Hi

Really hoping that someone has an idea what's going on with my wife's car.

The car is a 12 plate punto evo sporting (1.4 multiair with a turbo)

When driving all of a sudden the car goes into limp home mode, lots of errors on the display mentioning hill hold, esp that sort of thing. If you stop and then restart the fault clears and may or may not reappear. It's stated doing this more and more.

We had the AA out and they replaced the battery but it's still the same. Had it into my mates garage and they cant find any issue. They've seen the fault happen but cant find why. The really strange thing is that it doesn't log any faults.

Hopefully someone will have an idea as all I'm left with is sending her to fiat and that will be expensive.

Hi.
Check the earth cable from battery to chassis and engineb is still good..
They can corrode internally

What's the best way to check this? Multimeter or just buy a new one?

Titch02 said:

What's the best way to check this? Multimeter or just buy a new one?

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https://www.fiatforum.com/grande-punto/318839-electrical-gremlin-thread.html

Will have a look tomorrow. Cheers for that ?

Had a look at the earth cable points everything clear no corrosion on any connections.

It's just odd, when it goes into limp home mode it won't even rev slightly but it does idle. It stopped 5 times in one 10min trip but then after I left it running for 15mins I drove for 30mins and no faults at all.

It's just odd, hate intermittent faults,especially ones that don't leave bloody error codes

Titch02 said:

Had a look at the earth cable points everything clear no corrosion on any connections.

It's just odd, when it goes into limp home mode it won't even rev slightly but it does idle. It stopped 5 times in one 10min trip but then after I left it running for 15mins I drove for 30mins and no faults at all.

It's just odd, hate intermittent faults,especially ones that don't leave bloody error codes

Click to expand...

Personally.. I would add a basic booster cable to the main earth.. beltandbraces

Whats your history with the car?

Just wondering, do you know what piece of kit your garage used to look for codes with? There are scanners and then there are scanners?

I'd want to at least scan it with MES before giving up on that front.

Titch02

Hello. Might see if I can get some jump leads and try it. My wife got the car around September, been fine until the last month

Titch02 said:

Hello. Might see if I can get some jump leads and try it. My wife got the car around September, been fine until the last month

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'Jump leads': heavy cable with BIG croc clips.. handy for 'bonnet up ' work..

But you want lighter gauge cable..household wiring

Get a 2ft length.. and clamp bared sections at the engine and g.box earth points..as I said.. its a 'Booster'

Just to rule out fundamental issues before looking further

Yeah. Nice idea, will give that a go at the weekend. Cheers for that

Sounds like my first "breakdown. No error codes and when it happened again a local garage detected mass air flow sensor fault. It went back to Fiat and they had a throttle position sensor so new peddle fitted. That didn`t cure it and it went back again (3 hours later) for them to find a mass air flow sensor fault. Changed that and the manifold was cleaned . So far so good (4 days)