cant fix a flashing engine code
#1
cant fix a flashing engine code
hello I need some help I have a 2002 Disco II. I had my head gaskets changed recently now I have a flashing engine light that comes on and off at no set point. I have engine codes P1117, P1300, P0300, P0301, P0303, P0305, P0307.
so far i have changed the
*Plugs
*wires
*coil pack
*O2 sensor upflow and downflow on Bank 1
*MAF sensor
any help would be greatly appreciated
so far i have changed the
*Plugs
*wires
*coil pack
*O2 sensor upflow and downflow on Bank 1
*MAF sensor
any help would be greatly appreciated
#2
hello I need some help I have a 2002 Disco II. I had my head gaskets changed recently now I have a flashing engine light that comes on and off at no set point. I have engine codes P1117, P1300, P0300, P0301, P0303, P0305, P0307.
so far i have changed the
*Plugs
*wires
*coil pack
*O2 sensor upflow and downflow on Bank 1
*MAF sensor
any help would be greatly appreciated
so far i have changed the
*Plugs
*wires
*coil pack
*O2 sensor upflow and downflow on Bank 1
*MAF sensor
any help would be greatly appreciated
Now you say this condition comes and goes? That sounds like an intermittent bad connection of some sort at a control sensor. Good Luck and keep us posted on your progress.
#3
You know what, now that I think about it a little more, that P1117 code is an even better clue to this problem. That's a coolant temp. sensor code. You may want to start there. That sensor also works off of the 5v reference circuit along with the cam and crank sensors and could also be driving your mixture rich. That's the sensor the computer uses to control cold start. It may be thinking it's cold, if the voltage is dropping out on that sensor. Check that sensor and make sure it's plugged in good and tight and check the wiring really good on that too.
Last edited by disc oh no; 05-24-2015 at 07:39 AM.
#4
Every time I have seen misfires all on one bank it's been the O2 sensor. The only logic I can make of that is that with the O2 not functioning the computer either dumps too much fuel or not enough to those cylinders causing the misfires I know you installed new ones on Bank 1 but try swapping the upstream sensors side-to-side and see if the misfires move to Bank 2. I have had more than one O2 sensor be bad right out of the box.
#5
Every time I have seen misfires all on one bank it's been the O2 sensor. The only logic I can make of that is that with the O2 not functioning the computer either dumps too much fuel or not enough to those cylinders causing the misfires I know you installed new ones on Bank 1 but try swapping the upstream sensors side-to-side and see if the misfires move to Bank 2. I have had more than one O2 sensor be bad right out of the box.
I didn't realize these misfires were all on bank one. For some reason I thought I saw an eight in there? Maybe the 3+poor eyesight? That P1117 code may or may not be related, but this can cause a rich condition too (or lean for that matter). So you'll want to figure that one out too. The easiest test to do for that is to unplug the sensor and make sure you have 5 volts. Then you can plug it in and back probe the other wire and monitor the voltage to be sure it changes with engine temp. If it's stuck at one constant voltage, then you know the sensor is no good. If you don't have 5v there, then it will be in the wiring or engine computer.
Last edited by disc oh no; 05-24-2015 at 08:44 AM.
#7
hey i was just thinking my cousin did the head gaskets for me and when he did I had him change out the radiator. He said something to me about a sensor that he would have to fabricate a bracket because the radiator didn't have a place for it. does this sound like it could be the sensor you are talking about.
#8
hey i was just thinking my cousin did the head gaskets for me and when he did I had him change out the radiator. He said something to me about a sensor that he would have to fabricate a bracket because the radiator didn't have a place for it. does this sound like it could be the sensor you are talking about.
#10
I can't remember on the Disco. I haven't had trouble with mine in forever. A lot of cars have a few different ones. If your gauge is working correctly but you're getting a temp sensor code, it's probably got one for each function. There are also temp switches for the cooling fans on many vehicles.
I think mine was in the intake manifold, if I remember right. Anyway, mine was so bad that I had a wandering idle when it got hot because it was still trying to run cold start functions. I think the fuel system kept dropping in and out of open loop too. That sensor can cause all sorts of trouble!
Anyway, there's one (I think) in the radiator right near the top hose and one in the intake manifold. Don't quote me on that, I work on way too many different vehicles to remember everything and my truck is not here at my house right now.
Were you able to get any data on the O2 sensors and/or fuel trims?
I think mine was in the intake manifold, if I remember right. Anyway, mine was so bad that I had a wandering idle when it got hot because it was still trying to run cold start functions. I think the fuel system kept dropping in and out of open loop too. That sensor can cause all sorts of trouble!
Anyway, there's one (I think) in the radiator right near the top hose and one in the intake manifold. Don't quote me on that, I work on way too many different vehicles to remember everything and my truck is not here at my house right now.
Were you able to get any data on the O2 sensors and/or fuel trims?