idaeagle4
Fiat Doblo ECU Fault
Summary of the thread
A 2021 Fiat Doblo with 86,000 km is experiencing reduced engine power and an error code indicating a potential ECU fault. The issue might be caused by a defective ECU, possibly due to a faulty main relay. After professional diagnosis, the main relay was identified and replaced, resolving the problem and restoring the vehicle's performance.
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4 comment(s)
idaeagle4 (community.author)
Thanks for the info! Yes, it's showing error code P0606 - 'ECU Processor Fault'. Does that align with what you experienced with your Astra?
luise_wolf1
P0606 rings a bell, though I don't recall the exact code. Given that you've got that code and power loss, I'd suggest getting the ECU checked by a professional. It could be a repairable relay issue or something more serious within the ECU itself. Best to have it diagnosed properly before throwing parts at it.
idaeagle4 (community.author)
Took your advice and brought it to a workshop. Turns out it WAS the main relay! They replaced it, cleared the codes, and now it's running like new. Total cost was around 120€ Thanks for the help!
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FIAT
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DOBLO
luise_wolf1
Interesting. I had a similar experience with my Opel Astra a few years back. Reduced power, error codes galore! It turned out to be a flaky relay causing intermittent power loss to the ECU. Is your Doblo throwing any specific error codes?