Ds3 engine fault and SERVICE light on

[T22nyb]

Hi iv got a 2012 ds3 1.6hdi and its coming up SERVICE light, engine fault and stop start eco doesn't come on at all , sometimes the lights come on and sometimes they don't and it all works fine, iv had the battery tested and its all good apparently, thanks for any help

[pmk]

I've had exactly the same - "ECO disabled", "SERVICE" word on dash and "Engine fault repair needed". I brought myself a CTEK CT5 Stop/Start battery charger and charged the battery which helps but I think a few key cycles and drives are required in order for the ECU to detect a strong battery voltage. Putting a OBD2 dongle on detects no fault codes.

I barely use my car now just one weekly trip to local supermarket and mine has the original battery (same year as yours and mine is a diesel too).