Question about 2007 GMC Sierra 1500

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Engine code p0307 miss fire cylinder 7 ? looking for possible other problems. transmission shifting hard at the same time this code appeared.

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A code P0300 may mean that one or more of the following has happened:

  • Faulty spark plugs or wires
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector(s)
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Stuck/blocked EGR valve / passages
  • Faulty camshaft position sensor
  • 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.
Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak
in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.

Posted on Jan 31, 2010

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3 Answers

2000 Jeep Grand Cherokee Laredo 4.7 liter code reads p0307 turn the car off when I turn it back on started misfiring and sputtering and wont stay started now help


code p 0307 is misfiring on no 7 cylinder ====causes --- engine mechanical fault ---wiring---ignition/ fuel system--injector --ECT/MAF sensor---ECM
look for low fuel pressure or ignition control module

May 31, 2016 | 2000 Jeep Grand Cherokee Laredo

1 Answer

I have a Infiniti q45 the secondary throttle position sensor code,bank 1 knock sensor Circuit malfunction cylinder 7 miss fire codes could all them be related to my tcs off and slip lights being on


yes these warning light will be on due to the codes set. fix the p0307 1st, move the number 7 coil to an other position to see if a different code sets. the knock code is not an mil item,

Apr 23, 2016 | Infiniti Cars & Trucks

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I have a 97 Dodge Ram 1500 with a 5/9 in it I put plug wires on it and now it's popping and it lost power and it had a code po302 and Po 307


The P0302 code means that the cylinder 2 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 2. If the problem persist more tests needs to be done. PO307 is the same thing except number 7 cylinder. Possible symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Lack/loss of power
- Hard start
- Engine hesitation

Nov 29, 2015 | Dodge Cars & Trucks

1 Answer

Can code P1151 cause code P0307


I doubt it.
Code 1151 is for the lack of switching on the O2 sensor on bank two. The sensor appears to show bank two is too lean but there could be other issues.
Code 307 is for a miss on cylinder 7 which could be fuel or ignition related. The problem causing code 307 could affect code 1151 if cylinder 7 is on the opposite side of cylinder 1.

Aug 30, 2013 | 2003 Ford Mustang

1 Answer

When runing engine has missfire on #1 and#7 cly At ilder or highway speed some time it run with no probem but back fire throw intake and set codes.


DTC P0301 & P0307 Code - Cylinder #1 & #7 Misfire Detected
A P0301 (also P0307) 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 (also cyl #7).

Symptoms may include the engine may be harder to start, the engine may stumble / stumble, and/or hesitate or other symptoms may also be present. Other tips to solve it in the previous fault code link.

A code P0301 and P0307 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

Hope this helps and just keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

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Oct 31, 2011 | 1999 Dodge Ram

1 Answer

Missing, running very rough at idle-very low idle. Engine codes P0011, P0022, P0171, P0300, P0305, P0307, P0316, P2198.


the P0011 and P0022 are the camshaft sensors (both sides) are over advanced--common problem on Fords, and is usually a defective VCT solenoid (variable cam timing solenoid)-it will cause your other codes (P0300 random misfire), P0305 (#5 cylinder), P0307 (#7), P0316 (misfire at startup)-P0171 is a lean condition on side 1, where #1 plug is located (look for a vacuum leak, but a faulty VCT could also cause this)-is there any chance the last oil change set this off? The proper viscosity is very important and may have caused these codes.

The P2198 is O2 sensor signal stuck rich bank 2 sensor 1. Has the engine or sensors recently gotten a bath in oil (seafoam?)-this code indicates something of possibly an over zealous maintenance procedure could have damaged maybe the MAP sensor, or more.... Unfortunately, you have a lot of company. At least you didn't crack a piston or hydrolock the engine. Seafoam is pale oil, naptha, and alcohol. With more detail there should be a reason for all those somewhat related codes-post more information.

Jan 26, 2011 | 2004 Ford F150

1 Answer

Code p0307 need firing order


http://repairpal.com/OBD-II-Code-P0307

Misfire detected in #7 cylinder.

It could be caused by several things as outlined in the web page above.

Jan 21, 2011 | 2010 Land Rover Range Rover Sport

2 Answers

What are codes p0307 and p0138 on dodge ram 2500 mean


P0138 (M). O2 Sensor Circuit High Voltage (Bank 1 Sensor 2) ..... P0307 (M). Cylinder # 7 Misfire. Misfire detected in Cylinder # 7.

Mar 19, 2010 | 2001 Dodge Ram 2500 Truck

1 Answer

My engine light is on, codes show P0307 and P1740 the truck runs fine and the a/c blower goes from vent to defrost when I accelerate and back again when i let off the gas and cruise


A P0307 code means that the the car's computer has detected that one of the engines
cylinders is not firing properly. In this case it's cylinder #7.


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 P0307 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
  • Poor compression
  • Defective computer

Jul 15, 2009 | 2001 Dodge Ram 1500 Truck 2WD

2 Answers

1996 f150 5.0L misfire code


P0307 Code - Cylinder #7 Misfire Technical Description Cylinder #7 Misfire Detected
What does that mean? A P0307 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 #7.
copyscape.gif SymptomsSymptoms may include:
  • the engine may be harder to start
  • the engine may stumble / stumble, and/or hesitate
  • other symptoms may also be present
Causes A code P0307 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

Jan 14, 2009 | 1996 Ford F150 Regular Cab

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