Question about Chevrolet Suburban
I bought a 1999 Chevrolet Suburban approximately 2 months ago. Since then we had noticed it dragged when accelerating and didn't shift smoothly. Took it to the shop where they said it needed a major tune up, costing $850. A couple of weeks later I started the vehicle and it died, electronically speaking, everything went dead. They found that the battery cables were actually burned, replacing them cost $400. Now the service engine light is coming on. I took it to Checker Auto and had them run the diagnostic on it. Code came back as P0303, the guy who checked it said that means that cylinder 3 is misfiring. What could be the cause of this and how do I check it to find out what it would be?
P0300 is a multiple cylinder misfire and is used by all OBD2 vehicles on the road in the USA that is 1996 and newer, P0301 is cylinder number 1..P0302 is # 2 and so on...that tune up may have been needed and parts and labor are expensive..you have a cylinder that is misfiring and the cause must be located..possible causes are intake manifold air leaks..secondary ignition problems..fuel injectors..plugged EGR system if it has one..failed head gasket..burned or cracked valves..I have seen some crazy stuff..you need a tech on that one not a mechanic.
Posted on Sep 10, 2009
A DTC code P0303 applies to a 6.5L diesel engine.A proper misfire code for gas engine will be a P0300.
I think you need to return to the shop that did the work for you. Most places give a 12 month, 12,000 mile warranty.
This is how my GM diagnostic chart reads when I look up a P0303 DTC.
Engine Controls - 6.5L
Posted on Sep 07, 2009
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Posted on Jan 02, 2017
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