Obd 2 Diagnostics

[dablik]

Ford Fiesta 07 think it's MK5



Anyway sure its a generic code which is



P0300 HO2 Bank sensor 1 1 Heater Circuit, the code cleared even though my Diag tool showed Erase/Fail, car started numerous times with no return until I filled up today, air escaping when I removed the fuel cap, light on again and same code, cleared code, light gone, fuel cap off,light on,now cleared light again, will see if it comes back this week.



Also DIAG tool showed 1/2 faults this time the 2nd being P0300 P and can't find any reference to that ??



So I know the code is only an acknowledgement of an issue and won't necessarily need a new O2 sensor, typically the cars due it's mot in the next 8 days, any thoughts or am gonna have to bite the bullet and have a Diag test at mot time, EML is an mot fail..



Could it simply be a naff fuel cap with a pressurised system!!



Prolly all a bit complex innit..



Edit...actually I just thought either way it's gonna have an emissions test at mot so if there is an issue then it will need a Diagnostic check anyway won't it.

This post was last modified: 19-01-2021, 02:19 PM by dablik.