Jump to content
Do Not Sell My Personal Information

Petrol gauge is incorrect in cold weather


Recommended Posts

Just recently I have noticed that my petrol gauge shoots right past full in cold weather when the engine starts and then when switching off it will go just above empty. The following day when running it on a warmer day it went back to normal.

Link to comment
Share on other sites

Hello Jaime, the signal from the fuel sender unit in the tank is via a variable resistor. When the tank is empty the resistance is very high (almost open circuit), and when the tank is full the resistance is very low (almost short circuit). I've not had any dealings with your model but it would suggest that the wire to the gauge is in some way being connected to the vehicle ground/body which causes the gauge to read more than full. Possible things to check would be the connector on the fuel tank to see if it is wet or if the wire is damaged and able to rub against the metal work of the car. Have you noticed if the gauge reads wrong if the car is wet, heavy rain, going through puddles ?

You can also use the built in dial sweep function of your instrument cluster to test the actual gauge which you try both when things are normal and when there is a fault.


Link to comment
Share on other sites

Latest Deals

Ford UK Shop for genuine Ford parts & accessories

Disclaimer: As the club is an eBay Partner, The club may be compensated if you make a purchase via the club

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...