Re: 156 jtd help engine managementsystem warning light
Depends which sensor Danny, the ECU controls and measures a great many of them.
See if the problem comes back, if it does, take it to an independent specialist and get a diagnostic (fault code) there are hundreds of people on here who will be able to identify the problem from the code (I'm not one I'm afraid)
To reset your ECU yourself (properly).
1 Disconnect Battery - at least an hour
2. Start engine, leave to heat up from cold at idle, don't rev it.
3. Turn off and leave to cool down completely.
4. Done. Have a drive in your 'new' car
Once Loved: 156 2.4JTD SP3