Question about 2002 Chevrolet Silverado 2500HD
Just changed plugs an wires
They are known for the 02 sensors going bad. you will need to have the computer scanned to see for sure.
Posted on Dec 06, 2012
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Posted on Jan 02, 2017
Aveos had a service bullatin for some 04 and 05 models. Bad valves, had to have head reworked and solved problem. took car to 3 chevy dealers to find problem..
Posted on Feb 25, 2010
Well, I've seen .060 and .035 on Chevies before, but not .040. Call Auto Zone. Tell them what year, make, model, and engine you have. If they tell you it is .040 then I am lost.
Posted on Mar 23, 2010
SOURCE: I have a 2002 Chevy
Basically this means that the the car's computer has
detected that not all
of the engine's cylinders are firing properly.
A P0300 diagnostic code indicates a random or multiple misfire. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. A P0302 code, for example, would tell you cylinder number two is misfiring. Unfortunately, a P0300 doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why.
Symptoms may include:
A code P0300 may mean that one or more of the following has happened:
If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.
Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.
Posted on May 27, 2010
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