TPMS & Parking Sensor Gremlins - QPV GTS

[makeshiftUK]

... it's evident that my QPV would rather be inside with us by the fire rather than outside in the freezing cold.

TPMS:
For the last few months my TPMS seems to be under-reading - using a manual gauge all the tyre pressures are correct (2.2 bar front, 2.0 rear), but 3 of the 4 sensors say that I'm under by 0.1 or 0.2. Can anything be done to recalibrate them or adjust their sensitivity? I'd rather than vs. driving around with the wrong pressures to satisfy my TPMS.

Parking Sensors:
I've gone from what I think is a dicky sensor at the rear, to the parking system 'unavailable' message on my dash screen, accompanied with a parking sensor logo in yellow. Is this what should happen if a sensor is found to be in-op, it deactivates the entire system?

Cheers

 

[Wanderer]

My two yellow warnings are TPMS and Parking Sensor failures, already chewed a few TPMS ECU's and can't be arsed with the parking sensor so I grown to live with it.

 

[CatmanV2]

0.2 or so bar seems well within the margin of error for a not terribly accurate system. Personally I'd ignore it and focus on the thought that it's meant to alert you to sudden loss of pressure, not be an absolute measure.

Parking system will I think shut down if one of the sensors is totally dead. I'd go for swapping out the one you thought was dicky and start from there.

C

 

[Wagons-Lits]

... it's evident that my QPV would rather be inside with us by the fire rather than outside in the freezing cold.

TPMS:
For the last few months my TPMS seems to be under-reading - using a manual gauge all the tyre pressures are correct (2.2 bar front, 2.0 rear), but 3 of the 4 sensors say that I'm under by 0.1 or 0.2. Can anything be done to recalibrate them or adjust their sensitivity? I'd rather than vs. driving around with the wrong pressures to satisfy my TPMS.

Parking Sensors:
I've gone from what I think is a dicky sensor at the rear, to the parking system 'unavailable' message on my dash screen, accompanied with a parking sensor logo in yellow. Is this what should happen if a sensor is found to be in-op, it deactivates the entire system?

Cheers

how's your battery?

 

[Hawk13]

0.2 or so bar seems well within the margin of error for a not terribly accurate system.

I wouldn't be happy with that - 0.2 bar (or 3 psi) difference is a 10% margin of error from recommended inflation values.

 

[CatmanV2]

I wouldn't be happy with that - 0.2 bar (or 3 psi) difference is a 10% margin of error from recommended inflation values.

I get it, but the function of the device is to alert you to a significant change in pressure. 10% might not be, depending on what the ambient temperature is doing. Plus the fact that the absolute is wrong does not necessarily mean that the consistency is out.

In short, don't use TPMS to set your tyre pressures. Use a proper gauge then calibrate it and forget about it until you check your pressures on a proper gauge again.

Unless it pops up a warning.

C

 

[ChrisQP09]

Bro ever since my sensors went into 'unavailable' mode, they literally work as days warm and fail to work when they get cooler. Italian electrics!

 

[ChrisQP09]

... it's evident that my QPV would rather be inside with us by the fire rather than outside in the freezing cold.

TPMS:
For the last few months my TPMS seems to be under-reading - using a manual gauge all the tyre pressures are correct (2.2 bar front, 2.0 rear), but 3 of the 4 sensors say that I'm under by 0.1 or 0.2. Can anything be done to recalibrate them or adjust their sensitivity? I'd rather than vs. driving around with the wrong pressures to satisfy my TPMS.

Parking Sensors:
I've gone from what I think is a dicky sensor at the rear, to the parking system 'unavailable' message on my dash screen, accompanied with a parking sensor logo in yellow. Is this what should happen if a sensor is found to be in-op, it deactivates the entire system?

Cheers

I suspect you have used the overhead button in the cabin to recalibrate these?

 

[Gazcw]

I suspect you have used the overhead button in the cabin to recalibrate these?

So glad mine hasn't got them. Been a pain in every car I have ever had.

 

[makeshiftUK]

how's your battery?

