P0498

EVAP System Vent Valve Control Circuit Low

Q: Is it safe to drive with P0498?

Yes. It's an emissions-system code and doesn't affect drivability. Just be aware the car will fail an emissions test until it's repaired.

Q: Can I just clear P0498?

You can, but it will reappear once the EVAP monitor runs again unless the vent valve or its circuit is actually fixed.

EVAP emissions Generic OBD-II Low

What it means

P0498 means the ECM detected a low-voltage (or shorted-low) fault in the control circuit for the EVAP canister vent valve. This valve seals and vents the evaporative-emissions system during leak tests. The engine runs normally — the practical effects are the check-engine light and an emissions-test failure until the wiring or vent valve is repaired.

Low

Can I keep driving? Safe to drive — this is an evaporative-emissions fault with no effect on how the engine runs; the main consequences are the warning light and a failed emissions test.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Appears alongside · share of P0498 scans

P0135in 65.6% of scans

P2185in 65.6% of scans

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
Emissions/smog test failure
Often no noticeable driving symptoms
Occasionally a faint fuel-vapor smell near the canister

Common causes

Most likely first

Short-to-ground or low-voltage fault in the EVAP vent valve control circuitLikely
Faulty EVAP canister vent valve/solenoidCommon
Loose or corroded connector at the vent valveCommon
Chafed or damaged wiring to the vent valve (often near the rear of the vehicle)Less often
Rarely, a failed ECM driverLess often

How to diagnose & fix

Work through it in order

Read freeze-frame data and check the vent valve command vs. circuit voltage on a scan tool.
Inspect the vent valve connector and wiring for a short-to-ground or open circuit.
Measure the vent valve solenoid resistance and compare to spec.
Replace the EVAP vent valve/solenoid if the wiring is good but it's out of spec.
Clear the code and run an EVAP monitor drive cycle to confirm the fix.

FAQ

Quick answers

Is it safe to drive with P0498?+

Yes. It's an emissions-system code and doesn't affect drivability. Just be aware the car will fail an emissions test until it's repaired.

Can I just clear P0498?+

You can, but it will reappear once the EVAP monitor runs again unless the vent valve or its circuit is actually fixed.

Read & clear P0498 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX