And so, it begins... Streetfighter V4S at 9500 miles...

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on/off

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Just crossed the 1 year mark with my Streetfighter V4S. I'm at 9500 miles. The bike has not had a single issue until the 1 year mark. I started her up and as I'm riding, the bike will not rev past 4k rpms, cuts power, and the red immobilizer light flashes. The yellow engine light and yellow triangle light are on. A DQS error is showing as well.

My bike has been tuned with UpMap for 7 months and just 2 weeks ago I had the 15/43 sprocket combo installed. I can use the quickshifter up, (1-6)without issues, but cannot downshift(6-3). Even with the sprockets installed and issues using the quickshifter, there wasn't any light or error message on the dash for the past two weeks since installation. I also have a anti gravity battery installed.

I've plugged my UpMap dongle into the bike and the error code is P0222 - throttle/pedal position sensor/ switch 'B' circuit low. When searching the forums, I see many TPS issues with various codes listed, but no one on this forum(according to the search function) has written about the P0222 code.

I've cycled the ignition x3, disconnected the battery, cleared the code to no avail. Should I remove the cover where the battery is located and check the throttle wire connection? I'm not sure if that's where the throttle plug sensor is located. I see it just behind the right fork tube.

Help please.
 
You might consider testing the bike with a different battery to ensure the one you have isn't causing issues.
 
Just adding another bit of info. I turned off the quick shifter via the menu screen and the issue persists. I also disconnected the quickshifter physically and did not fix the issue. ugh.
 
The problem isn’t with the quick shifter. The bike is detecting a fault and is in limp mode.

It’s going to need a trip to the dealer if you don’t have the ability to see sensor values. Even then, it’s under warranty…
 
Last edited:
bp_SFV4 said:
The problem isn’t with the quick shifter. The bike is detecting a fault and is in limp mode.

It’s going to need a trip to the dealer if you don’t have the ability to see sensor values. Even then, it’s under warranty…
Click to expand...

I'm trying to do my best to fix it without taking it to the dealer. You sound so sure that it doesnt involve the quickshifter, but after the gear change all of these issues popped up. It's not the definitive reason, but it does raise suspicions does it not?
 
The problem with downshifting with your gearing change isn't related to the DQS error message on the dash. The DQS error message is related to the limp mode/throttle position/error code problem.

Throttle position in Ducati OBD parlance isn't the twist grip, but the throttle bodies inside of the airbox under the tank. I think the twist grip is called the accelerator or APS

I suppose you could read the voltages the TPS is sending out manually, but that's a lot of disassembly to get there, and again, its under warranty. I wouldn't advise probing the ECU connector to do the same.

These are the adapted values from my bike.

FRONT BANK CYL 1-2 TPS Sensor 1 Closed 0.47684v
FRONT BANK CYL 1-2 TPS Sensor 2 Closed 4.52576v
REAR BANK CYL 3-4 TPS Sensor 1 Closed 0.48615v
REAR BANK CYL 3-4 TPS Sensor 2 Closed 4.53003v

You've probably read about resetting the adaptives, or something similar. These values actually fluctuate in real-time. The adaptation is an average used by the ECU to determine what a normal value is for that sensor at its closed position. If you have the means you can try resetting the TPS adaptives, but that's a long shot.

I had a similar problem whereas my QS wouldn't work down. I could see the ECU was getting the right values from the QS, that is about 2.5v idle, 1.8v down and about 3.4v up. The fix was the wheel calibration BUT, you must set the value to DEFAULT before performing a new on. Ride to where you can hit 30 MPH for a few seconds. In the menu set it to DEFAULT then do a fresh one. Since doing that I've had zero problems downshifting.
 
bp_SFV4 said:
The problem with downshifting with your gearing change isn't related to the DQS error message on the dash. The DQS error message is related to the limp mode/throttle position/error code problem.

Throttle position in Ducati OBD parlance isn't the twist grip, but the throttle bodies inside of the airbox under the tank. I think the twist grip is called the accelerator or APS

I suppose you could read the voltages the TPS is sending out manually, but that's a lot of disassembly to get there, and again, its under warranty. I wouldn't advise probing the ECU connector to do the same.

These are the adapted values from my bike.

