P0300 Diagnostic Code - Random Misfire
Symptoms.
Engine may stumble or miss
Engine may be hard to start
you may notice no issues
Cause
Failing spark plugs or spark plug wires
Bad coil or coil pack
Failing oxygen sensor(s)
Bad fuel injector or more than one
Stuck exhaust valve
Bad catalytic converter
EGR valve or valve passage clogging
Bad camshaft position sensor
Bad PCM or ECM
The Fix
Best first action is a tune up, new plugs, wires, inspect all hoses and wire connections then reset the code. If it returns you will need to narrow it down to a system, coils and coil packs should be tested, catalytic converters for function ( do you smell rotten eggs?). A misfire that jumps cylinders could indicate a lean condition, do you have any other codes along with the 300? this will help clue you in to the source, check valve function to make sure they are opening and closing fully.
This is probably pone of the most difficult codes to troubleshoot, so start with the basics and work your way into the more expensive options, in many cases a good old tune up solves the problem, back it up with a fuel system cleaning and see where you stand.
the code is 1989 cadillac deville and i am not kidding
Just bought my 98 Cadillac deville and has the luck on
the code is 1989 cadillac Devillle and i am not kidding
There is only one way to program a new security code in a Cadillac Deville. In order to do this you will have to go to the dealership and have it done.
Trouble code P0300 means: Random/multiple cylinder misfire detected
There is really only one way to program a new security code in a 2001 Cadillac Deville. The only way to do this is to take it to the dealership.
Trouble code P0300 means:Multiple cylinder misfire detected Trouble code P1320 means:Ignition signal primary circuit fault
p0300 is a multi-cylinder misfire code it is because the logic circuit cannot determine which cylinders because they are random
What is the P39 code for a 1994 Cadillac with a northstar motor
Camshaft Position Sensor...
Intermittant map sensor
for error code answers try the cadillac forums