P02E8 Diesel intake air flow “a” position sensor circuit low

[vijith555]

Have done about 6-8 ignition cycles in the past two days both short and long drives and the CEL hasn’t come back so far. Everything seems to be smooth from feel.

Let’s see maybe like Drover mentioned it could have been in the middle of a burn or needed some extended driving to clear the sensor a bit from a build up. Plus the ECU needs few drives to reset too.

Fingers crossed so far

[vijith555]

Just bringing back the discussion to the correct thread again instead of discussing in a wrong thread.

So I spoke to a couple of garages and told them the problem and most of them were like not friendly and straight away went to I will ring you back and give you a price to change your whole throttle body. I was like what?!

Then I just rang another Jeep specialist garage (not the Jeep dealership) and the guy was quite friendly over the phone. Listened to the issue over the phone and straight away said if I am happy for them to take the hose off and do a clean/inspection they are happy to do it for me. You guys have given me all the instructions to do it but I am just worried I might break something putting it all back and I know once I watch someone do it, it will be a piece of cake. Plus this is my daily and just don't want to make a mistake and make is not drivable. But I am definitely going to buy CRC sensor cleaner and first try to clean the temp sensor connecting to the throttle body and see if that helps. If not step 2 with these guys.

Since I am going away for a couple of weeks I will let the Jeep take a rest and when I am back, will schedule a time with this guy and see if he can attempt the inspection and clean methods. Atleast then we know if it is physically shot or just electrical glitch somewhere.

Will update you guys on how I go hopefully soon and thanks for the great advise that gave me more confidence speaking to mechanics and sound like I know what I am talking about so they cannot push me around

[vijith555]

So I am back from my break and had a few days of no CEL driving (happy days) but it did come back ofcourse.

I have decided instead of taking the car on a separate day to the mechanic to get it looked at just get them to have it checked on my next service which is due soon. Don't have enough time with work to have the car taken twice at this stage plus its running fine despite the warning.

I thought I would just take the hose off to check last night after a wash but just couldn't figure out how to take off the black clip which seems to have two tabs on its sides but it just does not seem to be like tabs. Seen many videos where people don't have this black plastic brace on top of the steel ring like clip that could just be lifted with a flat head. Why this extra clip not sure. Also, I seem to have that heat sink like thing on top but seen a few RAM videos having a set of hoses that sit on top of it hence the reason of its existence. Cannot find one video with this black clip on to see how they do it. Just don't want to break it that is why I am being extra careful with this.

[drover]

You just have to move the wire the 2 ends of the wire lock in place and the centre part , once thats moved out of the way the hose should just wriggle off, the black plastic fitting is all part of the thing, if that gets pulled off its broken.
Its a prick of a job to get the wire to lock into the holders, at least I think so, I use very small bladed screwdrivers to flip them.

[Treebreakerbob]

JUst had a read of this thread and thoughts are, can your scanner do a freeze frame, which is a reading of all available sensors when the check light came on. An example is my P0192 which is fuel rail pressure circuit low but the freeze frame shows what the pressure is, usually in my case, zero. You can only do this freeze frame when the light comes on as it is saved in the ecu but isn’t necessarily stored permanently
If not then find the actual position of whatever it is when the circuit is low, which should be the opposite to when the sensor circuit is reading high

Hopefully in drovers wm there will be a breakdown or maybe google

One thing the dealers have if they have spent the money on jeep’s Software is they can read all the sensors and extensions of codes that generic obd2 scanners cannot get to. Not many dealers have the full package as it is very expensive so most of them just fly blind like we do

Hope this helps

[vijith555]

Originally Posted by Treebreakerbob

JUst had a read of this thread and thoughts are, can your scanner do a freeze frame, which is a reading of all available sensors when the check light came on. An example is my P0192 which is fuel rail pressure circuit low but the freeze frame shows what the pressure is, usually in my case, zero. You can only do this freeze frame when the light comes on as it is saved in the ecu but isn’t necessarily stored permanently
If not then find the actual position of whatever it is when the circuit is low, which should be the opposite to when the sensor circuit is reading high

Hopefully in drovers wm there will be a breakdown or maybe google

One thing the dealers have if they have spent the money on jeep’s Software is they can read all the sensors and extensions of codes that generic obd2 scanners cannot get to. Not many dealers have the full package as it is very expensive so most of them just fly blind like we do

Hope this helps

Hi mate that sounds like a good idea and no I have not attempted to do this before. I am using JScan which I believe might be little less capable than AlphaOBD. I have seen an area where you can record all available sensors but not sure about freezing frame. Will definitely give this a look.

I am going to take the car tomorrow to a Jeep specialising garage here in Perth where they have agreed to take out the hose and give it a good inspection (something I am not confident to do myself) and possibly maybe a clean. The only garage who was friendly enough to say 'bring your Jeep in I will have a look at it on the spot' whereas other garages and dealerships were quite dry with their responses over the phone and in person.

I am hoping by tomorrow if they get a chance to look at it, they might be able to tell me how bad it is. I am currently driving with no CEL so hoping it comes back tomorrow when I take it there. Somehow even though the PO2E8 is stored permanently it does another check and sometimes able to clear itself provided I had few good ignitions.

One clue I can give not sure if this helps in narrowing it down is that on a cold morning if I start the car and then cut the engine off in about 2-5 minutes and try to start again straight away, the starter takes few more seconds to start just like its struggling with no fuel, followed by the CEL immediately coming up again. Happened to me few days back when I went to get fuel in the morning and the station is only like 2-3 minutes from home. When the car is warm, you can stop engine and start as many times and all goes smooth.

[drover]

Does sort of sound like the flap is sticking, interesting to see if my thoughts on gummed up gears was on the money or not... Hope its nothing too serious... If it is the flap gearing then that Italian mob is the less expensive way to go otherwise its the whole housing I believe.