Question about 2003 Pontiac Bonneville
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Posted on Jan 02, 2017
It is located under the water pump. Make sure when you remove the sensor that you rotate the crank shaft and look in the hole to make sure the pick up magnet is still in there. Sometimes they come loose and cause a no start or long crank. You will need to have the code cleared still.
Posted on May 06, 2009
the code you have is for a misfire on #3 cylinder. (im sure you knew this right?). the crankshaft position sensor will not cause one individual cylinder to misfire. what i typicaly do in this scenario is switch the ignition wire off of the guilty cylinder onto a known good firing cylinder and see if misfire moves to the other cylinder. i repeat this process by switching the spark plug and finaly the fuel injector. a compression check may be in order as well (but not a likely cause) unless you have access to a tech 2 (gms diag computer) you will need to clear this code after each component is moved and see if you get a new code ie :p0304 if switched to #4 cylinder..other wise if you do have access to a computer that has a misfire chart in its features you can quickly identify the guilty component. as i side note the ignition coil may also be faulty, but i believe your vehicle has a 3.8liter meaning that it has a coil pack....switch the others i listed and see ow you make out....good luck!
Posted on Jun 11, 2009
SOURCE: Engine Performance problem
Clean the Mass Flow sensor. It is probably a black module with wires on the side of the throttle body. There are a few ways to do this, but I suggest buying a can of spray designed for this purpose from your local parts store (electrical spray or MAF spray).
Be careful not to break the little wire. It costs a few hundred bucks to replace.
Posted on Jun 29, 2009
SOURCE: Check engine code
either the crankshaft sensor is defective or the wiring harness or connector to it are damaged, most likey you can just replace the sensor. the sensor is near the crank pulley front of engine.
Posted on Jul 26, 2009
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