Auto gearbox ECU is draining the battery
2008 Renault Laguna 2.0 t tourer

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Michael Scott
Driver
1 points

Problem added: Aug 20, 2021 (3 weeks ago)
Automatic gearbox on my 08 Laguna 2.0t petrol is showing fault ECU bad earth and is draining the battery.
Local garage has had the car for three weeks and can't find the fault
Any clues?
Car: Renault Laguna
Variant: 2.0 t tourer
Model Year: 2008
Category: Gearbox & Clutch
Electrics, ECU, Warnings & Lights
Replies and Fixes
Avatar
whittingehame
Legend
21,026 points

Aug 20, 2021 (3 weeks ago)
Tried cleaning up earthing or running a new earth from unit body ( if possible .) and carried out a parasitic drain test to verify that is where the fault lies .Check wiring harness , Renault electrics are not the best
Avatar
Michael Scott
Driver
1 points

Aug 20, 2021 (3 weeks ago)
Thanks I'll pass this to my garage
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Parts mentioned on this page
Battery
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Automatic Gearbox
Click to read more about the part & problem symptoms
Gearbox
Click to read more about the part & problem symptoms

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