New M59 owner - Strange fault code descriptions

[wishie]

Hi all,

I am the new custodian of a 2008 M59 Berlingo (1.4 petrol). I bought it was a bad misfire (burnt exhaust valve) and have recently rebuilt the top end and put it all back together. The car is running great now, but I have 2 faults stored in the BSI that dont make sense.

Built-in System Interface (BSI) 2 problems exist
1.P0521 Intermittent Fault. Switching From High Frequency Reception To Anti-scanning
2.P0524 Intermittent Fault. RH Sidelamps Control. Short Circuit To +

This confuses me a bit, as P0521 and P0524 relate to an oil pressure switch (or so I thought?) and I assumed would be logged by the ECU, not the BSI...

What is up with those code descriptions? Any ideas?

I also have a fault stored for the heated o2 sensor circuit, but that's fine. I can deal with that.

[Mark604]

Can't help you other than to ask if the fault code then (2008) could now relate to something else due to the change in technology? The first one sounds like being related to the radio for example but the fault it is showing would no longer be possible/exist due to advances. In effect, it's been reallocated to something else.
Just a thought.

[Gryffindor]

Built-in System Interface (BSI) 2 problems exist
1.P0521 Intermittent Fault. Switching From High Frequency Reception To Anti-scanning
2.P0524 Intermittent Fault. RH Sidelamps Control. Short Circuit To +

I tried ignoring the codes and looking at the fault descriptions.

AFAIK (anyone correct me if I am wrong!) there is only one device on an M59 which uses security-conscious wi-fi signals, which is what both "HF reception" and "anti-scanning" can only refer to. That is the remote key fob signal receiver.

I tried googling your phrase in quotes but got no real help; however this post does at least mention "high frequency" and "anti-scanning mode" separately but in the same context. It doesn't relate to a Berlingo but does to a C3 so it is the same family at least:

https://frenchcarforum.co.uk/forum/viewt...hp?t=67487

It's also pre the 2009 PSA switchover from vanbus to canbus. In other words it is the same technology as in your car, not the later generation.

However, I suspect your issue is less likely a programming one and more likely an intermittent electrical connection; perhaps one which feeds a digital 0/1 signal to one of the legs of a processor to switch it between these modes. So that could be a loose component or damaged foil track on a PCB, or a loose connector plug or one with dirty pins.

The sidelight short to + could also be due to a connector needing attention?

[Sol]

Here's a thing, all P codes are Powertrain (engine) so it makes no sense for a P code to refer to anything non engine related. What did you get the codes with? Autel 808?

Those codes are oil pressure fault codes.

[wishie]

Here's a thing, all P codes are Powertrain (engine) so it makes no sense for a P code to refer to anything non engine related. What did you get the codes with? Autel 808?

Those codes are oil pressure fault codes.

EXACTLY. P codes are Powertrain.

I scanned with the THINKTOOL Pro S and the AUTEL MX808.

[wishie]

Built-in System Interface (BSI) 2 problems exist
1.P0521 Intermittent Fault. Switching From High Frequency Reception To Anti-scanning
2.P0524 Intermittent Fault. RH Sidelamps Control. Short Circuit To +

I tried ignoring the codes and looking at the fault descriptions.

AFAIK (anyone correct me if I am wrong!) there is only one device on an M59 which uses security-conscious wi-fi signals, which is what both "HF reception" and "anti-scanning" can only refer to. That is the remote key fob signal receiver.

I tried googling your phrase in quotes but got no real help; however this post does at least mention "high frequency" and "anti-scanning mode" separately but in the same context. It doesn't relate to a Berlingo but does to a C3 so it is the same family at least:

https://frenchcarforum.co.uk/forum/viewt...hp?t=67487

It's also pre the 2009 PSA switchover from vanbus to canbus. In other words it is the same technology as in your car, not the later generation.

However, I suspect your issue is less likely a programming one and more likely an intermittent electrical connection; perhaps one which feeds a digital 0/1 signal to one of the legs of a processor to switch it between these modes. So that could be a loose component or damaged foil track on a PCB, or a loose connector plug or one with dirty pins.

The sidelight short to + could also be due to a connector needing attention?

This vehicle did not come (to me, at least) with a remote central locking key. I also dont believe the car has central locking.. so a key fob signal receiver wouldn't make sense, either..

[Gryffindor]

mmm. The cheapest next step might be to try a different reader. A big issue to try to overcome is that many readers are designed for the US market and from their point of view, these readers will work with just about any make and model under the sun. You just get a throwaway comment in the small print that one or two Euro models might not work with it. Be warned - that includes Citroen! I was unable to find a $$ range reader which is genuinely Citroen-friendly (without buying and testing - I could only afford one). I ended up with a Creader which is supposed to be the bees' knees - but only if you are in the States. It is convince that my 2008 C4GP has a V8 in it!

Maybe someone else can recommend a good 'un. I am aware that decent readers are in the $$$ and even $$$$ range not the $$ range, but even $$$ might save you a lot of time and hassle. Plus you can resell it afterwards - if you can bear to part with it.

My last Berlingo was a 2003 1.4i. It did come with remote keys. Yours might also have done but the keys got lost or broken, and non-remote replacements are always a lot cheaper.

[Gryffindor]

Silly question but were those fault codes showing when you bought the car, can your Autel clear them and do they stay cleared for a week or two and then come back?

My C4GP has a failed O2 sensor and I am convinced that the dealer cleared the code when selling the car, because it (re)appeared a fortnight into my ownership, and I can clear it for a fortnight or so.

[wishie]

So a bit of backstory I guess..

I am an automotive locksmith. I bought the original 2001 Berlingo as a work van. When it blew it's head gasket (at about 256,000kms) I tore it apart and rebuilt it, but was also on the lookout for another van, just incase.. I found this 2008 with a 'bad misfire', fairly cheaply. I talked the owner down even more, drove it home (on 3 cylinders) and stuck a scope down the cylinders.. I found cylinder 3 had a big hole in an exhaust valve.. So I tore that motor apart, and only put it back together a few days ago.

Since then, I've been working through all the small issues you encounter when buying a used car. I do not believe this van has remote central locking (it also does not seem to have ANY form of central locking.. as in, turning the key in the drivers door only opens the drivers door, as an example).

I have yet to take the door cards off to have a look etc though.

The diagnostic scanners I own are not cheap ones, and claim to have "OE level" software. Including for Citroen.

At the end of the day, all I want to try and figure out is.. what the hell is going on? I dont see any issues with 'side lamps' either. I DID scan the code for codes before I bought it, so perhaps I can compare that scan to the fault codes I have listed now.. see if anything differs (well, the fault code for cyl 3 misfire is now gone, thankfully)

[Sol]

The Autel 808 is one of the few which should do OE diagnostics and coding to some extent even on a Citroen.

Gryffindor may have inadvertently been onto something and it's likely what's going on. The old vehicle is VAN bus, which is vastly different to CAN bus. Now the reason most tools don't work on Citroen is they split the OBD socket into DIAG-CAN and CONFIG-CAN unlike most who use the same pins for both. This throws the standard OBD tool as the CONFIG-CAN pins are where the diagnostic ones would be on another brand. That stops it getting any diagnostic codes at all or just rubbish.

Your Autel should cope, but it's maybe talking to the wrong bus and misinterpreting the results. On the early vehicles the OBD pinout is probably not as it is now. Older cars has to use two lines as serial comms called K-Line.

Did you scan for protocols or just use the default on the tool? Don't know enough about the 808 to know if it autoscans, or assumes a pre set protocol.