Hope you can help.
My dad has an A4 1.8T 1996, he tried starting it after a few 3 weeks yesterday and battery was dead so he jump started it.
Since then the car starts and idles fine however the dash isn’t working, the rev counter spirals out of control and goes to max and mileage is blank.
We have checked the fuses and replaced the battery and no joy, also disconnected the earth wire neat the coils and re-connected.
I have a Sealey VS862 VAG code reader and when I check fault codes for the following appear:-
• 65535 – Control unit failure or internal control module – keep alive memory (KAM)
• 00769 - Coolant Temperature sensor at engine outlet (G82)
o Sporadic – short fuel
• 00771 – Fuel level sensor
o Sporadic – open / short circuit
• 00667 – Ambient Temperature signal
Whilst the VAG tool is connected the Mileage display turns to Kilometres (km) and starts increasing from zero and sign dEF appears.
Don’t know what to now and my dad is stressing! His pride and joy!
Hope someone can help.