After googling, it seems that this is almost a generic fault with the 307,
and that it is always the offside rear sensor that causes the problem.

Is there any way of getting to see peugeot technical bulletins, because even
the garage staff at peugeot dealers are not computer systems men capable of
understanding
what's really happening?

On Mon, 24 Aug 2009 09:10:00 +0100, "Phil O. Sopher"
<invalid (AT) invalid (DOT) invalid> wrote:

I had the same problem with the offside rear sensor on my 307 HDi SW.
I had it replaced and after 2 months the problem returned.

I looked at the sensor signal with my oscilloscope and found it to be
intermittent. The air gap between the sensor and the ring on the hub
was too big. I loosened the sensor and put a wooden packing piece
behind it to close the air gap a wee bit.

A horrible bodge, I know, but it's worked fine for six months so far.

"Richard Swaby" <reswaby (AT) dsl (DOT) pipex.com> wrote

That's very interesting, because after posting this morning, I did further
googling, found the same suggestion (but using a metal shim, more
professional :-) ). I reported
back to my mechanic and he has just phoned to say that it has resolved the
problem and he's on his way back here with the car.

This does raise serious concerns about the degree of electronics being
fitted to cars. In our case, all the ABS computer can report is failing
sensor
whereas the sensor is OK, the fault being in the mechanical mounting.

There's no doubt that the onset of ECUs into cars has been a "good thing"
(to quote from "1066 and all that") because no more do we have to fart about
with plug and point gaps on wet cold mornings. if the battery is good, then
the
car will start.

The ABS I'm not so sure about because if you're a decent driver, the sort of
braking
problem that might need the ABS is only going to happen every couple of
years, and
then again, if you're trained to handle a skid; still no problem.

The rest of the electronics? Pah!

(Yes, I know that there are 20+ garages in my own home town, but once you've
found a good guy 23 miles away, and have used his services for 19
years, you stick with him!)

The ABS light has now been tested on a 69-mile round trip (mechanic returns
car, I have to take him back and then come home myself)

The sensor was shimmed to make up for the loss of metal by rust, and it is
now
solved after a week of head scratching (and probably very colourful
language; I
dread the bill arriving)

This begs the question as to why the experts at Peugeot do not know the
answer to the problem, but just keep insisting that the sensor needs to be
changed yet again, because that is what their computer system tells them.

There would seem to be a need to start a web-site to publicise wrinkles of
this
nature, and once again to give maintainability back to the
man-in-the-street.

"Phil O. Sopher" <invalid (AT) invalid (DOT) invalid> wrote

Phil O. Sopher wrote:

I'm glad you have got the problem sorted, and thanks for passing on what
you've learned to the group.

I have to disagree with you on the value of ABS - regardless of how
slow, sorry; 'careful', a driver someone may be, there can always be
situations where the friction of the road surface is reduced
unexpectedly (black ice/diesel spills) and a system which brakes each
wheel according to the grip it has will always offer shorter stopping
distances and better stability than a traditional braking system.

For those of us who enjoy driving in a more spirited manner, the
triggering of ABS is more of a daily than a sub-annual occurance. It's
nice to know that, in an emergency braking situation, the correct action
(both for myself and for the majority of other road users) to take is
the instinctive 'stamp on the brake as hard as possible', rather than
having to rely on overiding ones instincts under difficult circumstances
and call on driving skills which, for said careful drivers, are by
definition very rarely practiced.

I mean no offence by any of this; I simply think that ABS is one of the
few benefits of the increasing complexity of cars. EFI and ABS are
pretty much the only gizmos which I think are worthwhile; I would live
happily without trip computers, electric windows and mirrors, heated
seatbelts and general mother-hen like warning bleeps and bongs, and I
would take ABS in preference to airbags as a safety feature.

just my tuppence worth.