Technical Fiat 500 1.2 lounge 2013 engine management light.

[KMJ]

Has anybody had a similar problem.
This is an intermittent fault which can sometimes causes the engine to go into limp mode. By turning off the ignition and turning back on the limp mode is cancelled but the warning light remains on. Engine will run fine for a few minutes and then go back into limp mode. Two independent garages have code read this and both changed the ignition coil, plugs and plug leads. However, the fault persists but may not occur every journey.
Fault codes read were:-

Engine Management
P0302 - Cylinder 2 ignition failures
P0303 - Cylinder 3 ignition failures
P0300 - ignition failures recognition
P0136 - Lambda 1 signal below catalyst

OBD11 Codes
P0302 - cylinder 2 misfire detected
P0303 - Cylinder 3 misfire detected
P0300 - Random/Multiple Cylinder misfire detected
P0136 - O2 Sensor Circuit Bank 1 Sensor 2

 

[steveras57]

So what do we have here then! well If the plugs leads and coils have been changed and it is still the same its unlikely ti be those then!
We have misfires on cylinders & 2&3 (p o 302& po303) which is confirmed by POO300
The E C U is not getting the values it expects from the post cat Lambda sensor PO136 which is confirmed by OBD 11 code PO136 also so going on this info I would suggest that the first thing to try is changing the post cat lambda sensor once done if it cures the issue YIPPEE ! all good however if not it needs re-scanning to see what codes come up?, If there the same then it could be a wiring or E C U issue if different then its pointing you in another direction! let us know what you find out! good luck!.

 

[John202020]

Lambda might be this one, but check

Lambda Sensor LEB5417 Lucas Oxygen 55220254 55246661 55249876 55249880 1846118 | eBay

FIAT 55220254, 55246661, 55249876, 55249880. LANCIA 55220254, 55246661, 55249876, 55249880. Lambda Sensor LEB5417 Lucas. Part Number LEB5417. LUCAS CAV LEB5417. FORD 1846118, ES519G444CA. Lambda Sensor Lambda Sensor.

www.ebay.co.uk

 

[Gareth Crossland]

I was getting similar on my 2014 pop. Seemed to happen when I went over about 3-4k rpm. Started misfiring, dash lit up like a Christmas tree. Turning off then back on Seemed to cure it until next time the revs went high. Had plugs and coil pack replaced. Mechanic checked all the wiring and came to the conclusion that the ECU was faulty. I bought a virginised ECU from ebay, popped it in and haven't had any further problems. Good luck.