BMW DTC P0499 – EVAP System Vent Valve Control Circuit High
DTC P0499 meaning on BMW
The Diagnostic Trouble Code (DTC) P0499 for BMW refers to an issue with the Evaporative Emission (EVAP) System Vent Valve Control Circuit. This code indicates that the control circuit for the EVAP system’s vent valve is registering a high voltage condition, which can lead to improper operation of the EVAP system.
BMW DTC P0499 symptoms
Symptoms of DTC P0499 on a BMW may include:
- Check Engine Light illuminated on the dashboard
- Decreased fuel efficiency
- Strong fuel odor near the vehicle
- Issues with passing emissions tests
BMW DTC P0499 causes
Common causes of DTC P0499 on a BMW include:
- Faulty EVAP system vent valve
- Corroded or damaged wiring in the vent valve control circuit
- Loose or poor electrical connections
- Issues with the EVAP system pressure sensor
BMW DTC P0499 seriousness
While DTC P0499 may not cause immediate drivability issues, it is important to address this code promptly. Ignoring the problem can lead to increased emissions, reduced fuel efficiency, and potential long-term damage to the vehicle’s emissions control system.
How to diagnose DTC P0499 on BMW
To diagnose DTC P0499 on a BMW, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the specific fault code
- Inspect the EVAP system vent valve and associated wiring for any visible damage
- Test the vent valve control circuit for proper voltage and continuity
- Check the EVAP system pressure sensor for proper operation
How to fix DTC P0499 on BMW
To fix DTC P0499 on a BMW, the following steps may be taken:
- Replace the faulty EVAP system vent valve
- Repair or replace any damaged wiring in the vent valve control circuit
- Ensure all electrical connections are secure and free of corrosion
- If necessary, replace the EVAP system pressure sensor
How to erase DTC P0499 on BMW
After addressing the underlying issue causing DTC P0499 on a BMW, the code can be erased using a diagnostic scanner. Once the repair is completed, the scanner can be used to clear the code from the vehicle’s computer memory, resetting the Check Engine Light.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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