Technical 2020 Ducato 2.3 180bhp EU6d (adblu)

[rolopolo]

Hi guys
Just a couple or three codes appearing frequently but not constantly, and no warnings etc triggered

P20EE-21 Nox high, possibly

Has anyone please had similar? Are we looking at the adblu injector blocking up etc causing a higher nox reading at the nox sensor, or a nox sensor fault?

P2299-62 Accelerator/ brake coherency signal compare failure?

New Throttle pedal assy/ switch? or brake switch

P1541-22 variable displacement oil pump, signal above max?

Oil pressure switches? Or something else?

Any help or known fixes

Many thanks

 

[Tim UK]

Did you find a solution to this message?
P1541-22 - Variable displacement engine oil pump, signal above max threshold

I haven't seen P20EE-21 and I've only seen Accelerator/ brake coherency errors when pressing both pedals together.

 

[rolopolo]

Did you find a solution to this message?
P1541-22 - Variable displacement engine oil pump, signal above max threshold

I haven't seen P20EE-21 and I've only seen Accelerator/ brake coherency errors when pressing both pedals together.

No mate, just ignored it so far,

 

[slenderpeg]

P2299-62 Accelerator/ brake coherency signal compare failure?
How did you solve this problem please?

 

[Tim UK]

If you have pressed both pedals together you can clear this fault and ignore it. If the fault keeps occurring the best way to diagnose it is to use an OBD tool (e.g. Multiecuscan) to check the values from the throttle pedal and brake pedal switch.

If you don't have an OBD tool you can check the voltages on the brake pedal switch and throttle pedal connector:
The brake pedal switch has one output that changes from 0v to 12v and another that changes from 12v to 0v when the pedal is pressed a small amount.
The throttle pedal has two outputs that change from 0.5v to 2.05v and from 1.0v to 4.2v as the pedal is fully pressed.

It's also worth checking that the brake lights work properly, and if you have an automatic you should only be able to select drive when the brake pedal is pressed. If these are not working properly it indicates a brake pedal switch fault, which may just need to be removed and reset.

 

[slenderpeg]

If you have pressed both pedals together you can clear this fault and ignore it. If the fault keeps occurring the best way to diagnose it is to use an OBD tool (e.g. Multiecuscan) to check the values from the throttle pedal and brake pedal switch.

If you don't have an OBD tool you can check the voltages on the brake pedal switch and throttle pedal connector:
The brake pedal switch has one output that changes from 0v to 12v and another that changes from 12v to 0v when the pedal is pressed a small amount.
The throttle pedal has two outputs that change from 0.5v to 2.05v and from 1.0v to 4.2v as the pedal is fully pressed.

It's also worth checking that the brake lights work properly, and if you have an automatic you should only be able to select drive when the brake pedal is pressed. If these are not working properly it indicates a brake pedal switch fault, which may just need to be removed and reset.

I bought the car on auction and they didn’t mention the problem :/. The fault code won’t get clearared after testing with my Xtool A30M.
Brake light is working, i’ll try to recalibrate the acccelerator pedal tonight hope it’ll help :/.

What else should I do please?

 

[Tim UK]

I haven't used the A30M, but it looks like it has a live data option. Can you use this to see the pedal status?
For the Body Computer faults you should also be able to use it to see the signals that cause the light and window lifter faults.
If the A30M doesn't show the live data and you're going to keep this Fiat vehicle I would invest in Multiecuscan and the ELM327.

 

[slenderpeg]

I haven't used the A30M, but it looks like it has a live data option. Can you use this to see the pedal status?
For the Body Computer faults you should also be able to use it to see the signals that cause the light and window lifter faults.
If the A30M doesn't show the live data and you're going to keep this Fiat vehicle I would invest in Multiecuscan and the ELM327.

I will check after a few hours if my OBD has live data for the pedal, i’ll keep you updated.

 

[Abarthmultijet]

The nox sensor sometimes fails, you can clear the code and after a few hundred/ thousand km's it comes back. It is the black box with a sensor going to exhaust (sensors looks like an Lambda) right when you open the bonnet. Part number 46341847

 

[slenderpeg]

I haven't used the A30M, but it looks like it has a live data option. Can you use this to see the pedal status?
For the Body Computer faults you should also be able to use it to see the signals that cause the light and window lifter faults.
If the A30M doesn't show the live data and you're going to keep this Fiat vehicle I would invest in Multiecuscan and the ELM327.

Accelerator pedal sensor is working. After reading the car my OBD didn’t give any errors but the car was still showing the triangle :/

 

[Tim UK]

I've only looked at the data from a Ducato, but this looks similar. You should see the two brake pedal values change when the pedal is pressed slightly, and you should see the two Accelerator pedal potentiometer voltages (only one shown in the image) change when the pedal is pressed. If they all look consistent then the original 'coherency signal compare failure' should be cleared. The throttle should show 0% (1.0v and 0.5v) when it is not pressed.
If there are other faults (e.g. from the Body Computer) they could be causing the dashboard light.