FRONT BANK CYL 1-2 TPS Sensor 1 Closed 0.47684v
FRONT BANK CYL 1-2 TPS Sensor 2 Closed 4.52576v
REAR BANK CYL 3-4 TPS Sensor 1 Closed 0.48615v
REAR BANK CYL 3-4 TPS Sensor 2 Closed 4.53003v

You've probably read about resetting the adaptives, or something similar. These values actually fluctuate in real-time. The adaptation is an average used by the ECU to determine what a normal value is for that sensor at its closed position. If you have the means you can try resetting the TPS adaptives, but that's a long shot.

I had a similar problem whereas my QS wouldn't work down. I could see the ECU was getting the right values from the QS, that is about 2.5v idle, 1.8v down and about 3.4v up. The fix was the wheel calibration BUT, you must set the value to DEFAULT before performing a new on. Ride to where you can hit 30 MPH for a few seconds. In the menu set it to DEFAULT then do a fresh one. Since doing that I've had zero problems downshifting.
Click to expand...

Thank you. I will try the wheel calibration again. I did it a few times when the quick shifter went out, but havent tried it since the engine light and limp mode started
 
I agree with others. If the bike won't rev past 4K, then it is trying to protect itself and has a sensor that is faulty or telling the bike to protect itself. The QS is just part of the electronics being shut down but would not be something that would put the bike in limp mode, IMO. Good voltage from the battery is step one (which you checked), so a dealer visit is probably next unless you have a way to test the different sensors.
 
Just to fill in anyone interested. I took the bike in to Munroe Motors of SF, 11/17. I received the bike yesterday, 12/16. As my OBD reader said, it was the throttle that went bad. To replace the throttle, oem front sprocket, customer provided tires, it was around $1600. Ducati covered $700 of this. To diagnose, install sprocket, and tires, I paid $950. Im in shock in the robbery I was just a victim to. I should have said .... the warranty and paid for a new throttle and installed it myself. That was my first time and last bringing my bike to a dealer ever.
 
on/off said:
Just to fill in anyone interested. I took the bike in to Munroe Motors of SF, 11/17. I received the bike yesterday, 12/16. As my OBD reader said, it was the throttle that went bad. To replace the throttle, oem front sprocket, customer provided tires, it was around $1600. Ducati covered $700 of this. To diagnose, install sprocket, and tires, I paid $950. Im in shock in the robbery I was just a victim to. I should have said .... the warranty and paid for a new throttle and installed it myself. That was my first time and last bringing my bike to a dealer ever.
Click to expand...

Your experience sounds, unfortunately, typical for a Ducati dealership. Glad you got it fixed, though.
 
on/off said:
To diagnose, install sprocket, and tires, I paid $950
Click to expand...

That's about two hours labor for a journeyman mechanic. Their shop labor rate is probably around $130-150? Have you asked the service manager to itemize/justify the $950 labor charge?

It's not just Ducati dealerships. Most brand dealership service departments are the same with their exorbitant labor charges. Not only that, but many are borderline competent.

I have for decades now not taken a bike in for service, routine or warranty items. Luckily, haven't had much go wrong in that time and have been able to fix myself.

Glad it's sorted.
 
wallycycle said:
That's about two hours labor for a journeyman mechanic. Their shop labor rate is probably around $130-150? Have you asked the service manager to itemize/justify the $950 labor charge?

It's not just Ducati dealerships. Most brand dealership service departments are the same with their exorbitant labor charges. Not only that, but many are borderline competent.

I have for decades now not taken a bike in for service, routine or warranty items. Luckily, haven't had much go wrong in that time and have been able to fix myself.

Glad it's sorted.
Click to expand...

$650 of that was the diagnostic fee. Even though, I hooked up my reader and gave them the codes that showed the throttle issues. It's just robbery plain and simple. On top of this, I have been riding my bike just about daily since I got it back. 3 days ago, I got home, parked the bike and about an oz of coolant dripped off of the left side of the bike. I haven't been able to look over the bike as I have been working 16hr work shifts, but I pray to god it's just a hose that needs to be tightened. It leaked when I tilted the bike to about a 45degree angle to move it past the bumper of my car. After that, no more leaking.
 
It quite possibly could be. I tightened 3 of the hose clamps earlier today, ran the bike, and found no further leaking.
 

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