Throttle position sensor

Araitim · Sep 10, 2018

I'm having a hard time finding a source for throttle position sensors. I have looked at Ebay and through the Ducati Micro diagrams and found nothing. Can you point me to a source on where to get them please?

monocog007 · Sep 10, 2018

The TPS is part of the throttle assembly, why would you need to replace it?

Araitim · Sep 10, 2018

monocog007 said:
The TPS is part of the throttle assembly, why would you need to replace it?

Inconsistent voltage coming from the sensors. Apparently it's a common issue with all Ducati 's. This is said to be what is causing my sputtering and surging while maintaining a steady throttle. I have gone through so much with this bike and this is just about the only thing left. I have read numerous links and posts that point to the TPS, only a few were for the hyper though. New plugs, new eldor coils, new lithium battery, rewire the wiring harness, clean all contact points to every connector, clean O2 sensors(thought #2 was bad but switched it with #1 and the #2 still says it's too rich), verified that the drive by wire throttle tube is operating properly, plus a few other things. Many of the posts I have read, the TPS is something that has a tenancy to wear out and cause my exact issue. Some of the posts said that it happens after having the dealer sync/reset the TPS. I recently had that done and have been having issues ever since.

gatdammit · Sep 10, 2018

Damn, those don't sound cheap. Think cleaning the contacts would help. We are having the exact same issue so I'm following your lead.

Bones302 · Sep 10, 2018

i thought that was covered by a Ducati service bulletin?

ferdi · Sep 10, 2018

gatdammit said:
Damn, those don't sound cheap. Think cleaning the contacts would help. We are having the exact same issue so I'm following your lead.

there are no contacts inside the throttle

i would change the hole throttle grip, which includes everything involved

Araitim · Sep 10, 2018

Bones302 said:
i thought that was covered by a Ducati service bulletin?

The service bulletin was supposedly covered back in 2016 according to the 2 dealers in Michigan(I called them both because I didnt believe them). They replaced the throttle for that bulletin.

mentalist · Sep 11, 2018

I think you'll find euro 4 emissions is to blame for the spluttering during steady throttle.
Fit a rapid bike evo module and you'll find its so much better.

Araitim · Sep 11, 2018

mentalist said:
I think you'll find euro 4 emissions is to blame for the spluttering during steady throttle.
Fit a rapid bike evo module and you'll find its so much better.

I have a rapidbike module and the rapidbike technicians went in 2 times remotely to try and resolve my issue and it did not fix the problem which is why I have been digging into it deeper.

mentalist · Sep 11, 2018

Ok, I have the rapid bike and had a similar problem with a steady throttle. Turned out to be a bad connection on the lambda sensor which later failed.
I replaced the lambda sensor and bike has been fine since.

gatdammit · Sep 12, 2018

mentalist said:
Ok, I have the rapid bike and had a similar problem with a steady throttle. Turned out to be a bad connection on the lambda sensor which later failed.
I replaced the lambda sensor and bike has been fine since.

Mentalist,
By lambda sensor, do you mean the entire 02 sensor unit? If so, which one? I have the exact same issue as OP. Also have RB Evo. I think he isolated his 02's during one test and no change.

mentalist · Sep 12, 2018

Hi, my front O2 sensor failed and had to be replaced, prior to that when the throttle was playing up I found that the block connector and terminals for the front sensor where water contaminated and corroded. Note that the rapid bike loom plugs into these sensors. There are resistance checks you can carry out from the connector to see if the sensor has failed.

gatdammit · Sep 12, 2018

I'm thinking this is a better lead. I've found lots of corroded terminals upon dismantling.

mentalist · Sep 12, 2018

gatdammit said:
I'm thinking this is a better lead. I've found lots of corroded terminals upon dismantling.

let me know how you get on, hope you get it sorted.

Araitim · Sep 12, 2018

I disconnected both lambda sensors and turned autotune off and the bike has been running great the past 2 days. The connectors are clean. I think its the sensors themselves. I do have a service light on the dash but I can live with that till I get around to replacing the sensors.

appliance821 · Sep 12, 2018

mentalist said:
Ok, I have the rapid bike and had a similar problem with a steady throttle. Turned out to be a bad connection on the lambda sensor which later failed.
I replaced the lambda sensor and bike has been fine since.

This makes sense. Idle and just off idle FI is closed loop and at that point the system is looking to the sensor for info and not getting it. So the TCU is functioning, bt the cpu isn't getting the info it's looking for based on the TCU position, so it's probably programmed to "guess' which leads to excessive surging.

krolinked · Sep 12, 2018

What's needed to remove the sensor leads? I have rapidbike Evo. Would like to disconnect the sensors but what else do I need to do?

mentalist · Sep 12, 2018

krolinked said:
What's needed to remove the sensor leads? I have rapidbike Evo. Would like to disconnect the sensors but what else do I need to do?

Why do you want to disconnect your leads?? do you have a running issue too?
Your rapid bike evo needs the info from these sensors to adapt.

If they are faulty you need to replace the sensors not just remove them.

mentalist · Sep 12, 2018

Araitim said:
I disconnected both lambda sensors and turned autotune off and the bike has been running great the past 2 days. The connectors are clean. I think its the sensors themselves. I do have a service light on the dash but I can live with that till I get around to replacing the sensors.

Carry out a resistance test on both sensors, only one might need replacing.
They aren't cheap unless you find a good second hand one, like I did.

mentalist · Sep 12, 2018

Araitim said:
I disconnected both lambda sensors and turned autotune off and the bike has been running great the past 2 days. The connectors are clean. I think its the sensors themselves. I do have a service light on the dash but I can live with that till I get around to replacing the sensors.

Carry out a resistance test on both sensors, only one might need replacing.
They aren't cheap unless you find a good second hand one, like I did.

Throttle position sensor

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