I have a 02' mini cooper and i have a problem with cylinder 1 misfiring and then the car going in to limp mode. This only happens to the car if it is at idle. If the car is on the road it does not go into limp mode, it may still be missing but if it is it is not noticable. The p0301 is a constant code and the p0313 ive only recieved once. I have replaced plugs (Bosch Iridiums), plug wires (oem), and Coil (screamin demon). I have also filled up with high test and seafoam. I have not moved injector #1 yet to see if mis moves with the injector but any help would be greatly appriciated. Thanks for the input in advance.

 

Generic P0301 issues...

P0301 Code - Cylinder #1 Misfire

Technical Description

Cylinder #1 Misfire Detected
What does that mean?

A P0301 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.
Symptoms

Symptoms 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 P0301 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 fuel injectors.

 

Check the plugs and make sure you put the connectors back snug. How many miles on this 02 model? OEM wires with Demon coil??? Maybe #1 wire bad???

 

Should i have put after market wire on with the deamon coil. I do not understand what they will do for me that makes a difference. Please explain.

 

We have an 02 that is doing the same thing with both of those codes. I did all of the swaps, wires, coil, plugs and just swapped injectors. I am going to see if the code will jump to #2. I also get both codes. Does your check engine light flash first? Does your DSC light come on too? Does the car run fine after a restart? Does your exhaust smell bad after the light comes on? Did you ever get this resolved?

 

You may want to do a compression check. I have the same symptoms as you and it was not good.

 

this is what i have determined. There is a problem with the rings in #1 and it is probably the oiler ring because i have 140 psi compression in that cylinder. I have located a block. I will be building building it to go in and as soon as i pull that bad engine down and find out what he problem is for certain i will let you all know

 

What's the compression in the other three cylinders? The rule of thumb is that all cylinders are within 10% of each other rather than a specific number. Is the plug in #2 fouled? Another quick check is to swap the injector with one of the other cylinders to see if the problem follows the injector. You can also do that with the spark plug and with the spark plug wires. That way you can eliminate possible causes and narrow it down to a more reasonable area to check. An "Occam's Razor" for automotive diagnostics more or less.
-skip-

 

Start with a compression check, i suspect something mechanical. the gen 1 mini uses one coil to fire two plugs, therefore if a coil or wire was the problem there would also be a code for the companion cylinder. If the compression test reveals a mechanical problem follow up with a leak down test....pressurize the cylinder with air after bringing it up to TDC....listen for air leaking into the intake manifold (bad intake valve) or air leaking into the exhaust pipe (bad exhaust valve) or air leaking into the oil crank case (rings broken) or if antifreeze overflows out of the radiator (bad head gasket).
Check for the clicking sound of the injector with a stethoscope (confirms no electrical problem but does not confirm a flow problem)
Good luck and let us know how you make out.

 

I was getting misfire codes for a long time, finally traced it to a bad cyl. Do a compression test before something fails and the cost goes up.

 

p0313 is a low fuel code. This will definitely cause a misfire! If the fuel is not low try disconnecting the vacuum hose from the fuel pump regulator on the fuel rail. Plug the open end of the host to get rid of the vacuum leak. this action Will raise the fuel pressure to the rail. If your misfire goes away....you are looking at a weak fuel pump. the pump must always produce enough pressure to overcome the restriction of the fuel regulator located on the rail. The restriction is highest at idle because that is when the vacuum is strongest and closes the regulator.

 

I have an early '02 Cooper and this afternoon received a 0301 diagnostic code. This code was accompanied with a 1627 diagnostic code. Looked in the Bentley service manual and that code is not listed. Reset the codes with a Peake R5/EMX tool, drove 100 miles or so and no error codes at present time. The 1627 error code is the one that has my at this point. Any one out there know what this error code means???

Additional info:
been autocrossing for past 4 years
spark plugs changed yearly
plug wires changed last year
165K miles on Mini

Any info on the 1627 diagnostic code would be appreciated.


tks

 

Found this for you. http://www.troublecodes.net/OBD2/Pcodes.shtml#1600
says that a p1627 is module supply voltage out of range

 

Thanks. Any thoughts on which power supply is at fault???

 

I would just be guessing,but since you have a misfire code it is possible there was a voltage problem to the fuel injector. If you look on page ELE-80 and 81 of the Bentley manual the injectors are wired to the DME. Most likely not a fuse problem, they either work or they don't. Since you cleared the code I'd just wait and see if it comes back.

 

Thanks. I will keep an eye on this problem and keep my fingers crossed that I don't get another one.


Thanks again.

pjo

 

1000's series codes, i.e. 1627, are manufacturer specific, and not read by standard OBDII code readers.

my330i.com lists it as a bmw code:

SAE Code P1627 DTC Code 18035 Description Data-Bus Powertrain missing message from fuel injection pump
don't know for sure if MINI shares all the same dtc codes with bmw.
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1627...Alternator load sensor diagnosis...short circuit to battery or open circuit....the 301 is a misfire code....the alternator detects the load and adjusts the output curent accordingly, the error is detected by the continous monitor..it will not turn the light on...the MIL is on for the p0301.
Hope this helps

 

1627...Alternator load sensor diagnosis...short circuit to battery or open circuit....the 301 is a misfire code....the alternator detects the load and adjusts the output curent accordingly, the error is detected by the continous monitor..it will not turn the light on...the MIL is on for the p0301.
Hope this helps

 

did a tranny rebuild, now the batt light is on... got a 1627, replaced alt.. still there...

anyone find a fix for this 1627 in this thread?
or ideas where to look? broken wire?

 

I have codes PO300,301,313,p1683 I looked up problems any ideas what to repair 1st

 

Please help I am able to do many repairs

 

My customer w/06 Mini Cooper has P0301 and P0303. The ngk spark plugs double platinum have a white plastic top that breaks easily, don't used them. Use the NGK iridiums instead.

 

Mine does the same exact thing fid u find out what was wrong with it