Hi guys,

Always had the two airbag lights present on the dash since I got the car a few months ago. I'll be honest, I procrastinated on it a bit because I knew from a friend that the Puntos do have their weird airbag faults.

Just had a look at the codes and I got three through:

14 - Passenger airbag exclusion switch - Interference detected / faulty signal - Intermittent - 14
14 - Passenger airbag exclusion switch - Open circuit - Intermittent - 14
02 - Control unit power supply - Value too low - Intermittent - 94

The entry I'm most concerned about is for the control unit. When I first got the car it's battery wasn't great (winter snow ended up killing it) and I replaced it about a month into owning it. Is it possible the bad battery could've been messing with the control unit? Or am I looking at possibly getting a new control unit (little bit pricey)?

Are there any inspections/tests I can do to see if the control unit is all good?

hi they did go corrupted and the cheapest solution was a s/h ecu,disconnect the battery before swapping out,should be cheap on ebay now make sure numbers match the switches caused resistance issues too i used to clean them by turning on and off 30 times

Fiat produced a replacement wire harness to correct this problem. It plugs in at the Air Bag on/off switch on the end of the dashboard & replace a wire (pink) to the airbag ecu & comes with a new earth ring that secures under one of the air bag ecu bolts. It used to cost about £8 or £9 from a Fiat main dealer but they can be found on ebay. Simple replace the wire harness, reset the airbag ecu & the problem goes away for good. There is an instruction video on youtube, just search Fiat Punto airbag. There could even be a link on here somewhere.

alan01256 said:

Fiat produced a replacement wire harness to correct this problem. It plugs in at the Air Bag on/off switch on the end of the dashboard & replace a wire (pink) to the airbag ecu & comes with a new earth ring that secures under one of the air bag ecu bolts. It used to cost about £8 or £9 from a Fiat main dealer but they can be found on ebay. Simple replace the wire harness, reset the airbag ecu & the problem goes away for good. There is an instruction video on youtube, just search Fiat Punto airbag. There could even be a link on here somewhere.

Click to expand...

They aint that cheap now im afraid...
There more like 30.... because number on road now is low....

The passenger switch is caused by a poor earth and causes issues

Ziggy

Sent from my SM-G920F using FIAT Forum mobile app

Not surprised on the price increase. I had the same problem on my Niece's Punto. Only took an hour to cure it & in the time she had the car it never came back.


Video on how to fix it including part number:

Check the passenger airbag on off switch and clean it. and the clock spring under the steering wheel