AutoCodes – Generic – P0498

P0498 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 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 32,039

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 Jun 27, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
Comments
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Code P0498 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 - Evaporative Emission System Vent Valve Control Circuit Low - AutoCodes.com — P0498 Code - Evaporative Emission System Vent Valve Control Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0498?

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?

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 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 Makes

P0498 Buick — Evaporative Emission System Vent Valve Control Circuit Low
P0498 Cadillac — Evaporative Emission System Vent Valve Control Circuit Low
P0498 Chevrolet — Evaporative Emission System Vent Valve Control Circuit Low
P0498 Chrysler — NVLD Vent Valve Solenoid Circuit Low
P0498 Dodge — NVLD Vent Valve Solenoid Circuit Low
P0498 GMC — Evaporative Emission System Vent Valve Control Circuit Low
P0498 Honda — Evaporative Emission System Canister Vent Shut Valve Control Circuit Low Voltage
P0498 Hyundai — Evaporative Emission System Vent Valve Control Circuit Low
P0498 Jeep — NVLD Vent Valve Solenoid Circuit Low
P0498 KIA — 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.