What happens if you have a bad vent valve?
What happens if you have a bad vent valve?
Normally, the vent valve is open, and closes when the engine computer tests the EVAP system to detect if there are leaks. If a leak in the EVAP system is identified, the Check Engine Light turns on the dash and the trouble code linked to the problem will get stored in the engine computer. What are the symptoms of a bad vent valve?
When does a Nissan vent control valve close?
Normally, the vent valve is open, and closes when the engine computer tests the EVAP system to detect if there are leaks. If a leak in the EVAP system is identified, the Check Engine Light turns on the dash and the trouble code linked to the problem will get stored in the engine computer.
When does a PCM need to close the vent valve?
On almost all applications, the vent valve is normally open, and the application of a 12-volt circuit current closes the valve when the PCM needs to pressurize the EVAP system to test for leaks. Problems in the control circuit or a failure of the vent valve itself will store a trouble code and trigger the CHECK engine light.
How to tell if your EVAP vent solenoid needs to be replaced?
Some of the warning signs that a problem with the EVAP vent solenoid exists and needs to be replaced may include the following: Check engine light stays on: The check engine light is the first warning light indicator that reveals a potential problem with the EVAP vent solenoid.
How much does it cost to replace a vent valve?
Replacing a vent valve is not a complicated process so the labor can only cost around $50. It is rather quick and straightforward. However, the parts are more expensive than the labor cost. Replacement parts can cost between $75 and $110. The total cost can run between $110 and $170.
Normally, the vent valve is open, and closes when the engine computer tests the EVAP system to detect if there are leaks. If a leak in the EVAP system is identified, the Check Engine Light turns on the dash and the trouble code linked to the problem will get stored in the engine computer. What are the symptoms of a bad vent valve?
What’s the reset code for the EVAP vent?
This answer was rated: P0449..Replaced evap vent/valve and reset code..comes back… P0449 code. Replaced evap vent/valve… P0449 code. Replaced evap vent/valve and reset code. Still comes back. Purge valve is working fine and vent/valve has power? What gives? Show More Show Less Ask Your Own GM Question Share this conversation
What should I do if I replaced my vent?
If you replaced the vent, and it was the correct one, the next step is to run thru that diagnostic flow chart, running all the tests it suggests to run. That is the official GM diagnostic flow chart. Taking a “guess” and replacing parts will get costly. Sometimes you got to put in the work to get the correct diagnosis.
