Questions tagged [p0301]

The P0301 is a Diagnostic Trouble Code (DTC) for "Cylinder #1 Misfire" from a vehicle's On-Board Diagnostics-II (OBD-II) system. Also include tags for your vehicle's make and model. If your question also relates to OBD-II scan tools, include the obd-ii tag too.

The p0301 tag is for questions regarding the OBD-II DTC code P0301 which is for "Cylinder #1 Misfire" but can be caused by a variety of causes, incluing

Spark plug, plug wiring, or coil pack problems
Throttle body or fuel injector dirty
Poor compression

There is a generic DTC P0300 for random or multiple cylinders, and codes for each cylinder from 1 through 12.

Astra MK6 - when warm, rough idle and shudders while accelerating

Here's a video: https://youtu.be/wYyaW9wRt6U For a couple of months now my car has had a rough idle and shudders while accelerating - Vauxhall Astra J Exclusiv MK6, 4 years old 61k miles spark plugs done last year. It starts off shuddering if I…

rough-idle misfire vauxhall astra p0301

asked Dec 24 '16 at 15:08

codaamok

votes

1 answer

Smog test fail, lack of oil?

I have a 2001 Toyota Corolla. It failed a smog test and it misfires. It has a code that the vehicle repair shop doesn't recognize, could this be because of lack of oil in my car? My stepson has never checked the oil and unfortunately I recently…

toyota corolla emissions p0300 p0301

asked Nov 17 '16 at 20:13

Susan A Peterson

vote

1 answer

Rough idle or slight miss at idle in relation to purge valve

I'm working on a 2006 Chrysler 300, with the 2.7L v6 (the internal water pump one). I just replaced the EGR valve due to a P0404 and surging while driving (verified with a scan tool the EGR valve would stick), while I had the intake manifold off I…

rough-idle chrysler egr chrysler-300 p0301

asked Mar 22 '20 at 01:52

David Scheiber