[mdziobas]

Hey,
I have always wondered if those values are correct.
When I check my TPS values (OBD) I get only range from 16% to 84% at maximum depression.

Is this range normal? Do you get the same readings?
There are several % values from TPS, but these are the maximums.

When the pedal is not touched it reads 16%.

Can you check yours?

Edit:
https://www.aa1car.com/library/tps_sensors.htm
Here they say that these values are not normal and this would indicate it is a sensor problem.
I have already replaced throttle body, so the only suspect could be the pedal's sensor. Once a month I get OBD2 code:
P2138 - Throttle position (TP) or Accelerator pedal position (APP) sensor/switch D/E - voltage correlation

I couldn't ever diagnose it under Vida, so I don't know exact Volvo code. It was also not present in unactive/past DTCs, when I plugged it finally in.
When DTC appears I got limited engine power.

Please just someone confirm you've got 0-100% range.

 

[VincentMiata]

Mine also does something like that. the 16% is probably for idle control since these cars control idle rpm with the throttle body. Not sure why the 84% is the maximum

 

[avenger09123]

Yeah you need to replace your pedal.
I had a similar code a while back and resulted in "Reduced Engine Performance" the same as yours.

I took the pedal part to see if I could clean it, no dice.

Get a new/used pedal online.

Mine lives at 14 or 15% with foot off and does have a notch in it when it goes over the notch it goes WOT.

 

[mdziobas]

Yeah you need to replace your pedal.
I had a similar code a while back and resulted in "Reduced Engine Performance" the same as yours.

I took the pedal part to see if I could clean it, no dice.

Get a new/used pedal online.

Mine lives at 14 or 15% with foot off and does have a notch in it when it goes over the notch it goes WOT.

Did it happen only rarely or all the time? The notch, dtcs etc?
In my case it happens maybe twice a month, im wondering if it is not the problem with wiring.
I will try buying used one, the pedal was mounted also in Focus 1.6, it's fairly cheap.

BTW - Maximum in your case was also 85~%?

 

[RR04]

I got kunda similiar problem, once or twice a month i get these faults:
ECM-9530 Accelerator Pedal Sensor
CEM-3F93 Accelerator Pedal (AP) Position Sensor. Signal Too Low
Still thinking if its the pedal or not


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['06 S40 T5 M66]

Hey Volvo freaks

Just came upon this thread as i'm having a similar situation...
Max throttle highest percentage recorded at 86.3% via Torque app, this is testing it with key in position 2 without engine running...
(No pending or active codes set)

Will do road test to see f it can maybe increase depending on load..

Do understand that whilest running it might not go fully as it might become a too lean mixture which the map won't allow, but for testing purposes it is quite strange not to see a 100% full open reading to be able to know that the range is possible and the TB is working as it should...

Will post back if i can manage to get it higher 🤞

06 S40 T5 m66

 

[avenger09123]

I will have to fix something I mentioned earlier - or caveat it to some extent.

Today I checked at idle and while getting on the freeway - my pedal hangs out at ~12.5% at idle and about 85.9 or 86.9% at WOT getting on the highway.
I shut the car off with key in position II and pedal position goes from ~17.5% to ~85.5%.

Given that my last pedal was no lower than 15%, it explains why it flagged codes if it is supposed to hang out at 12.5% at a warmed up idle.

 

['06 S40 T5 M66]

Copy that , not sure if it's worth mentioning but saw similar behaviour lately going in land further away from sea level, idle % at sea level had a 17.8% and 400m (0.25mile) above sea level it was @ 18.6% , both were at 97°C (206°F coolant temp) so air pressure could play a small part as well...

So after restless nights i decided to remove the TB and have a look at the electronic side, opened her up and found everything still looking perfectly clean and dry, the big white gear that's being moved via the electronic motor seems to have a tad of play between gear contacts and might be a culprit regarding travel range but saw no wear on either of the 3 gears inside even though the white gear is plastic running on a metal motor's gear... it may come to the conclusion that our cars might never see a standard 100% throttle range, unless it could be tweaked with Vida to accomodate mods and -builds ?

Would be interesting to see more TB% numbers from other T5 owners just to be able to find a happy medium on your topic

 

[LittleRedRidingHood]

Listening to some content from BD Performance in the UK who specialize in Fords (e.g. Mk2 Focus ST and RS), they stated that Ford doesn't allow the throttle body to open to 100% for "safety reasons". Perhaps they were worried about it getting stuck open... Given the Mk2 Focus ST has an identical engine and tuning (as far as I'm aware), that could explain this behavior.

 

[mdziobas]

Hey, sorry for being late.
In my case replacing the accelerator pedal solved problems.

 

[RR04]

Did you buy a new one? Maybe got a part nr?


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[mdziobas]

4M51-9F836-AH

There you go. It may come also from Ford. You can buy used, just make sure it is working properly.

 

[Problematic]

I was datalogging my '09 C30 T5 yesterday to troubleshoot something else and plotted MAF vs. TP. My max throttle position seems to be 85.5%. On the low end there is only a few data points below 11.8%. I test it later on today to see if it has a "notch" mentioned in response #3, maybe I wasn't mashing it to the floor hard enough during 4 short test drives yesterday. I don't have any of the codes mentioned in the above replies so far.