What is the P0499 fault number? What is the Evaporative Emission System Valve Control Circuit high? How do I fix the P0499 fault code What are the symptoms and causes for the P0499 fault code
What is the P0499 Fault code? What does it all mean?
The evaporative (EVAP), emission control system’s job is to capture and return fuel vapors to the engine for reburning. The EVAP system consists mainly of hoses and valves. The fuel vapors are stored in a sealed chamber called a canister container. It contains a carbon filter until they reach the predetermined pressure. The PCM opens a relief valve near the canister container to allow fuel vapors to be sucked into the engine when conditions are favorable. To monitor EVAP system efficiency, the PCM uses an EVAP pressure sensor.
The vent valve of the EVAP system is connected to the canister container to allow fresh air into the system. Vent valves are designed to allow air to enter the system, and to assist in the removal of fuel vapors from the canister canister. The vent valve should be in its normal open position for almost all applications. If the PCM wants to check for leaks in the system, it will apply a 12 volt current and close the valve. If the PCM detects a voltage above the normal level, without causing the EVAP to purge the system, it will set a P0499 Code.
The P0499 fault code can affect vehicles of all makes and models, including Acura, Suzuki Dodge, Dodge, Chevrolet Chrysler, Citroen, Chrysler, Dodge, Chrysler, Jeep, and Chrysler.
What causes the P0499 Fault code?
Below are some reasons to set fault code P0499:
- – Defective EVAP vent valve
- – Defective solenoid/valve for purge control
- – Canister canisters that are clogged or broken
- – Damaged, melted, shorted, or corroded connectors and cables
- – Cracked or incorrectly seated fuel filler cap
- – Broken or cracked vacuum or fuel hoses
- – Defective EVAP pressure sensor
- – Remove the vent valve fuse
- – Defective PCM (rarely)
What are the symptoms of P0499 Malfunction Code?
These symptoms may be present in vehicles with code P0499.
- – Illumination for check engine light
- – P0499 can sometimes be used in conjunction with other fault codes for EVAP systems.
- Sometimes it is impossible to fill the fuel tank up to its full capacity due to fuel system limitations.
- Depending on the nature and extent of the problem, there may be a strong fuel smell.
- A slight increase can be seen in fuel consumption.
How do I fix the P0499 fault code?
There are several repairs that can resolve the P0499 fault code.
- – Inspection, testing and/or replacement EVAP vent valve
- – Replacing a defective purge control solenoid valve or valve
- – Repairing/replacing damaged cables
- – Replacing blownfuses. Blonded fuses can indicate a greater problem that must be addressed.
- Correct installation of fuel tank caps, replacement if necessary
- Cleaning out the clogged canister
- Replacing broken or cracked canisters
- – Repairing damaged or cracked vacuum or fuel lines
- – Replacing a faulty EVAP sensor
How Serious Is the P0499 Fault Code
Fault code 0499 is not a serious problem, and should not have any impact on vehicle operation. If it isn’t fixed, it could cause the vehicle not to pass the emissions test.
