Q: Fixed car after Service Engine Soon light came on. It's still not working right

asked by on

I have replaced almost everything in my car, and it's still not working right. The Service Engine Soon light came on, and I was told it was random misfiring. I replaced plugs, wires, etc., already

I can understand how frustrating it can be to replace parts on your car only to have it continue to experience problems. There can be several reasons why your Pontiac has its’ Service Engine Soon Light illuminated. If there is a misfire present after performing a basic tune-up, which includes replacing the spark plugs and ignition wires, then next we need to determine what else could be causing your Pontiac’s problems. I would first start with reading the computer on the vehicle. This is best step towards verifying which codes may be causing the SES light come on. From my experience, it is also possible that your Grand Prix may be having fuel issues, perhaps due to a lack of fuel pressure or a problem with one or more of the fuel injectors. Another common possibility is that the misfire is being caused by internal engine damage, such as a bent valve. With a sensitive issue like this, I find it best to enlist the assistance of a certified mechanic to come out and determine the fixes for your car’s Service Engine Soon Light.

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. Fixed car after Service Engine Soon light came on. It's still not working right

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: Abs tracking lights randomly goes off and on

The ABS will need to be tested to see if you have a problem with one of the wheel sensors. The only way to tell what sensor is having a problem is to have the computer scanned and diagnosed. I...

Q: Car window dropped down into door

Hello! The most common cause of the window falling into the door is the window regulator becoming defective. The door panel must first be removed in order to inspect the pulleys and cables attached to the regulators. Usually the cables...

Q: I have an engine light code P0507. It says that there is a high idle issue with my vehicle.

Hi there. The code P0507 means that the idle air control valve (IAC) is registering a higher rpm than normal. Check all of the vacuum lines to the engine. A small vacuum leak will cause the engine rpm to be...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...
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.