🌔 Jeep Grand Cherokee Code P0300

Either one or sometimes multiple misfiring codes (P0300 / P0301 / P0303 / P0305). I tried buying new coil and plugs for the ones misfiring but same thing. Drives good for 20 -75 miles, then misfire code. Ive taken this to 3 mechanics so far and have not been able to pinpoint the problem. Ive tried replace O2 sensors, replaced ECU computer, leak 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. 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. What is the Cost to Diagnose the Code P0302 Jeep? Labor: 1.0. The cost to diagnose the P0302 Jeep code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour. 5366 posts · Joined 2010. #1 · Dec 28, 2012. P0300, P0355 & P0339 with stumbling? I'm getting codes P0300, P0335 and P0339. I had to try and start the vehicle two or three times, and it won't rev passed 2500rpm or so (somewhere around there). It just stumbles or rev-limits and won't let it pass that RPM, in neutral or in gear, or in gear with Ram Year. 2004. Engine. Hemi 5.7. I just got this P0300 code 2 days ago (the first time was 3 months ago and they said I needed new plugs so I got it done and CEL disapeared until 3 days ago). Today on a cold start she runs OK for 2-3 minutes and then wham! it runs like crap. 3 days ago it started running very bad while I was 50 miles from home P0300, P0301, P0306 codes. I own a 2002 Jeep Grand Cherokee Laredo 4.0. The past two years I have been dealing with these same codes, I have done a complete tune up, fuel system clean out, and fuel pump. I took my Jeep to a mechanic to get the fuel system cleaned out and he stated that if that did not work then I would have to replace my fuel The bad heads were on bank 2. The code the OP has is on bank 1. There is quite a bit of troubleshooting to do before buying parts. Things like looking for loose connections, chafed or broken wires, looking for proper signals from the cam and crank sensors with a lab scope, looking at the tone wheels for the sensors, loose or improperly mounted sensors, etc. What does this mean? Code P0300 Jeep Tech Notes The P0300 code means that a cylinder (s) is misfiring or is randomly misfiring. Start by checking for intake leaks, intake gaskets are common caused of multi-cylinder misfiring. If no leak are found the next step is to replace the spark plugs. What Codes Will This Page Cover? P0300 Random/Multiple Cylinder Misfire Detected. P0301 Cylinder 1 Misfire Detected. P0302 Cylinder 2 Misfire Detected. P0303 Cylinder 3 Misfire Detected. P0304 P2098 can’t resolve this code. I have a 2014 Grand Cherokee with the 3.6 petrol, I have a check engine light for a p2098, I have done everything, had smoke tests done on the exhaust and intake, I’ve change o2 sensors I’ve replaced all the seals on the intake, the smoke tests came back with no leaks what so ever, the only thing I haven’t The P0305 trouble code will trigger the Grand Cherokee’s service engine soon light. The vehicle itself may begin to run rough. It depends on how serious the misfire is. The vehicle may produce excess vibration, especially at lower RPM. Fuel mileage may suffer. You may smell raw gas coming from the tailpipe. .

jeep grand cherokee code p0300