ok my car is throwing P0212 Injector Circuit Malfunction - Cylinder 12. now i have gone back to the stock injectors and removed my afc but the problem is still there. i dont know what else to check and i have never herd of any one else having this problem. also the car is missing badly under half - full throtle but drives normal under light load. any thoughts?

 

Where is cylinder 12? in the trunk? I never heard of this either, I will think, and get back to you. Someone has the answer. did an injector come loose?

 

turn on your engine and take a look at all your injectors with a flashlight, makesure there's no leakage or broken o rings. this happend when you were at WOT right ?? anyway disconect your battery for about 1-2 minutes and plug it back in. Is your car Dynolfash or some source of Engine Manage system?

 

to check for leaking injectors, run the car and spray brake cleaner on the injectors, one at a time, and listen for the engine to "bog". dont do this with a HOT engine though, or you might end up needing an eyebrow pencil.

 

no it is a stock ecu. i have allready reset the ecu and the problem is still there. the problem started with the 780cc injectors and i have gone back to the 550's, the problem is still there. also the car used to have an afc that i took out tonight.

 

roflmao

 

Hello o4whtevors

P0212 is what is called a generic OBDII code it does not matter if you have a Chevy, Ford or a Mitsu the code is the same.

So we know we do not have a 12 cylinder motor so my first question is what kind of code scanner are you using to retrieve the code?

It is in my experience that some scanners are not as effective at interpreting data on certain cars as they are others. In other words your scanner may not be the best suited for a Mitsubishi car data stream (but it may read a Chevy Pickup just fine).

I would guess that its identification of an Injector Circuit problem is probably accurate but just not the cylinder identification number. It may be the wiring or it could be an injector driver itself.

The first thing that I would do is attain a noid light or an oscilloscope or take the car to some one that has this equipment and see what injector(s) are at fault then you could see the problem in closer detail.

If you have any more questions please post up and keep everyone informed as to what the outcome is.



Chris Macellaro

 

i am using a palm m505 with the pocket logging software.as far as the p0212 it did not list a discription for the code i just looked it up. i also went to the dealer today and they told me that p0212 means electrical short. now i have modified my car but i can put it all back to stock, the only hard part will be the cams. what do you think? try to trouble shoot it myself? or go through the trouble of going back to stock and just drive it into a dealer and say fix it.

 

Hello

Again it would be useful to have a noid light or an oscilloscope, but if this is not available get a volt/ohm meter.

Here is what you can do get a factory wiring schematic including a pin out of the ecu. Set your meter on the ohms scale. Unplug the ECU located under the glove box and unplug each injector connector now probe the end of each individual pin that sends the ground signal to each injector. With the other probe connect it to each injector connector on the appropriate wire and measure the resistance across the length of each injector wire. An indicated high or infinite resistance would indicate a break or a short in that particular wire. A reading of low or no resistance will indicate the wire is fine.

This will tell you if you have bad wiring and if all the wires check out then you need to get a noid light or have some other way of verifying that the injector is getting the proper ground signal. If you are not getting a signal to each injector and you know the wiring is good then the connections are not good enough or you have an injector driver issue in the ECU.


Let me know
Chris Macellaro

 

i would need some really long leads to do this. how would you test with a noid light ?

 

I usually use a helper to hold the probe at the other end. Place the meter on the windshield and you should have enough length to reach both ends you are trying to test.

A noid light is a little device that you insert into the injector connection (plug). If the injector is getting the proper signal the light will flash when you turn the engine over.



Chris Macellaro

 

well the car is fixed. its a crazy, long, and amazing story but it turned out to be a plug wire. i found this out due to pure frustration, basicly i could tell the car was missing on only one cylinder and decided to pull the plugs in hopes of finding out witch one. in doing so i noticed one of my spark plugs looked like it had been arc welded with (top of plug only, the bottom looked normal). so i tested the wire and it came back at 75.5 KHoms (factory limit is 19 KHoms). i replaced the wires and plugs and to my amazment the afc and ecu acted normal, no more afc face glitch. then i relized i had read an artical about the resistors in sparkplugs years ago in a motorcross action magazine and how they keep the emp from the high voltage of the coil and spark down. in that artical they claimed that due to the brain of the motorcycle being close to the head you needed a spark plug with a resistor to keep it from causing interferance with the brain. now with my plug wire replaced i noticed all of my electrical components work much better. i have no more what i thought was a bad afc, i have no more wierd codes being pulled, and my stereo does not have any back ground noise. it also seems to get better reception. could the wire arcing do this? possibly.

now in closing i am not totaly sure if this was the culprit but it seems to fit the bill. any how the car runs great now and it only ended up being a $80 fix for everything. macsperformance thanks for taking the time out to help me trouble shoot, i do aprecaite it. aslo i am sorry the discription is so short, i have to get something to eat forgive me.

 

Your welcome and I am glad you found the problem. Being that it was so cheap to fix turned out to be another plus. Good Job




Chris Macellaro