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-   -   CHECK ENGINE LIGHT IS ON (https://xoutpost.com/bmw-sav-forums/x5-e53-forum/102742-check-engine-light.html)

Helihover 01-12-2016 07:54 AM
Quote:
Originally Posted by jfoj (Post 1065359)
If the SES/CEL/MIL is lit you really do not need a BMW specialized tool or software to read the codes.

OP did not mention what tool was used to read the codes and did not provide Freeze Frame date or Fuel Trim info.

Yes, in theory P0172/P0175 tend to be Rich codes, HOWEVER, there may be some typos and even if you study the Bentley manual closely there are some BWM codes that at least Bentley show pr translaste as BOTH Lean and Rich codes.

So I would guess the tool originally used likely output the codes in BMW 3 digit format and were incorrectly translated. Most modern vehicles do not run Rich as the vehicles ages and sensors and components age, usually the opposite.

I would be more than comfortable using a decent generic OBDII tool to gather the codes from this vehicle along with Freeze Frame and Fuel Trim data. Even a smart phone App like OBDFusion would be more than adequate to start with and it will give correct info because there is no translation from a BMW specialized code, the tool reads the OBDII PID's directly.
That's all good and I'm sure your way works. How ever plugging in some BMW software would most likely take you right to the root cause instead of logging data and freezing this and that. Seems that's all I read about lately. When my cam sensor went out I used an Obd reader and it didn't tell me I needed a cam sensor. I googled and started a thread and someone said it might be a cam sensor. I plug in INPA and it flat out told me I need a new cam sensor.

If the op would have had the code read via some sort of BMW software, this thread would have never been started, and he would have more money in his pocket!

jfoj 01-12-2016 08:31 AM
Quote:
Originally Posted by Helihover (Post 1065360)
That's all good and I'm sure your way works. How ever plugging in some BMW software would most likely take you right to the root cause instead of logging data and freezing this and that. Seems that's all I read about lately. When my cam sensor went out I used an Obd reader and it didn't tell me I needed a cam sensor. I googled and started a thread and someone said it might be a cam sensor. I plug in INPA and it flat out told me I need a new cam sensor.

If the op would have had the code read via some sort of BMW software, this thread would have never been started, and he would have more money in his pocket!
It does not quite work the way you think it does. OBDII supports cam sensor error codes as well as many other. Regardless of what tool/software is used, there is rarely any clear cut thing that says "replace this part and your problem will be solved". All any code is a "clue", there was some logic statement that something was outside of a parameter threshold to allow the code/error to trigger. The is no specific magic about any tool whether a generic OBDII App or a $50k dealer tool. At the end of the day, ALL information needs to considered and it will be an educated guess/decision as to what the next step may be.

The M54 is a vacuum leak waiting to happen and if I had to guess the OP has one or more vacuum leaks on his 13-14 year old vehicle.

As I mentioned it will be highly unlikely that the OP actually has a Rich condition, most Rich conditions, if they exist are false positives.

-skidmarks- 01-14-2016 06:58 PM
For future reference an easy way to test a MAF is to unplug it. If it runs worse and stalls the MAF is fine

caposto 09-28-2016 04:02 PM
I'm getting the same 2 rich error codes using a standard OBDII on my '02 3.0. Yes, taking it to the dealer or indie shop is one solution but I'm trying to figure it out and fix it myself so that's not really helpful advise, more of a Captain Obvious response and not what a forum is about IMHO.

Doubtful its a vacuum leak as that is a lean situation not rich. If anyone is getting these error codes with a standard reader and have found a cause, please share!

jfoj 09-28-2016 06:03 PM
Quote:
Originally Posted by caposto (Post 1089095)
I'm getting the same 2 rich error codes using a standard OBDII on my '02 3.0. Yes, taking it to the dealer or indie shop is one solution but I'm trying to figure it out and fix it myself so that's not really helpful advise, more of a Captain Obvious response and not what a forum is about IMHO.

Doubtful its a vacuum leak as that is a lean situation not rich. If anyone is getting these error codes with a standard reader and have found a cause, please share!
What OBDII tool are you using??

Suggest you post Freeze Frame and warm idle Fuel Trim info before you do anything else.

The engine may be running Rich but I doubt it, most "Rich" conditions are false positives. Also the code(s) may have been translated incorrectly.

