Hi.

The check engine light came on, so i took my punto to get a diagnostics, the report came back with 54h84 undocumented.

anyone got any ideas what this could be.

Have heard of it but can't remember what it relates to, will check and get back to you tomorrow

Thanks.

I've taken it to a different garage with an up to date diagnostics machine and it brought back a proper 'P' code relating to a faulty O2 sensor. taking it in to get it replaced so hopefully that will sort out the problem.

do let us know,
thanks, Charlie 2012 TA

Got the lambda sensor changed over 3 weeks ago now and everything seems fine.

good news !!
- out of interest..
what did the part cost..??

Charlie

Fiat wanted about £200 for the part.

The garage i took it to charged around £120 for parts and labour..