P0499 - OBD Trouble Code

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If P0499 trouble code has been detected in the OBD scanner, then it would indicate that that engine control module has found some unusual amounts of pressure in the evaporative emissions system.

The fault P0499 can be defined as Evaporative Emission System Vent Valve Control Circuit High. This diagnostic fault code is a generic powertrain code, which means that it would apply to the OBD-II equipped vehicles. The specific repair steps can vary as it depends upon the vehicle make and model.

It is the evaporative emissions system which limits the fuel vapours from being released into the atmosphere. There can be sometimes when the purge valve would be opened up by the EVAP system to draw in the fresh air for the system.

What causes this problem with the Evaporative Emission System Vent Valve Control Circuit High?

• The purge control solenoid or valve can be faulty
• The fuses might turn out to be blown out
• There can be broken charcoal canister
• The vacuum or fuel vapour hoses might be cracked or broken
• Defaults in the EVAP canister vent valve
• The charcoal canister might be clogged
• Quirks in the pressure sensor

1. Powertrain Control Module - There can be some issues with the Powertrain Control Module due to which you may see P0499 code appearing over and over again. Visit us to buy best quality PCM online.
2. Purge Solenoid - A lot of issues can arise do to defective Purge Solenoid. Did you just see P0499 code flashing? Now you know the reason why it is appearing. Get it inspected and replaced on time.
3. Charcoal Canister - Faulty boost Charcoal Canister can be the reason why P0499 code is flashing. Visit us to purchase top notch Charcoal Canister online.
4. Engine Control Module - It is an important auto part which needs full care. A faulty Engine Control Module can be a reason behind the flashing up of P0499 code.
5. Evap Canister - If there is any fault detected in the Evap Canister, it will get stored in the ECM and flash OBD Code P0499. Replace faulty Evap Canister now!
6. EVAP System - Faulty/damaged EVAP System will give rise to P0499 trouble code. Thus, it is important to replace it immediately.

It is vital to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD Code P0499 here:

Common Symptoms

• The engine might overheat
• The check engine light can start flashing up

The repairs which you will have to do to correct this fault code are simply straightforward; you can surely pinpoint the necessary repairs on the basis of your diagnosis. Have a look at some common fixes:

• Make sure to install the fuel cap correctly
• Replace the defective purge control solenoid or valve
• If there are some faults in the EVAP canister vent valve, then it should be replaced
• Clear the clogged charcoal canister
• The broken charcoal canister should be replaced
• Repair or replace the cracked or broken vacuum or fuel vapour hoses
• Restore the quirky pressure sensor
• Replace the blown fuses

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Here are some steps which you should follow in order to diagnose this fault code:

An OBD-II scanner should be utilized to detect the P0499 code; a technician should begin with a visual inspection of all the wiring, connectors, and other electrical components of the emissions system

If there are any damaged elements, then they should be replaced, reconnected, or repaired as per the need

After that the mechanic should then retest the system after clearing the code from the PCM. If the code reappears, then the mechanic has diagnosed an issue with the EVAP emissions system, and then he can do further repairs

Common Mistakes When Diagnosing The P0499 Code

• When the trouble P0499 code is diagnosed, then a common misdiagnosis is to replace the EVAP emissions system components rather than checking for a vacuum leak or an improperly installed fuel cap.
• These parts are more likely to be defective than a part that needs replacement.