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?
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: 2003 pontiac,montana wont shift out of first when engine gets warm

If transmission will not shift only when it gets warm and shifts perfect when cold then the problem may be in one of the sensors and would require the computer scanned for codes to see if vehicle is going into...

Q: Q: Shifter

Yes, it is possible the loose shifter is a consequence of the ignition switch breaking as there is an interlock between the two. The recall relates to the ignition switch not retaining the key in the run position, thus potentially...

Q: Squealing when decelerating

Hello. Thanks for writing in about your 2000 Porsche Boxster. Most of the time this is caused by the pilot bearing in the rear of the crankshaft. When it fails it will make this noise at these times. I usually...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...