Error code

OBD2 P0498

OBD2P0498
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Evaporative Emission System Vent Valve Control Circuit Low.

Severity

moderateCan drive, but reduced fuel economy and slight performance loss may occur.

Summary

P0498 indicates an issue with the evaporative emission system's vent valve control circuit being too low in voltage or resistance. This problem is related to the EVAP system which manages fuel vapors.

Symptoms

  • Malfunction Indicator Light (MIL) illuminated
  • Reduced fuel economy
  • Slight performance loss

Common Causes

  • Faulty vent valve (canister close valve or CCV)
  • Rodent damage to wiring and connectors in the EVAP system

Diagnosis

  1. Use a digital multimeter (DVOM) to check resistance across the vent valve terminals
  2. Inspect wiring harness for broken or chafed wires
  3. Check connector pins for bent, broken, or corroded connections

Fixes

  • Replace faulty vent valve

FAQ

What should I do if the MIL is on and P0498 appears?

Start by checking the resistance of the vent valve and inspecting for any rodent damage or corrosion in the wiring.

Is it safe to drive with a P0498 code?

Yes, but you may experience reduced fuel economy and slight performance issues. It's recommended to address the issue soon.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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