Post exact codes and the OBDII tool you are using.

caposto 09-28-2016 06:16 PM
AutoXray CodeScout AX2500

Exact codes are P0172 and P0175

I found a thread here: http://www.xoutpost.com/bmw-sav-foru...0175-dtcs.html that looks promising so following that guidance to check for leaks in the intake bellows next.

jfoj 09-28-2016 07:04 PM
You are a new member here, you have 2 threads you are working for the same problem.

You need to determine what thread you want to proceed in with this problem.

Also I hate to tell you, the current scan tool you have is not likely going to be a lot of help. Unclear if it supports Live/Realtime data and you have to buy software to transfer info to a PC.

Spend less than $30 for the OBDFusion App and interface. This will run on your phone/tablet and will allow you to gather a great deal of data and post it for review and comment. There is not way you will be able to easily transfer the large amount of data from your current tool, much less Log OBDII PID data. Trust me, this is not my first rodeo and OBDFusion is worth every penny of $10 or less for the App. Yes you have to figure it out, but most people can get the hang of the tool within the first 10-20 minutes playing around with it.

You can chase some of the ideas you have based on this forum, but here is most of what you really need to know:

Cold weather misfires and CEL, common issues $50 fix! - E46Fanatics

OBD Fusion, How to Log Data, courtesy of jfoj - E46Fanatics

Idle sputtering, intake popping, CEL, and exhaust smells like gas - E46Fanatics

caposto 09-29-2016 06:09 PM
Yes, I am a new member here. ?? No, I am not new to forums but this is my 1st X5. You can check the E28 forum, E10 forum on Roadfly, Volvo forums, and Jeep Wrangler forums if you'd like to continue your investigation.

Yes, I have a thread going to try and solve my issue but did a search on the topic again and came across this thread that I posted to - That's how forums work. I will 'proceed' with my other thread but will read through the links below you have provided so thanks for that.



Quote:
Originally Posted by jfoj (Post 1089119)
You are a new member here, you have 2 threads you are working for the same problem.

You need to determine what thread you want to proceed in with this problem.

Also I hate to tell you, the current scan tool you have is not likely going to be a lot of help. Unclear if it supports Live/Realtime data and you have to buy software to transfer info to a PC.

Spend less than $30 for the OBDFusion App and interface. This will run on your phone/tablet and will allow you to gather a great deal of data and post it for review and comment. There is not way you will be able to easily transfer the large amount of data from your current tool, much less Log OBDII PID data. Trust me, this is not my first rodeo and OBDFusion is worth every penny of $10 or less for the App. Yes you have to figure it out, but most people can get the hang of the tool within the first 10-20 minutes playing around with it.

You can chase some of the ideas you have based on this forum, but here is most of what you really need to know:

Cold weather misfires and CEL, common issues $50 fix! - E46Fanatics

OBD Fusion, How to Log Data, courtesy of jfoj - E46Fanatics

Idle sputtering, intake popping, CEL, and exhaust smells like gas - E46Fanatics

mig25 03-06-2017 11:13 AM
Solution for this issue found
 
After driving with a check engine light on for one year, I finally fixed it.
It turned out back in 2015 I changed the fuel filter and used a Mahle filter I bought on Amazon for around $50 or so.
Last Saturday I replaced the fuel filter once again, now I used an OEM BMW filter I bought at Pelican parts for $107.
I reset my check engine light , it is now gone.
I think the problem was the in filter pressure regulator for non OEM does not have the correct fuel pressure, hence check engine light was on showing codes P0172 and P0175.
P.S
The OEM BMW fuel filter also says Mahle on it , but also has a BMW Logo on it.

X53Jay4.8is 03-06-2017 12:34 PM
Quote:
Originally Posted by mig25 (Post 1104072)
After driving with a check engine light on for one year, I finally fixed it.
It turned out back in 2015 I changed the fuel filter and used a Mahle filter I bought on Amazon for around $50 or so.
Last Saturday I replaced the fuel filter once again, now I used an OEM BMW filter I bought at Pelican parts for $107.
I reset my check engine light , it is now gone.
I think the problem was the in filter pressure regulator for non OEM does not have the correct fuel pressure, hence check engine light was on showing codes P0172 and P0175.
P.S
The OEM BMW fuel filter also says Mahle on it , but also has a BMW Logo on it.
Perhaps you just had a defective Mahle fuel filter from amazon.


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