Question about 2005 Chevrolet Silverado 2500HD 2WD

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Reason for fault p0303, p0306.

Computer showing fault p0303, p0306,

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  • Anonymous Mar 23, 2014

    showing the faults p0303, p0306 when connected to computer.

  • Anonymous Mar 23, 2014

    the Chevy Silverado turbo diesel is producing white smoke and kranking voice. so I connected to computer and say's fault po303, p0306, p0300.

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Cylinder 3 and 6 misfire thanks for all the info really helps me help you lol

could be plugs coil injector pcm cylinder dmg wiring etc

start by swappin coils n see if problem follows coil or stays in same cylinder

Posted on Mar 19, 2014

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Car sputtering badly. Codes P303 n P102 show on diagnostics and have replaced both parts associated with these codes,PLUS, new fuel filter, engine still sputtering badly.


Hi,

I hope I can help with this. This could mean the engine spark plugs or plug is the issue. Also check the exhaust pipe. White smoke indicates a coolant issue. Check your coolant reservoir. Black smoke indicates a Fuel issue. Blue is an oil issue. Also, speaking of your spark plugs there very well could be a misfire.

the code P303 could be cylinder 3 misfire
P102 the mass air flow sensor which is on the air filter cover. It's an electrical part and is sensor. Please check these and let me know.

Jul 28, 2016 | Cars & Trucks

1 Answer

Fault p0303, p0300, p0306


Those codes are all misfire codes. you have misfires in cyl 3 and 6. the 300 means multiple cylinder misfire. Id first start by checking your coils plugs and wires.

Mar 18, 2014 | Kia Amanti Cars & Trucks

1 Answer

I have a 2007 ford taurus with p0300-p0303, p0306, p0316, p2195 and p2196. engine doesnt start anymore but battery is fine.


The old give me money for nothing statement from a mechanic instead of knowing how to fix it.
code p0300 refers to random/ multiple cylinder/s misfire detected===causes--spark plug/s---HT lead/s---injector/s---ignition coil/s--low compression--wiring
code po303 refers to cylinder 3 misfire detected--- engine mechanical fault---wiring---ignition/ fuel system---injector --ECT/MAF sensor --- ECM
code p0306 refers to cylinder 6 misfire detected===causes --engine mechanical fault---wiring---ignition / fuel system---injector ---ECT/MAF sensor---ECM
code po316 refers to misfire detected during start up--first 1000 revs==causes--engine mechanical fault---wiring---ignition /fuel system---injector
code po2195 refers to heated oxygen sensor (HO2S) 1 bank 1 signal stuck lean===cayses ---HO2S---fuel pressure---injectors---intake leak
it also refers to O2S sensor 1 bank 1 same causes and also refers to HO2S 1 bank 1 implausible signal===causes --- short to positive---short to ground---Ho2S ---ECM
code po2196 refers to the same items as 2195 . some causes are also air intake restricted
Have a compression test done some where else and it will indicate the condition of the motor. The rest is sensors and wiring problems.

Jan 05, 2014 | Cars & Trucks

1 Answer

What does code p0303 and p0306 mean on my 01 ford f250 superduty xl


This would mean the #3 cylinder and the #6 cylinder are misfiring. There are several potential reasons including bad coil-paks or sparkplug wiring, coils on plugs(new style), crankshaft sensors, or shorting fuel injectors.

Some problems may be visually seen if the engine compartment is open in a dark place and sparks jump. Or the sparkplugs on the cylinders mentioned could be bad.

Apr 07, 2013 | 2001 Ford F Super Duty Chassis Cab

1 Answer

What does a code p0303 and p0306 mean on my 2001 ford f250 sd


Your local parts store will most likely read your error codes for free. Did the temp light come on or did it overheat

Apr 07, 2013 | Cars & Trucks

1 Answer

Piston 3 and 6 are misfiring the jeep shakes and doesnt accelerate well


Code P0303 and P0306...

A code P0303 and P0306 may mean that one or more of the following has happened:
  • Faulty spark plug or wire
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Running out of fuel
  • Poor compression
  • Defective computer

Possible Solutions: If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
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.


Hope helps.

May 03, 2011 | 2002 Jeep Grand Cherokee

1 Answer

Codes:p1346/p1349/p1354/p0446/p0300/p0301/p0303/p0305/p0307/ p0430/car runs rough when idling/lexus gs 400 1998


P0301 Cylinder No. 1 Misfire Detected
P0302 Cylinder No. 2 Misfire Detected
P0303 Cylinder No. 3 Misfire Detected
P0304 Cylinder No. 4 Misfire Detected
P0305 Cylinder No. 5 Misfire Detected
P0306 Cylinder No. 6 Misfire Detected
P1346 Variable Valve Timing (VVT) Circuit Range/Performance Fault
P1349 Variable Valve Timing (VVT) System Malfunction
P0330 Knock Sensor
P0446 EVAP Vent Control Fault
P0430 Catalyst System

Stop driving immediately.....

You defiantly skipped on your timing........

Feb 14, 2011 | 1998 Lexus Gs 400

1 Answer

Can't pass smog! OBD codes P0303 & P0306, what's my best bet?


SINCE RECOMMENDED TO CHAGE THE PLUGS, WIRES, AND COILS? HAVE YOU DONE SO? OR EVER?

Apr 28, 2009 | 1997 Toyota 4Runner

1 Answer

99 Windstar has no power with OBD codes of P0303, 0305 & 0306


There's a number of other things it could be. Faulty O2 sensor(s), faulty fuel injector(s), failed catalytic converter, poor compression, etc. These articles ought to help - P0303 - P0305 - P0306

Dec 15, 2008 | 1999 Ford Windstar

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