A Purge Control Valve Replacement costs by shop in McAllen.
CarAdvise Customers save an average of $36 on A Purge Control Valve Replacement.
POPULAR VEHICLES
Average cost of A Purge Control Valve Replacement for popular vehicle models in McAllen:
Car Model
Avg. cost
$50
THE IMPORTANCE OF A Purge Control Valve Replacement
What is an EVAP purge control valve and how does it work?
The purge control valve is part of the Evaporative Emission Control System (EVAP) of a vehicle. The EVAP system captures gasoline vapors coming from the fuel tank and routes them to be burned in the engine instead of venting into the atmosphere. Fuel vapors that are allowed to escape result not only in lost fuel but also emissions that are harmful to humans and the environment.
Also known as a purge solenoid, the purge control valve allows the fuel tank to be vented so that pressure does not build up inside, while at the same time preventing those vapors from escaping. Vapors that are collected are stored in a special vapor canister where they are absorbed by activated carbon (charcoal) and stored there until the engine control module (ECM) signals the purge valve (solenoid) to open. Once the purge control valve opens, the fumes stored in the canister are drawn out by the engine and burned as part of the combustion process.
COMMON SYMPTOMS
How do I know if my vehicle needs the purge control valve replaced?
When a purge control valve (solenoid) fails, it usually triggers the check engine light to come on. A diagnostic scan of the vehicle will reveal a trouble code related to pressure in the EVAP system. Besides the check engine light and related trouble code, other possible symptoms include:
Difficulty starting your engine
A rough idle
Decreased fuel economy
A failed emissions test
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FREQUENCY OF INSPECTION
How does a technician perform A Purge Control Valve Replacement ?
To replace the purge control valve (solenoid), a technician will generally take the following steps:
Disconnect the negative battery terminal, taking care to preserve the vehicle computer memory
Remove any shields, guards, covers, or ducts to gain access to the purge control valve
Disconnect and remove the wiring from the component
Disconnect any EVAP hoses attached to the purge control valve
Remove any screws or fasteners holding the device in place and remove it from the vehicle
Insert and fasten the new purge control valve in place
Reconnect the hoses and wiring
Reinstall any shields, guards, covers, or ducts that were removed
Reconnect the battery terminal
Start the vehicle and verify the repair by using a scan-tool to test the EVAP system and cycle the EVAP purge control valve/solenoid
OTHER QUESTIONS CUSTOMERS ASK
Can you drive with a faulty purge valve?
The results of driving with a faulty purge valve depend on which position the valve is in when it fails. If the purge valve fails in the closed position, you most likely won't notice driveability issues with your vehicle. But you might find that the check engine light comes on, and you might notice poor fuel mileage. If, on the other hand, the valve fails in the open position, your engine can run rough, stall, shake, be hard to start, and suffer from poor fuel economy.
What happens if the purge control valve fails?
The EVAP system feeds fuel vapors into the engine to be burned rather than be released into the atmosphere. Knowing this, the engine’s computer adjusts the air to fuel ratio to compensate for the addition of fuel. If the purge control valve fails, an excess of fuel (or a decrease) will be present inside the combustion chambers, causing your engine to run either too rich or too lean. Either is problematic for your engine.
What causes purge control valve failure?
Purge control valve failure can be related to a mechanical failure of the device itself, or damaged, decayed, and dirty wires leading to the valve.
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