By YOUCANIC on May 7, 2019
In this guide, you will find instructions on how to diagnose Fiat check engine light yourself.
Fiat Check Engine Light (CEL) may come on and stay on for multiple reasons.
In newer Fiat models such as late model Fiat 500, you will get "HAVE YOUR ENGINE CHECKED" message on dashboard.
The problem could be something as simple as a loose gas cap (fault code P0456) or an indication of another problem ranging from turbo boost issue, engine malfunction or misfire and even transmission problem.
The light itself does not provide much information other than warn you to get the car diagnosed as soon as possible.
Without reading the codes, it is impossible to know why your Fiat check engine light is on.
The symptoms of Fiat check engine light vary.
Here is a list of symptoms you may notice when you Fiat check engine light comes on.
Sometimes you may not notice any performance issues at all.
If you don't notice any performance issues, you can continue to drive your Fiat but get it diagnosed as soon as possible.
Some of the most common problems with Fiat such as 500 are listed below.
Note that there are many more possible problems and hundreds of Diagnostic Trouble Codes (DTC) that can trigger the CEL on your Fiat.
Without diagnosing the vehicle it is difficult to know what the problem is in your particular case.
Instructions on how to read Fiat check engine codes yourself.
The following instructions work on Fiat vehicles manufactured from 1996 to present.
These instricuctions will allow you to read check engine codes on Fiat models such as Fiat 500, 500x, Abarth, Panda, Fremont, Viaggio, Ottimo, Ducato, Dublo, Tipo, Toro, Mobi, Argo, Punto, Panda, Croma, Seidici, Bravo etc.
It is strongly recommended to write down the code and research the problem.
Many owners get a code and start replacing parts based on the code alone.
Later they find out that the replaced part didn't fix the problem.
Don't start replacing parts without doing research on the code first. There are more than one problems that can trigger one code.
If the CEL comes back on again, with a code for a small EVAP system leak, have a mechanic or your Fiat dealer would have to perform a smoke test to find the leak.
You could have a leak at the detector evaporative system integrity module.
It is possible for a leak to develop at the filler neck as well. Without performing a leak test it is impossible to determine where the leak has developed.
If your Fiat check engine light is flashing, it means that the onboard diagnostic system (OBD) has detected engine misfire. In other words, one or more of the cylinders is not working properly.
It is not recommended to drive your Fiat if the check engine light is flashing. Driving your Fiat with CEL flashing can cause more damage to the engine and catalytic converter.
As long as your Fiat check engine light is NOT flashing, it is usually safe to drive.
If you decide to drive your Fiat when the CEL stays on, you should carefully monitor dashboard warning lights and the engine temperature.
Do not drive if the engine is shaking or hesitates when pressing the gas.