Q: Can a exhaust leak trigger service engine light

asked by on

Can an exhaust leak trigger service engine light

My car has 16100 miles.
My car has an automatic transmission.

An exhaust leak can trigger a Check Engine Light due to the fact that depending on the location of the leak, the leak itself is introducing more oxygen into the exhaust gases. As you may know the oxygen sensors which are part of your emissions system read exhaust gases to determine whether or not the appropriate amount of oxygen is present in the exhaust. Based upon this reading, this information is relayed to the car’s ECU which then makes a determination as to whether or not to add more or less fuel to the engine. When too much oxygen is present due to the exhaust leak, this will cause Check Engine Light to come on. I would suggest having an expert from YourMechanic come to your home to take a look at your exhaust leak and diagnose the Check Engine Light to determine a solution and repair.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Can a exhaust leak trigger service engine light

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

Get a quote

What others are asking

Q: Should I idle my car if I do not use it that frequently?

Hi. The worst thing you can do is not drive it at all. By you driving the suv once a week should help you maintain the battery and keep the car in good running condition. If you drove it a...

Q: I need an upstream O2 sensor replaced, I am going to purchase the part, I just need to make sure it is the right one

Most if not all O2 sensors look very similar and may work different internally. Unless you are getting an O2 sensor from the manufacturer dealer for your exact application we would not be able to know if you get the...

Q: Car vibrating when its 40 miles and check engine light is on

The only real solution is to have diagnostics run to find out why the Check Engine Light is on. There are dozens of sensors between the engine, transmission, traction and anti-lock system that could be causing the poor performance. Even...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.