Hi guys im looking for some help I have a 2000 plate fiat bravo sx80 Im having issues geting it thru an mot as its failing on emissions so the garage put it on a diagnostic 3 pin in engine bay any there was no power going to the port does anyone no if there is a fuse that could of blown causing this issue any help would be much appreciated thanks

puntodiesel87 said:

Hi guys im looking for some help I have a 2000 plate fiat bravo sx80 Im having issues geting it thru an mot as its failing on emissions so the garage put it on a diagnostic 3 pin in engine bay any there was no power going to the port does anyone no if there is a fuse that could of blown causing this issue any help would be much appreciated thanks

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Hi,
Neverth, and blue john, are often the ones in the know on old Bravo /a issues,

Charlie

varesecrazy said:

Hi,
Neverth, and blue john, are often the ones in the know on old Bravo /a issues,

Charlie

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bluejohn125..??

and @ Adrian Bravo too,

good of ben to add the Bravo owners historic stuff too,could become a useful resource,

Charlie - Oxford

Hi thanks just messaged them

On my Bravo, the 3 pin isn't powered - you need to run cables to the battery to power the diagnostic port...

Same here. My 3-pin adapter has ground and power leads for connecting it to the battery.

As ben said the diagnostic 3 pin port does not provide power.

This image has the location for the 1242cc 1.2 1998 and onwards. Item 15.

Last time I asked my local Fiat franchise they wanted £65 to read the ECU I got an independent garage to read it for £25. Still might be worth ringing your local Fiat

Well all the diagnostics on my 2001 Mk2 Brava 1.2 have been done via a diagnostic port in the cabin, through a panel below the dash by the drivers right knee. Never used one in the engine bay (on the older Tipo - yes).

Your car should have 2 lambda probes at the top and bottom of the Manicat (combined manifold and cat converter). The chief suspects for high emissions is failure of one of these - probe failures should be indicated by a diagnostic check. The Cat will be pretty old by now but may still be OK or if it's found to be marginal (with gas analysis assuming the electronics etc are OK) then you may be able to refresh it with a can of Cataclean.

Check the usual things like plugs and leads of course...

Does yours have the fly by wire throttle or the cable one Bluejohn?

bluejohn125 said:

Well all the diagnostics on my 2001 Mk2 Brava 1.2 have been done via a diagnostic port in the cabin, through a panel below the dash by the drivers right knee. Never used one in the engine bay (on the older Tipo - yes).

Your car should have 2 lambda probes at the top and bottom of the Manicat (combined manifold and cat converter). The chief suspects for high emissions is failure of one of these - probe failures should be indicated by a diagnostic check. The Cat will be pretty old by now but may still be OK or if it's found to be marginal (with gas analysis assuming the electronics etc are OK) then you may be able to refresh it with a can of Cataclean.

Check the usual things like plugs and leads of course...

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Adrian Bravo said:

Does yours have the fly by wire throttle or the cable one Bluejohn?

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thanks all for helping clear this up,

only logical that with only 3 wires it can't carry comprehensive stuff..!!:idea:

Charlie - Oxford

Mine is fly-by-wire as far as I know... has all the revised bits for the mk2 engines e.g. cam sensor (cable on top of the cam block) and twin lambda arrangement etc. Should be the same setup as the OP's car I'd expect.

Thanks for the info lads it's a great help if I need to power the diagnostic port from the battery where abouts do I need to connect the power up to

You need to...

1 Carefully read and understand the info you've been given

2 Learn the configuration of your actual car as regards the engine / ECU / lambda / diagnostics setup (specifically is it the later type - probably)

3 Take the car to a proper garage or Auto Electrician who can do the diagnostics correctly and ideally analyse the exhaust as well

Taken car to a garage nothing showed on the diagnostic mechanic carried further inspecting and this that the cat is to blame and possibly the lambda sensor as its a universal lambda which apparently dont work correctly on fiat

Need to be sure what cat setup you have on the car... the older 1.2s had a single lambda and a cat underneath the car at the end of the downpipe... these are fairly cheap to buy but of course quality can vary.

Later cars like mine (and probably yours) have the cat and exhaust manifold as one combined unit right at the front of the engine, these can be very expensive but I got a very good quote for mine from the Catman (UK made good quality for £130 or so plus delivery). Note that depending on the reg date of the car you may get away with a slightly cheaper one... after March 2001 or something the emission standards changed (and CO2 tax bands came in) so the cats now need more expensive materials in them to comply. This affects mine but probably not yours.

As for the pattern lambda probes... these can be dodgy and need the wires adjusting but they should work, however the best bet is to pay a bit more and get a proper Bosch or NTK unit. But make sure you can trust your garage / electrician to correctly diagnose the probe as faulty (and your car may have 2...)

It depends which emissions quantities in the exhaust are too high, this will indicate whether the faulty probe is messing up the ECU (CO or Hydrocarbons too high) or the cat is just not cleaning effectively any more.

If you trust the garage then cough up and fit decent new parts, you (or someone else) has had value out of the old ones in any case.

The cat I have is the older type also only one lambda. I'm going down the root of keeping it as cheap as possible garage quoted me £240 to replace.This was a fiat specialist so I knew it would be expensive. I have purchased the parts I need off the net bit risky I know but it's gona cost me third of what I was originally told the car should be bk in for retest the end of this week will let you know the results