Q: Q: Check Engine light is on

asked by on

The Check Engine light is on on my car's dash. We already read the code, and found that it is a misfire code. We've changed the spark plugs, the coil pack, the coil's themselves, the fuel injectors, everything that has to do with a misfire! The car NOW runs soomthly, but the code keeps showing up. Is this a faulty wire or something? How do I get rid of the Check Engine light for good on the misfire code? If I erase it, after a while, it shows up again!!

My car has 174570 miles.
My car has an automatic transmission.

Hello, thank you for writing in. The work you have put in thus far is only benefiting your car, but misfires can be a lot trickier than most think. You may be having a low fuel pressure issue, dirty MAF sensor, dirty throttle body, EGR valve issues, or a vacuum leak (just to name a few). You can clean the MAF sensor and throttle body to help eliminate those components. You may also want to measure the fuel pressure at the engine with a fuel pressure gauge. Low fuel pressure will either be an issue with the pump or a clogged fuel filter. For more help with testing, contact our service department to schedule an appointment.

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. Q: Check Engine light is on

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: i put new plugs an wires an fuel filter an i am still getting a miss jerking an lost of power my engine light has never came on.

I recommend having a mechanic come and look at the vehicle to check for vacuum leaks or coil problems. You may need to replace the coil pack and ignition module. These older engines may not register misfires as well as...

Q: Q: Overheating

Hi there. I would highly recommend completing a full coolant system flush first; as it's possible that you might have a few air bubbles stuck inside the cooling lines that can cause the type of overheating issue you're describing. It's...

Q: my 2012 ford fusion today the wrench sysbol came on saying throttle control/transmission fault detected why?

Hello Mr. Donald, thank you for writing in. The wrench is another form of a check engine light. When the computer detects there is something wrong (as it is constantly running tests) it will set a "diagnostic troubleshooting code" that...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...