Check engine light on???

[Craig_m67]

Did whoever do the oil change reset the service warnings or is the light still on because the car doesn't know it's had a service ??  Easy enough on a 156, I believe it needs access to diagnostics on a 159

Get the ECU error codes read (with the same diagnostic tool that resets the service indicators) to find out why the engine light is coming on and going off. If it's only a minor fault it will clear itself after five starts without error. It's likely something minor