Q: Engine misfiring in a 2002 Pontiac Montana

asked by on

I have an engine misfire and get Check Engine codes P0300, P0203, and P0204.

A misfire could be caused by number of problems but since you are getting the p0204 and p0203 I believe that is is probably an injector that is causing the misfire. I would replace the injector for the number 3 and the number 4 cylinder and see if that fixes your problem. A mechanic with YourMechanic can assist you with that if you don’t feel comfortable.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
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. Engine misfiring in a 2002 Pontiac Montana

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: Auto trans replacement

Hi Bill. Thanks for submitting your question here on YourMechanic.com. Unfortunately, since we don't offer non-OEM part upgrades or transmission swaps like you're looking for, we're unable to provide you with the right info that perhaps you are seeking. I...

Q: My car is not starting and does not make any noises while attempting to start

Hello there. A few problems can cause the vehicle to have a crank no start and they are all electrical. The most likely cause of the vehicle not starting is the battery. After the battery, the starter,...

Q: Gas pedal pressed to floor before car accelerates

Hello, we will be happy to assist you. I would suggest that you have a technician use a capable scan tool to perform a function test on the vehicle. Doing so will test most of the sensors on the vehicle...

Related articles

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.