E39 M5 Throttle problem...
Discussion
Hi,
As per title, recently the car has developed a slight hesitation on light throttle and has been going into ENGINE FAILSAFE PROGRAMME mode. It's an intermitten problem and somes day the car seems to lack power then on others its completly different and feels fine. Had the codes read and it's come back as throttle potentiometer problem. The throttle readings were out of sync with each other on the two banks. So had the throttles reset electronically and all was well for a few weeks and the car felt very rapid indeed compared with before. Now however, the problem has returned! It has had this fault in the past but has usually disappeared of its own accord and never threw up any codes in relation to the throttle. The MAF's have been changed not that long ago so ruled them out at the time. I know there are two Throttle Position Sensor's, is that what the codes referring to? Has anyone done this as a DIY and how much of a pain in the rear is it to do? Also how much are the sensors and where is best to get them from that's not going to cripple my piggy bank? Worth replacing both if not too ££££ heavy?
Any help is much appreciated as the car is now on 194k miles, so i'm going to expect problems like this really but i'm just getting ready to sell the car so need it in good working order for the next owner. But, with this don't want to go and spend X amount on hefty labour rates if its something I could do myself.
Many Thanks
Andy
As per title, recently the car has developed a slight hesitation on light throttle and has been going into ENGINE FAILSAFE PROGRAMME mode. It's an intermitten problem and somes day the car seems to lack power then on others its completly different and feels fine. Had the codes read and it's come back as throttle potentiometer problem. The throttle readings were out of sync with each other on the two banks. So had the throttles reset electronically and all was well for a few weeks and the car felt very rapid indeed compared with before. Now however, the problem has returned! It has had this fault in the past but has usually disappeared of its own accord and never threw up any codes in relation to the throttle. The MAF's have been changed not that long ago so ruled them out at the time. I know there are two Throttle Position Sensor's, is that what the codes referring to? Has anyone done this as a DIY and how much of a pain in the rear is it to do? Also how much are the sensors and where is best to get them from that's not going to cripple my piggy bank? Worth replacing both if not too ££££ heavy?
Any help is much appreciated as the car is now on 194k miles, so i'm going to expect problems like this really but i'm just getting ready to sell the car so need it in good working order for the next owner. But, with this don't want to go and spend X amount on hefty labour rates if its something I could do myself.
Many Thanks
Andy
If the codes were for the potentiometer then almost certainly that the problem. My old one had an issue with one of those around 135k so I can believe it will become an issue for high milers.
I think its located at the top of the engine and if you spend a couple of hours taking the plenium off you should be able to find them.
I think its located at the top of the engine and if you spend a couple of hours taking the plenium off you should be able to find them.
Found a "semi DIY" on m5 board.com which is basically the start and finish of the job so missing the bits that need to come off in between... Can you remember how much the part was and whether you needed an adaptor lead to fit to the new sensor? Apparently the design of the part has changed and needs a new cable, but then BMW have discontinued the lead so I don't understand how I can get this new part to work.
Thanks in advance.
Thanks in advance.
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