488 fault codes - Low voltage - O2 Sensor

[MaverickV12]

Hello 488'ers, and 2015 onwards California T'ers (same engine)

Something recent has popped up. If I hit the fast peddle, and make the lights on the steering wheel light up. I get an Engine Management light appear, something about, "take to dealer".

I read the codes, P0137 and P0157,



Now, performance is unaffected, its still wicked and there is no LimpHomeMode.

Anyone know what this could be, its slightly confusing as its both O2 sensors, on both banks of the V8.

I have heard of a Turbo cracking and allowing air in, but this causes a LimpHomeMode fault.

If I drive normally, which is 95% of the time, I get nothing, but as soon as I light the steering wheel up ...... O2 sensor faults.

To those without a Turbo on their Ferrari, the Turbo only cuts in at 4000rpm this allows 95% of driving and really 100% or normal driving with no Turbo Boost at all. We have a button that shows how much boost is being blown, below 4000rpm, its zero.

Anyone had the same problem?

Thanks

[MaverickV12]

Started to research different reasons for the O2 sensor issue. I didn't just want to take it to Ferrari.

Looked at all the codes and would clear them and see what came back

Consistently came back as Bank 1 Sensor 2



In the end had 3 different codes for the same sensor.

Expecting a sensor to cost an Arm&aLeg, only to find that they were £61.00 from Ferrari, so I bought one



Thinking I was clever and ahead of the game, I already had a WorkShop Manual, no Index, so that was helpful, page by page I went through the manual and find that .....



They had not written about it yet .....



I could also not find what Bank 1 was.

Does anyone know which Bank of cylinders is, "Bank 1", my car is a RHD, UK Spec, so is it drivers side or passenger side?

[johnnyreggae]

Can't find specific for your car but on 360 & California etc Bank 1 is cylinders 1-4 which is on RHS (UK drivers side)

Edited by johnnyreggae on Tuesday 11th July 08:33

[MaverickV12]

johnnyreggae said:

Can't find specific for your car but on 360 & California etc Bank 1 is cylinders 1-4 which is on RHS (UK drivers side)

Edited by johnnyreggae on Tuesday 11th July 08:33

Thank you, I have been reading the same. We will find out soon when I come to change it.

Incidentally the California T (2014-17) uses the same engine, but up front and detuned, but never explored if its turned back to front or not.

[MaverickV12]

OK, for the avoidance of doubt, on the Ferrari 488, Bank 1 is on the right hand side of this picture



So in the UK or Australia, Bank 1 is the drivers side, in the US or Continental Europe, its the passenger side.

This is the O2 sensor on Bank 2, its relatively plain to see



But if you look at Bank 1, you can't even see it.



You could do this yourself, but I decided to go to a AutoElectrican, I have had previous very good results with these guys

https://www.westlecautoelectricalltdbristol.co.uk

The guy there likes Harley Davidson Bikes too, so that's a bonus.

You'll need a ramp to really carry out the work



The guy who did the work is called Jerry Skuse, and he said that he considered going in from the top, but access below seemed favourable, he said he used a Sensor Socket, I didn't know these existed



He said he had to warm up the exhaust first as the Sensor was stuck solid, once warmed up he had very little room to manoeuvre, and not forgetting that the exhaust was hot too, but managed to get it out and replace it very successfully.



To be fair, the guy is a professional and he's been replacing Sensor for many years, so a decision to, "let a professional do it", was a very good one in this instance.

Went out later that day, and she drove perfectly, no EML lights coming on, for the costs of it, I wish I had replaced both sensors now, but at least we/he/me knows how its done now, so it'll be quicker anyway.