Battery is (to my knowledge) good, I have it on a Maserati branded CTEK every other week to keep it in shape especially now that I'm not driving her so much during winter.

I suspect you have used the overhead button in the cabin to recalibrate these?

I guess I should have a read through the handbook...

 

[CatmanV2]

Battery is (to my knowledge) good, I have it on a Maserati branded CTEK every other week to keep it in shape especially now that I'm not driving her so much during winter.


I guess I should have a read through the handbook...

Only resets the baseline. There's no function to say 'This is 2.2 bar'

Of course, it might also fix the issue

C

 

[sionie1]

I noticed that my tpms kept triggering from cold. I had them replaced ( they did need replacing) but still it continued. I then had the tyres taken off and refitted, and lo and behold, no issues.

 

[makeshiftUK]

I noticed that my tpms kept triggering from cold. I had them replaced ( they did need replacing) but still it continued. I then had the tyres taken off and refitted, and lo and behold, no issues.

Interesting, mine also only trigger from cold. I will be getting my alloys refurbed in the new year, perhaps removal and refit of the tyres will help me also.

 

[woody1144]

Yeh I get the parking system unavailable message intermittently and one of my rear sensors is a dodgy connection coming back from the dead every now and again so makes sense that it shuts down. Maybe just try replacing it and see what happens. I've just given up on parking sensors, they will only break again.. !

 

[PrestigeAutoworks]

try recalibrating the tpms. As a few have said above, theyre never 100% accurate, and the pressure gauge you may have could also be off a few PSI.

In terms of the Parking sensors, as soon as one starts acting up it eventually shuts the system down ( youll get static beeps then it will just go into parking sensors unavailable). best bet is to get it scanned and the new sensor popped in.

 

[makeshiftUK]

Alright, recalibrated the TPMS using the overhead button and took a short drive yesterday - and all seemed to be well.

Until this morning, when about 10mins into a short drive the TPMS declared 'don't drive' citing unsafe pressure in a tyre. Pulled over, all tyres visually look fine, and checking the pressures manually again at home they're all fine.

So, hit the TPMS overhead button again and sticking the battery on for a good charge in case that's anything to do with it!

What I did find mildly amusing is that the dashboard display can't seem to decide which is more interesting a fault to display - the parking sensors or the TPMS, and kept alternating between the two.

 

[Wagons-Lits]

Alright, recalibrated the TPMS using the overhead button and took a short drive yesterday - and all seemed to be well.

Until this morning, when about 10mins into a short drive the TPMS declared 'don't drive' citing unsafe pressure in a tyre. Pulled over, all tyres visually look fine, and checking the pressures manually again at home they're all fine.

So, hit the TPMS overhead button again and sticking the battery on for a good charge in case that's anything to do with it!

What I did find mildly amusing is that the dashboard display can't seem to decide which is more interesting a fault to display - the parking sensors or the TPMS, and kept alternating between the two.

You say your battery is good, not being sarcastic but how do you know? I've had batteries on CTEKs that say they are 'good' but in reality they were beyond saving. Maybe treat yourself to a new battery as an early Christmas present?

 

[makeshiftUK]

You say your battery is good, not being sarcastic but how do you know? I've had batteries on CTEKs that say they are 'good' but in reality they were beyond saving. Maybe treat yourself to a new battery as an early Christmas present?

Fair comment, although I did buy the forum recommended battery in June this year (EA1000 Exide Premium Car Battery 017TE) - and whilst there's always a chance of that being a duff battery, I don't think it warrants buying another one just yet.

 

[Zep]

My BMW throws TPMS warnings when the weather changes, because the pressure drops with the temperature. I set the tyre pressures when cold and recalibrate and it’s fine from then on.

If you check the pressures when hot and then reset this will tend to cause warnings, as the pressure drops again. From what I can see on my BMW screen, the difference between cold and hot is about 0.2 bar, more than enough to trip the warning.

 

[CatmanV2]

The Maserati system relies on external temperature readings. I would have hoped to avoid that issue....

C