Fuel gauge reading

Faults and Technical chat for the Vauxhall Astra K
Post Reply
User avatar
1900sr
Posts: 683
Joined: Tue Nov 17, 2015 4:23 pm
Astra Model: SRi 1.0
Astra Options: None
Astra Colour: Power Red
Location: Lincoln

Fuel gauge reading

Post by 1900sr » Sat Dec 26, 2015 9:41 pm

As posted elsewhere I have an issue with my fuel gauge not reading full. In fact it seems to read low all down the scale. Onstar also reports that the tank is only 91% full when it is reporting a fuel level of 48 litres. The dealer has opened a technical query with Vauxhall but I was wondering if anyone else is having problems with the fuel gauge at all, or knows of anyone else reporting it?
1.0i Turbo SRi, Power Red.

User avatar
astramaster
Posts: 240
Joined: Fri Dec 25, 2015 5:21 pm

Re: Fuel gauge reading

Post by astramaster » Sat Dec 26, 2015 10:39 pm

You did good creating a dedicated topic. Let's see if someone can help! ;)

When you fill the tank completely,
- what information do you get from OnStar application? (post print screen)
- what information do you get from instrument cluster? (post photo)

User avatar
cornishtaz
Posts: 861
Joined: Sat Sep 12, 2015 7:54 pm
Astra Model: 1.6CDTi SRi Nav 136bhp
Astra Options: To many to list
Astra Colour: Power Red
Location: Swindon, 1.6 CDTi 136bhp SRi Nav

Re: Fuel gauge reading

Post by cornishtaz » Sat Dec 26, 2015 10:50 pm

I'll check when I fill up next

User avatar
1900sr
Posts: 683
Joined: Tue Nov 17, 2015 4:23 pm
Astra Model: SRi 1.0
Astra Options: None
Astra Colour: Power Red
Location: Lincoln

Re: Fuel gauge reading

Post by 1900sr » Sat Dec 26, 2015 10:55 pm

I haven't got a pic of the fuel gauge, but it reads approx 7/8 full. It did once read almost full, but after just one mile it was reading 7/8 full.

This is a screen shot of OnStar, this is pretty much what it does everytime.

Image
1.0i Turbo SRi, Power Red.

User avatar
astramaster
Posts: 240
Joined: Fri Dec 25, 2015 5:21 pm

Re: Fuel gauge reading

Post by astramaster » Sat Dec 26, 2015 10:59 pm

Why do you have range in km and capacity in litres? Shouldn't be miles and gallons?

User avatar
1900sr
Posts: 683
Joined: Tue Nov 17, 2015 4:23 pm
Astra Model: SRi 1.0
Astra Options: None
Astra Colour: Power Red
Location: Lincoln

Re: Fuel gauge reading

Post by 1900sr » Sat Dec 26, 2015 11:17 pm

I set it to your foreign units ;) as it's easier to see how accurate it is. As one UK gallon is 4.54 litres and the app doesn't do decimal points it's more accurate to have it in litres. I usually have it reporting in miles, gallons and PSI
1.0i Turbo SRi, Power Red.

User avatar
astramaster
Posts: 240
Joined: Fri Dec 25, 2015 5:21 pm

Re: Fuel gauge reading

Post by astramaster » Sat Dec 26, 2015 11:42 pm

1900sr wrote:I set it to your foreign units ;) as it's easier to see how accurate it is. As one UK gallon is 4.54 litres and the app doesn't do decimal points it's more accurate to have it in litres. I usually have it reporting in miles, gallons and PSI
Ah, ok. Good idea. :)

User avatar
astramaster
Posts: 240
Joined: Fri Dec 25, 2015 5:21 pm

Re: Fuel gauge reading

Post by astramaster » Sat Dec 26, 2015 11:50 pm

If 48 litres is 91%, then 100% would be 52,7 litres.
We know that Astra K fuel deposit's capacity is 48 litres and Astra H/J is 52 litres.
There seems to be some error in the car's programming data related to fuel deposit's capacity.

User avatar
1900sr
Posts: 683
Joined: Tue Nov 17, 2015 4:23 pm
Astra Model: SRi 1.0
Astra Options: None
Astra Colour: Power Red
Location: Lincoln

Re: Fuel gauge reading

Post by 1900sr » Sun Dec 27, 2015 12:01 am

My thought was that the car's software thinks the tank is bigger than it is. I didn't realise the old model had a 52 litre tank, that is interesting.

As you can see from this screenshot the under-reporting stays constant, this one still seems to suggest the tank is approx 52 litres.

Image
1.0i Turbo SRi, Power Red.

User avatar
Razormatt
Posts: 496
Joined: Thu Nov 12, 2015 1:58 pm
Astra Model: Elite Nav 1.4T (150PS)
Astra Options: Parking Sensors
Astra Colour: Carbon Flash
Location: Kent - Drives: Carbon Flash 1.4T Elite Nav

Re: Fuel gauge reading

Post by Razormatt » Sun Dec 27, 2015 12:33 am

Here's mine I filled up Xmas eve and haven't used the car since I do notice the first quarter of my take seems to go down very quick drove less than a mile home from the petrol station so I'm guessing mine is under reading too

One thing I can't seem to get right the recommended psi says 32 but I have it set to Eco so should be 38 which is roughly what my tyres are set to and doesn't matter what load I change the tyres to doesn't seem to update the recommended

Also on the onstar website says ride quality Unknown

image.png

image.png

Carbon Flash Elite Nav 1.4 (150PS) Turbo

Post Reply

Return to “Faults & Technical”

Who is online

Users browsing this forum: Bing [Bot] and 3 guests