Question about Cars & Trucks
P0301 Code - Cylinder #1 Misfire Detected
A P0301 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #1.
Symptoms may include:
the engine may be harder to start
the engine may stumble / stumble, and/or hesitate
other symptoms may also be present
A code P0301 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
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.
Same procedure to test and check other cylinders on misfire condition.
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Posted on Feb 15, 2012
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Posted on Jan 02, 2017
SOURCE: missfire #1
Might be a sticking valve. If they stick, then they usually do it when the engine is cold. Hook up a vacuum gauge, then start the engine cold: if the needle bounces during the misfire, then suspect an intake valve is sticking.
Posted on May 05, 2009
Sensor is located passenger side of the intake and mounts facing the firewall .It takes a torx bit to remove .NOT a philips as screw is hard to see from the front.I use a bit with a 1/4 in socket as a full size screwdriver will not fit.Remove screw and use a set of pliers to twist and pull back.
Posted on Mar 24, 2010
SOURCE: I have a 2004 Chrysler Pacifica
that would be your HO2 sensor. It's located in the left hand exhaust manifold closer to the top of the engine. It usually takes a special socket to remove one. If you have any doubt, take it to a shop and have them replace it for you. This sensor effects fuel and driveability, don't go to long without fixing it as it may cause damage to your catalytic convertors.
Posted on May 31, 2010
SOURCE: where is the alternator located
The alternator is hiding under the engine cover. You must remove the engine cover if you have one. Locate the power steering fluid resevior. The alternator is right behind it.
Posted on Oct 25, 2010
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