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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.
Wiki User
∙ 9y ago
Wiki User
∙ 14y agoTrouble code P0300 means: Multiple Cylinder Misfire
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What does code 300 mean on a 96 Chevy 4.3 vortec?
P0300 = random misfire.
What does a code P0441 mean on a Chrysler 300?
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What does code p0601 mean on a Chrysler 300 2001?
Pcm internal controller failure.
What does a code P0562 mean on a Chrysler 300?
P0562, charging system voltage low.
How do you program a Chrysler 300 key Fob?
The Chrysler 300 key FOB must initially be programmed at the Chrysler dealership. You can use the Chrysler dealership FOB code to change the initial code to your personal code.
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P0300 - Random Misfire . P0300 indicates multiple cylinders are misfiring or the PCM cannot identify which cylinder is misfiring .
What does 2005 Chrysler 300 diagnostic code p0520 mean?
Engine oil pressure sensor circuit malfunction.
What is the engine p0441 mean for a Chrysler 300?
Trouble code P0441 means:Evaporative emission control system incorrect purge flow
What does the exclamation mark light mean on the dashboard in Chrysler 300?
The engine computer has detected a problem with the elctronic throttle system It will have set a code.
What does the exclamation mark symbol on the dash board of a Chrysler 300 mean?
The computer has set a code that will have to do with the electronic throttle system. Have it checked for codes with a scanner.
What does code P0700 mean on a Chrysler 300?
The PCM stores P0700 when it detects a code stored in the tcm. You need to check the transmission computer with a scan tool to know possible causes.
What is the make and model of a Chrysler 300?
The make is Chrysler and the model is a 300.The make is Chrysler and the model is a 300.
