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Old 08-12-2018, 09:56 PM   #1
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Check engine

We have 1,500 miles on out Mercedes 3.0 and Check engine light came on
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Old 08-12-2018, 11:39 PM   #2
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Bring it it over to AutoZone or one of the chain type autoparts stores. Most will read the codes from the OBDII port and let you know what the code is.
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Old 08-13-2018, 01:23 PM   #3
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Or stop by a MB dealer. 3,000 miles is all warranty work. I don't trust the yahoos at the auto parts stores to touch my stuff anyway...
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Old 08-13-2018, 02:01 PM   #4
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1500 miles

Probably a loose fuel cap. Unscrew and re-close the fuel cap and the problem may go away after a few starts.
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Old 08-13-2018, 02:30 PM   #5
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loose cap, or you may have let your DEF run too low... easy fix..... probably : /
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Old 08-19-2018, 01:00 AM   #6
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When the Engine Check Light came on our new 2017 Thor Freedom Elite, I could not detect any difference in performance with 2017 Ford E450.

My concern was not knowing if the problem was serious or not.

It took some time to make an appointment with an authorized Ford mechanic for the warranty service. They could not replicate the problem or come up with a possible solution.

The error code was P0300 Random/Multiple Cylinder Misfire Detected.

After doing some research on the Internet, I ordered a KOBRA Wireless OBD2 Car Code Reader from Amazon and purchased OBD Fusion for my iPhone. (The OBD Fusion is the software that will retrieve the code.)

Using my iPhone, I was able to access the code and determine it was the same problem the RV mechanic found.


After the third incident in about 5,000 miles, I decided to use Rislone Gas Fuel System Treatment to help eliminate possible water or moisture in the fuel tank. (Only time will tell if this makes any difference.)


Joe G. Rodriguez
2017 Freedom Elite Model FE22

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Old 08-19-2018, 01:25 AM   #7
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An OBD2 reader is a useful tool to have. In my first 8000 miles on my 2016 V-10 in my Axis, I had the engine light come on three times - always in high humidity conditions and after a heavy rain. The OBD2 gave me the same code for a CO2 sensor - and allowed me to zero out the engine light. It hasnít happened in the last 16000 miles. I also have used the OBD2 to check and reset the engine check light in my Miata. Great peace of mind and time saver on the road or, if it continues to happen, that something really is wrong and needs to be looked at.
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Old 12-08-2019, 02:20 PM   #8
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Hello everyone need some help I have a 2014 and class C 31l freedom elite and the other day my check engine light came on for a code reader on it and it said that had a random misfire cylinder six and nine so i installed
new coils and plugs it still didnít clearly the problem so I went with the next thing so I changed out fuel injectors for cylinder six and I still have a same errors problem is the engine runs great but every once a while it will pick up a misfire and then Iíll get the same codes donít know where to go next can anyone give me suggestions
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Old 12-08-2019, 02:40 PM   #9
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Who told you what parts to change?
You can't parts cannon a misfire.
It could just as well be a milli volt problem as it is a mechanical problem.
Injection cleaner cures my injector problem every time, about 10,000 miles...light...3 bucks worth of injection cleaner... 10,000 miles.
Mine is a v6 with an inherent but rare(ish) spider problem. I could change injectors but it really isn't the injector. It's a build up in the spider.

What does a v10 specific forum say about it?
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Old 12-08-2019, 02:43 PM   #10
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I did as troubleshooting the misfire had 60,000 miles on my RV so I figured it was time for plugs anyway I did go ahead and put some injector cleaner in the in the tank see what happens but so far nothing happened course I havenít driven it very far since then
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Old 12-09-2019, 08:14 PM   #11
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I have a Thor Axis 24.1 2016. Can someone tell me exactly where the OBDII port is?? I have a gas cap icon set and I checked and closed the gas cap and it looks OK. I wanted to reset it and see if it comes on again.

Thanks
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Old 12-09-2019, 08:17 PM   #12
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It could reset itself in a few starts and miles if it was indeed the gas cap.


There's equipment to buy and many steps and a bit of knowledge between 'where's the obd" and clearing a code.
If the code doesn't go away I suggest a mechanic.
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Old 12-09-2019, 08:57 PM   #13
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Quote:
Originally Posted by Sli22sli View Post
I have a Thor Axis 24.1 2016. Can someone tell me exactly where the OBDII port is?? I have a gas cap icon set and I checked and closed the gas cap and it looks OK. I wanted to reset it and see if it comes on again.

Thanks
In my 2016 Axis 24.1 the rectangular port is right next to the steering column below the plastic piece which hangs down. A mechanic told me my code should reset, but it never did. It is worth a try if it does not reset by itself.
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Old 12-23-2019, 06:17 PM   #14
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Experience has taught me the following:
If you pull the engine battery disconnect (right above the accelerator pedal) without waiting the 10 minutes, as it says on the label, the ECM does not shut down properly. The next time you start the engine. The Check Engine light will come on and stay on. Shutting off the ignition, and back on again does not reset it. I shut off the engine, waited 10-15 minutes, disconnected the chassis battery, reconnected, started the engine, Check engine light was out.

Follow the directions on the label and ALWAYS wait at least 10 minutes before pulling the chassis battery disconnect.

IMO, and might be wrong, but I don't think the fuel cap being loose, affects diesels like gas engines, because there isn't an evaporative vapor recovery system. Diesel fuel is much less volatile than gas.
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Old 12-30-2019, 10:09 PM   #15
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Originally Posted by bjones3211 View Post
I did as troubleshooting the misfire had 60,000 miles on my RV so I figured it was time for plugs anyway I did go ahead and put some injector cleaner in the in the tank see what happens but so far nothing happened course I havenít driven it very far since then


I need more help now
the fuel injector cleaner didnít fix my problem now I have a new problem my RV is stuck in Defuniak Springs Florida I cannot find a certified mechanic to help me The RV places only work on the house portion of the motorhome and it seems like the ford dealerships says they canít work on RVs so how do you find out who can work on them or is there anybody in that area that has a suggestion
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Old 12-30-2019, 11:09 PM   #16
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Sorry currently my RV is parked at my sons house it has the same problem and it has a misfire it has a code P300 P306 and 309 I drove it from Macon Georgia down to defuniak Springs and it didnít do real well driving it there and it was suggested not to try to drive it back so Iíve been trying to find a mechanic to check it out for me
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Old 12-30-2019, 11:41 PM   #17
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THOR #7035
There is a thread on here called "Ford Dealers" I believe that has the answer to your question about how to find a Service Dealer for your coach.
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