Hi, my EL Fairmont trip computer no longer shows distance to empty. Last week the car did a ignition coil and I had the battery disconnected for the weekend, its all running fine now but distance to empty always reads zero.

The fuel gauge on the dash works fine as do all other trip computer functions.

The car has Tickford LPG and I know the computer doesnt function on gas but it worked on petrol fine up till the battery was disconnected. I have a full tank of petrol but still DTE reads zero.

Wondering if there is some reset or what to look for
Thanks