Engine light on and flashing on Fiat Ducato 2: In the second case, it is the one that you have to be the most careful, a flashing engine light tells an necessary engine unit problems, stop immediately the engine unit of your Fiat Ducato 2 or go as soon as possible to your technician. It suggests that there is likely an necessary ignition I have an almost 2.8 turbo Ducato, actually it's a 2005 HDi Boxer but, very similar to the Ducato. 35,000 miles (you guessed it, a motorhome :D ) At high qSF6Rx. My Fiat Ducato 3 litre diesel, has engine light on, occasionally goes off. The engine won't run well on low revs occasionally. Sounds like to me when you driving on corner, engine seems to run rough. It takes awhile to engine to settle. On straight road, it runs no problem. Regards John Fiat Check Engine Light Flashing On and Off. If your Fiat check engine light is flashing, the onboard diagnostics system (OBD) has detected an engine misfire. In other words, one or more cylinders are not working properly. It is not recommended to drive your Fiat if the check engine light is flashing. Information from the Fiat Forum suggests the following explanations for the quoted Ducato-related fault codes: P250A - Engine Oil Level Sensor. P0402 - EGR circuit; Air-flow measured lower than the reference value. P0683 - Pre-Heater Module feedback. P0403 - EGR electrovalve; short-circuit to earth. Normally most lights go off including warning triangle but occasionally this will stay on. Start Engine. Warning light remains on and can do for a few stop starts during longish journey before eventually going out. So issue seems to be with the start systems check, still perhaps related to Oil sensor signal. The tachometer (rpm gauge) gets its information from the engine computer as well as the stability control module, which looks at the wheel speed. The computers compare readings between the engine speed from the crankshaft sensor and the wheel speed to get accurate readings on RPM and MPH.

fiat ducato check engine light