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P0499

Overview

Code

P0499

Code Type

P

Code Class

P0

System

Engine, Emissions

Severity Level

Low

Emissions Related

true

Drivability Impact

None

Diagnostic Protocol

OBD2

Freeze Frame Useful

true

Code Definition

Diagnostic trouble code P0499 indicates high voltage in the EVAP vent valve control circuit

Symptoms

Check Engine Light illuminated

Overview applies to this diagnostic code.

Affected Systems

On This Page

  • Code Definition

  • Symptoms

  • Affected Systems

  • Possible Causes

  • Diagnostic Steps

  • Drive Safety Notes​

More Resources

EVAP vent valve control system

Possible Causes

Wiring short to voltage; Faulty vent valve

Diagnostic Steps

1 Inspect control circuit; 2 Test vent valve resistance; 3 Replace valve if needed

Drive Safety Notes

EVAP system may not vent properly

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