The P0300 went away but then it started throwing the code for Cylinder #5 Misfire. I replaced the almost new Bosch plugs with Champions, problem solved. '97 ZJ Laredo 4.0

CODE P0340 P0365 CAMSHAFT POSITION CMP SENSOR CIRCUIT BANK 1 SENSOR 1 SENSOR 2 DODGE JEEP CHRYSLERIf you have a Dodge, Chrysler, Jeep, or Fiat and you have e

The codes it pulled from that were P0300 multiple misfire and P0152 Bank 2 position 1 O2 sensor high voltage. I added some displays to the Torque app to look at my O2 voltages and found this - O2 bank 2 position 2 is at 0.0V and bank 1 is at 1.3V. The bank 1 sensors are right at 0.85 ish volts.
Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST. P0306 code definition Cylinder 6 Misfire Detected What the P0306 code means P0306 is an OBD-II generic code that the engine control module (ECM) detected a misfire on cylinder number 6 of the engine.
I have an 09 Gr Cherokee with a 4.7, with about 78k miles on it. Both sets of plugs (upper and lower) were changed with same brand and part number that was in it before. About 100 miles later, car began to miss, check engine light flashing. Code P0300 was a pending code.
P0300-P0302-P0304 all at the same time? 2004 GC 4.7L 87k miles. Stock. Ran perfectly before. Tonight after work started the the WJ and it misfired for 30 sec then ran ok. Had to go to the bank. Restart the engine again misfires for about 30 sec. Went to the groceries afterward. Started the engine, misfired for 30 sec, then check engine came on.
Received 88 Likes on 77 Posts. Year: 1999. Model: Cherokee. Engine: 4.0. P0300 is a code for "random / multiple cylinder misfire". Because a particular cylinder isn't noted in the code, the first thing I check for this code are things that are " common " to all the cylinders. And that starts with fuel pressure.
There are quite a few things that can go wrong with the camshaft and crankshaft that result in the setting of a diagnostic trouble code (DTC). The DTC P0018 is one of the trouble codes that indicate an issue with the relationship between the camshaft and crankshaft. Find out more about this trouble code with this informative guide.
P0300 Random misfire P0339 Cranshaft Position Sensor P0455 EVAP System Large Leak P0456 EVAP System Small Leak P0016/P0300/P0339 are all related and could be the crankshaft position sensor. It could also be the camshaft sensor or a wiring/connector issue. P0455/P0456 are related possibly bad gas cap
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    • jeep grand cherokee code p0300