How to Fix obd code p0301?

Answer 1

First P0301 relates to a problem with Cylinder 1 (301, 301=cyl2 303=cyl3 304=cyl4)P0301 can be caused by many of the items identified in the books and on the web. Items such as spart plugs, spark plug wire, Coil tower and/or related ECM. cylinder compression, IntakTPS, MAF, fuel enjector and related intakcomponents, and EGR and items related toexhaust. It is a good idea, regardless of what I'm about to tell you below, to check and make sure everything I mentioned above is in good working order. After spending hours (about 7)assuring the above and ending up very frustratedbecause P0301 reappeared after a few short rides,later that night I got back on the web/internet to search for something new. I came across an append that talked about P0301 and this poor fellow also had4 or 5 other codes. I almost skipped overreading this one because Iassumed there were to many problems and I did not want to chase any more false leads. Being desperate, I read on.In the middle of his append he talked about using a spray product like PB Blaster and spraying it on the intake manifold gasket. If there was a leak the idle/RPMs would change. Becausemy car was running fine (except for the P0301 code) I assumed it couldn't be this, and I read on. Ithen though, wait a minute. This is avery simple test to perform (less than 5 minutes) what the hell, let's do it. Guess what... The idleincreasedabout 300 RPMs then. I repeted the test (sprayed several times) and the idle increased each time I sprayed around Cyl 1 area of the intake gasket. This was the first positive indication of a real problem I found. It took about45 minutestoseperate (not remove) the intake manifold from the cylinder head and sure enough the gasket had a major brake (about 1/8") atCYL 1 intake. I went to my local Advanced Auto, ordereda new gasket and the nextmorning installed it (being very sure to first snug downthe intake nuts and thentorque them downto 14 "inch" pounds in rotation starting from the center and working my way towords both ends. When this was done. P0301 went away andnow (about a month later) the car is running excellent. I drive itevery day and have taken it on one trip of 250 miles out and back (500 miles). So be sureEVERYTING mentioned is in goodorder but BE VERY SURE you don't overlook vacume leaks at the INTAKE MANAFOLD GASKET. It's a simple 5 minute test.