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Old 25th February 2010, 04:50   #1
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Help! Engine failsafe program

Well i bought my m5 at 97k miles an right around 99k miles my SES light started coming on so i took it to advance auto an it said o2 sensor bank 1 sensor 2 or whatever but anyways i got the paper for it. So i cleared the light but didnt get o2 sensor because i was being kinda lazy an cheap. So i noticed the light coming on alot more now an the car would like "break up" when i would pull off at stop lights it would hesitate sometimes but once you got up to speed it drove fine. But there are time when im keeping a steady speed on highway doing like 65mph in 6 gear it would break up or hesitate. So one nite i was driving an my SES light comes on an engine fail safe program light. So im like what the hell is this so i go to advance an check what it says an it said TPS sensor an o2 sensor so i clear the light an start driving an the light wouldnt come on. But a few hundred miles later the light comes on like i can clear the SES light an it wouldnt come back on until the car either breaks up or hesitates an both SES an engine failsafe program light an they both come on at same time no more than maybe 5 minutes after clearing light. So my guess is, can the engine fail safe program light come on for these 2 sensors, but mainly just TPS? Im gonna get the o2 sensor an tps sensor an do the work myself, but im hopeing this fixes the problem. The car is now a bit over 100k miles..... From what i know Fail safe program puts our cars into limp mode an thats just what it does my car drives normal but as soon as u give it a bit of gas it feels like a turd an is dog slow. Hmmm one other thing when both lights come on, i can turn the car off an let it sit for 2 mins an start the car an SES light will be on but not the failsafe program but i drive for about 2-3mins an it comes right back on. Any suggestions? or advice?
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Old 25th February 2010, 05:31   #2
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Step 1: Buy a Peake, Going to a advanced auto is crazy, I would let those hacks ever touch my car, even if it was just reading codes.

Step 2: Stop being cheap and buy a OEM O2 sensor and OEM TPS and replace both, Dont drive the car until then. Engine fail safe mode is there so you can limp the car to a shop or home.

Step 3: Post back when step one and 2 are done.



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Old 25th February 2010, 05:38   #3
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Thanks for the advice why should i buy a peake? I used to work at the advance auto that i took my car by so i checked the code myself, is there a different between the code reader at advance an the peake? An yes im going to get the o2 sensor an tps sensor next week an replace them, an with those 2 sensor mainly the tps those will make the engine program come on, i figured it would only come on if there was a super major issue with my car. But yes i see what you mean i was being a cheap *** my uncle told me to take care of this car because if your not than dont buy it because stuff isnt cheap. He also drives an m3 an a z3 roadster..... myself ive came from 240sx's an swapped civics.....
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Old 25th February 2010, 05:39   #4
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You get recurring codes for the same issues so that confirms that the parts are bad. The problems won't go away on their own. You need to replace the parts. You either pay now or pay later and usually with interest.

The engine fail safe can come on for the failing TPS because the car doesn't have a throttle cable. Without a correct reading, the fail safe program is engaged to prevent unintended acceleration.

I'm not convinced the Peake is worth the money. I just got an Actron CP9180 and it can do more diagnostics than the Peake, which seems antiquated in comparison.

Even though the Bentley manual doesn't specifically cover the M5, it may not be a bad investment to at least use as a cross reference.
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Old 25th February 2010, 05:46   #5
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Yeah your right beleive me im on it right now ive found the oxgen sensor online, but i cant find the tps sensor worth **** just regular 5 series. An yeah the actron reader is good stuff thats the same one my old job uses an its great. Im just tired of the lights coming on an its kinda embarassing. As soon as its fixed im gonna invest in a afe intake system an shark injector chip.
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Old 25th February 2010, 10:16   #6
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Quote:
Originally Posted by s14 tunr View Post
Yeah your right beleive me im on it right now ive found the oxgen sensor online, but i cant find the tps sensor worth **** just regular 5 series. An yeah the actron reader is good stuff thats the same one my old job uses an its great. Im just tired of the lights coming on an its kinda embarassing. As soon as its fixed im gonna invest in a afe intake system an shark injector chip.

As you say you are "cheap and lazy". Lets hope this changes quickly

Get the TPS from people who sell BMW parts online, like Getbmwparts.com or something like that.

Get the 02 sensors from Amazon, believe it or not, they have some pretty cheap original Bosch ones on there sometimes.

Which 02 sensor are you going to change, pre cat or post cat ?

