Hi all,

Newbie here. I have a 2013 116d with 78k on the clock.

Randomly the other day the RPM just started hanging / coming back down very slowly, and when stationary, idle creeps from circa 900rpm up to around 1200/1300 and stays there.

It's had a scan and the only fault code coming up is for 'Fuel Filter Heater Open Circuit'.

It's booked in next week for a full service including new filter with heater (£££ 😂) but just wondering if anyone has encountered this before and whether I'm being optimistic thinking this might sort the issue, or whether I need to be prepared to look elsewhere for a cause?

Thanks guys.

Sam.

Ok, quick update. If I gently pull the accelerator pedal back when idling or if I rev it up and gently pull it back, revs behave normal and idle is correct. Am I right in thinking this actually points to an issue with the accelerator pedal sensor? If so, is there a method to clean it up in the short term, or is it a straight replacement kind of job. Thanks again.

Morning Sam

Welcome to the Forum

I would say you have diagnosed your issue it just needs confirming

I would start by checking www.realoem.com the small exploded drawings will help with seeing how the pedal is mounted. A really good clean and some lubrication may be all that's needed

Good Luck

Dave

6 minutes ago, Greydog said:

Morning Sam

Welcome to the Forum

I would say you have diagnosed your issue it just needs confirming

I would start by checking www.realoem.com the small exploded drawings will help with seeing how the pedal is mounted. A really good clean and some lubrication may be all that's needed

Good Luck

Dave

Thanks Dave 👍🏼

35 minutes ago, Greydog said:

Morning Sam

Welcome to the Forum

I would say you have diagnosed your issue it just needs confirming

I would start by checking www.realoem.com the small exploded drawings will help with seeing how the pedal is mounted. A really good clean and some lubrication may be all that's needed

Good Luck

Dave

Thanks, Dave. Forgive my ignorance, but what sort of lube can you use on something like this, being that's got electrical elements? Would a smear of something like Vaseline be ok on the sliding arm part?

38 minutes ago, Greydog said:

Morning Sam

Welcome to the Forum

I would say you have diagnosed your issue it just needs confirming

I would start by checking www.realoem.com the small exploded drawings will help with seeing how the pedal is mounted. A really good clean and some lubrication may be all that's needed

Good Luck

Dave

Thanks Dave! Forgive my ignorance but what sort of lube can you use on something like this given that it has electrical elements. Would a smear of something like Vaseline on the bar be ok?

Hi Sam

A Silicone spray or a little Vaseline, remember the footwell is a mucky place all sorts of mud grit and god knows what brought in on our boots 😆

So make sure everything is clean, really clean all dirt and grit hoovered out the electrical components are sealed to protect them so your target is allowing free running sliding action of the pedal.

Dave