Q: check engine lit p0300,304,302,306 replace plugs and moved cops to diffirent postions still getting same codes.Change all injector

asked by on

check engine lit. p0300,p0304,po302,p0306 replaced all spark plugs and removed COP to different position installed new injectors. Still getting p0300 and p0304,p0306,p0302

My car has 122000 miles.
My car has an automatic transmission.

I believe all of these cylinders are on the same Bank of the engine. With this in consideration the most likely cause after replacing all of those parts would be a vacuum leak on the intake manifold near that side of the engine. I would recommend having your vehicle smoke tested to determine if smoke comes out of the intake manifold in that area. If so check for cracks in the intake manifold. If no cracks exist simply replace the gasket.

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. check engine lit p0300,304,302,306 replace plugs and moved cops to diffirent postions still getting same codes.Change all injector

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: My all wheel drive light keep going on and off. My abs light stays on.

There could be a wheel speed sensor that could have failed and is not functioning properly that is causing the ABS and AWD lights to come on. The AWD light will come on in the event that the transmission is...

Q: Grinding kind of rusty metal sound when turning left from driver side wheel. Is this a cv or bearing?

What you are describing sounds like a wheel bearing that may be starting to fail. A wheel bearing will usually fail due to pitting or small damage on the surface of the rollers or the bearing race. Both the surface...

Q: Do I need an oil change? 2011 Infiniti EX35 has less than 2000 miles on synthetic last changed 5 yrs ago. 3500 total mileage.

Oil changes are essential to an engines performance and the longevity of an engine's life. I recommend having an oil change either every 4 months or 5500 miles. If your engine oil has been in the engine for more than...

Related articles

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...