If you want a DEDICATED code reader, then it should be a Peake Coder Reader, there should be zero to very little debate about this. Anyone who tells you anyother, doesn't know the E39 M5 very well I am afraid. Ideally you want the full dealership GT1 or INPA/DIS setup...

Good Luck mate and keep us posted.
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Old 25th February 2010, 11:00   #7
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Old 25th February 2010, 11:22   #8
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Quote:
Originally Posted by M5 London View Post
If you want a DEDICATED code reader, then it should be a Peake Coder Reader, there should be zero to very little debate about this. Anyone who tells you anyother, doesn't know the E39 M5 very well I am afraid. Ideally you want the full dealership GT1 or INPA/DIS setup...
I haven't used any particular code reader long, but as a serious question, what are the benefits of the Peake? It's supposed to read manufacturer specific codes, but the generic code reader I used pulled the manufacturer specific error code and gave me the error description, same as the Peake (throttle control, return spring in my case). There was a small benefit not having to flip through the Peake booklet though you may at some point need to search for the error code pulled by a generic reader (I bought a higher model generic, perhaps it varies). I also don't like that the Peake doesn't spit out the actual OBD II code. It spits out a code for a code, which I must always look up. If I then try to ask a mechanic or forum members, I have no actual OBD code to give him or her. I just have a problem description. The Peake can't run O2 sensor tests and other live data tests from what I can tell. You can reset service lights and oil change lights with the Peake, but you can do that via the dash on later cars anyways. I bought a Peake and read the manual, but I'm more impressed with the abilities of the generic scanner and I haven't even read the more substantial manual. I only saw a glimpse of the functions from the menu screens. My Actron was less costly than the Peake and I can use it on other cars. Are there hidden features that I overlooked on the Peake?
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Old 25th February 2010, 11:40   #9
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Quote:
Originally Posted by ND4SPDLSC View Post
I haven't used any particular code reader long, but as a serious question, what are the benefits of the Peake? It's supposed to read manufacturer specific codes, but the generic code reader I used pulled the manufacturer specific error code and gave me the error description, same as the Peake (throttle control, return spring in my case). There was a small benefit not having to flip through the Peake booklet though you may at some point need to search for the error code pulled by a generic reader (I bought a higher model generic, perhaps it varies). I also don't like that the Peake doesn't spit out the actual OBD II code. It spits out a code for a code, which I must always look up. If I then try to ask a mechanic or forum members, I have no actual OBD code to give him or her. I just have a problem description. The Peake can't run O2 sensor tests and other live data tests from what I can tell. You can reset service lights and oil change lights with the Peake, but you can do that via the dash on later cars anyways. I bought a Peake and read the manual, but I'm more impressed with the abilities of the generic scanner and I haven't even read the more substantial manual. I only saw a glimpse of the functions from the menu screens. My Actron was less costly than the Peake and I can use it on other cars. Are there hidden features that I overlooked on the Peake?
The generic code reader will give you a generic code and by definition this is a compromise, if not please explain.

There will be many instances, all documented excessively on this board, where the peake code reader will determine a problem with zero or little doubt. When your generic code reader will say things like Bank 1 Exhaust CPS instead of CPS for example I will change my view on generic code readers.

DO NOT GET ME WRONG, as I said earlier, the PEAKE CODE READER is the best DEDICATED code reader for our cars....

If you want to start talking about live data streaming etc then the best there is the GT1 or INPA or similar.....If you are serious about your car you need, the Peake Code Reader to keep in your glove box with the table of codes (or if you are like me, I know most of them off by heart ) and you need a GT1 / INPA setup to keep in reserve for when you want to do some more heavy inquisitions of your DME.

Also please note that we members who recommend the Peake are not tied in on any commission structure for their product, we are simply telling you and anyone else who asks about codes about their cars, after lots of reading of other members experiences and our own, that you cant get better than a Peake Code Reader as your initial diagnostic tool. It will save you time and money in the medium to long term, hell even in the short term.

You have less than 31 posts, I wish I was there again, because I would be on the very steep but fun part of the learning curve of our cars. I can guarantee that if you become more involved with these cars and as your post count approaches 500 you will fully agree with me and others about the necessity of a Peake Code Reader.

Good Luck

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Old 25th February 2010, 14:08   #10
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Here is what triggers the failsafe program:

If it did not limit to 70mph,one of the two potis of the throttle pedal sensors is toast.
If it limited to 70mph,one MAF is gone...

If limited to 35mph,either jammed throttle or internal module fault...
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