Q: my emissions service light is on and car stalls

asked by on January 02, 2017

My service emissions light came on and engine stalled but starts and stalls again could this be the gas cap

My car has 172000 miles.
My car has an automatic transmission.

Evaporation Vent Solenoid Replacement $106.26 - $358.99 Get a Quote

Hi There, Your car has a small purge valve called a purge solenoid that controls the venting of fumes from the fuel tank as these fumes build up inside, particularly when you are refueling the car with gas. The EVAP system prevents fuel vapors from the fuel tank from escaping into the atmosphere. The EVAP system collects and temporarily stores the fuel vapors in the charcoal canister. The charcoal canister is filled with activated carbon pellets that can absorb the fuel vapors. When the engine is running, the fuel vapors are purged from the canister and burned in the engine. The vent control valve (solenoid) controls the flow of outside air in and out of the charcoal canister. The vent valve is controlled by the engine computer (PCM). Normally the vent valve is open. It closes when the engine computer tests the EVAP system for leaks. If a leak in the EVAP system is detected, the Check Engine light will illuminate on the dash and the trouble code related to the problem will be stored in the engine computer. When an air leak is present in the EVAP system, the MAP sensor will not be able to determine the air density, and the MAF sensor will not be able to determine the volume of air, entering the engine correctly. This will lead to an over fueling situation or an under fueling situation depending on the size of the air leak and engine operating speeds and load. This may eventually lead to catalytic converter problems as well as misfiring problems. I would recommend having an expert from Your Mechanic come to your location to diagnose and inspect your vehicle.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

How do I turn on or turn off the sound system?

To turn on your sound system, press the Power/Volume button. Press this button a second time to turn off the sound system.

Reverse gear went out

The first step is to check the fluid level and condition. If the transmission is full, and the fluid is not brown or black, we can proceed. The next step would be to try and eliminate an electrical issue that...

Won't engage gears 1994 Ford F250 4WD

Hi - for your "no movement problem" I would first check fuses for the transmission and 4WD controller. Then check the electrical wiring connections both to the transmission and to the 4WD controller. Perhaps the vibration of the railroad crossing...

No code for misfire?

Hi there. It hard to determine, whether the misfire codes and poorly running are related to the work that has been done. The question would be, whether you trust the repair facility enough to take your vehicle back? If the...

humming sound coming from front.

Hello. Thank you for writing in. There are several reasons you may hear a hum that is related to engine speed. Typically these noises are caused by the tires. New tires, thicker treads, all terrain tires, and others similar are...

How do you turn on the high beams?

While your car has low beam headlights that should be used for most driving situations, it also has high beam headlights. These are for use in areas where there is little-to-no oncoming traffic and there are no street lights (such...

How do you use the engine block heater?

If your car is equipped with an engine block heater, it provides you with important benefits for severe cold weather (not all models are equipped with a block heater). The heater keeps the engine coolant warm when the temperature drops...

Code po335

YourMechanic has published an informative FAQ dealing with Trouble Code P0335. Broadly, when Code P0335 sets, it means that there is a fault somewhere in the circuit for the crankshaft position sensor. But, the exact location of the fault has...

Fuel injection issue - 2005 Buick LaCrosse

Hi there. Your vehicle has a sequential fuel injection system. When the computer detects a fault, it converts to port fuel injection (bank to bank/limp mode). The most likely cause could be an electrical short in the odd bank of...

Related articles

A Buyer’s Guide to the 2011 Ford Ranger
The The 2011 Ford Ranger offers affordable pricing with excellent styling. It is a compact pickup that is both inexpensive to operate and own. The vehicle is capable of going off-road while still being able to tow 1,600 to 3,100...
A Buyer’s Guide to the 2012 Ford Fusion Hybrid
The The 2012 Ford Fusion Hybrid is a really great choice for anyone looking for a mid-size sedan. Not only does it boast plenty of room for people and cargo, but it also has a good amount of power and...
The Best Used Cars to Buy If You Have 3 or More Kids
If If you have three or more kids, you could probably get by with a mid-size sedan if all you want to do is take them from Point A to Point B. Realistically, though, having kids means music lessons, athletics,...