagnose and repair OBDII code P0498 in my GMC vehicle?

Diagnosing code P0498 involves using an OBDII scanner to retrieve the code and inspecting the evaporative emission system components. Repairing the issue may involve replacing the vent valve, checking the wiring for damage, or replacing the vent valve solenoid.

6. Can a DIY enthusiast fix OBDII code P0498 in a GMC vehicle?

While some DIY enthusiasts may be able to diagnose and repair code P0498 themselves, it is recommended to have a professional mechanic perform the diagnosis and repair to ensure the issue is properly addressed.

7. How much does it cost to fix OBDII code P0498 in a GMC vehicle?

The cost of fixing code P0498 in a GMC vehicle can vary depending on the underlying cause of the issue, the parts needed for repair, and the labor rates of the repair shop. It is advisable to obtain quotes from different mechanics for an accurate estimate.

8. Will resetting the check engine light resolve OBDII code P0498 in a GMC vehicle?

Resetting the check engine light may temporarily turn off the warning indicator, but it will not fix the underlying issue causing code P0498. It is crucial to diagnose and address the root cause of the problem to prevent the code from reappearing.

9. What other related codes might be triggered along with P0498 in a GMC vehicle?

Other related codes that may be triggered along with P0498 include P0497 (Evaporative Emission System Low Purge Flow), P0499 (Evaporative Emission System Vent Valve Control Circuit High), and P0455 (Evaporative Emission System Leak Detected).

10. How often should I have the evaporative emission system in my GMC vehicle checked to prevent code P0498?

It is recommended to have the evaporative emission system in your GMC vehicle checked during routine maintenance or if you notice any symptoms of a potential issue. Regular inspections can help prevent code P0498 and ensure your vehicle's emission system is functioning properly.