Recently started hearing rattle sound coming from front of car. Could it be one of the joints. Whilst moving on low revs the rattle appears.

Could be so many things, are you sure it's not the engine, clutch, gearbox?  Could it be a plate or shield, what sort of rattle?

 

A recording of the sound might help with all windows up and a second with all windows down.

 

A second (or more) person listening inside the car and then outside the car can sometimes help with better location area of the noise.

 

Does the noise happen all the time or when the car/engine is cold (or warm/hot)?

 

One thing I always put (that's often not understood or annoys) is your car battery fully charged and in good state of condition (and its connections) as it affects what the computers think and do so much, a computer brain fart here and there might not always show as a code but can be felt by a human, the computers control so much even before you open the car, switch the ignition on and start the car let alone when started and pulling off.  Even if the battery is nothing to do with this issue you want it in good condition before the autmn and winter really kick in.

 

if you have sunglasses in the sunglasses holder by the cabin light this can cause rattling. 

On 16/10/2021 at 08:31, nta16 said:

Could be so many things, are you sure it's not the engine, clutch, gearbox?  Could it be a plate or shield, what sort of rattle?

 

A recording of the sound might help with all windows up and a second with all windows down.

 

A second (or more) person listening inside the car and then outside the car can sometimes help with better location area of the noise.

 

Does the noise happen all the time or when the car/engine is cold (or warm/hot)?

 

One thing I always put (that's often not understood or annoys) is your car battery fully charged and in good state of condition (and its connections) as it affects what the computers think and do so much, a computer brain fart here and there might not always show as a code but can be felt by a human, the computers control so much even before you open the car, switch the ignition on and start the car let alone when started and pulling off.  Even if the battery is nothing to do with this issue you want it in good condition before the autmn and winter really kick in.

 

The battery will only cause errors within the ecu if the voltage is so low that the sensors read out of voltage parameters. Hence you get a Christmas tree when the battery is VERY low / dead. When the car is running however the battery does nothing as the alternator runs the car and charges the battery and will be at a steady 14v. The battery is only used for unlocking and locking, use of electronics when engine is off and starting the car.

7 minutes ago, JGrindel said:

The battery will only cause errors within the ecu if the voltage is so low that the sensors read out of voltage parameters. Hence you get a Christmas tree when the battery is VERY low / dead. When the car is running however the battery does nothing as the alternator runs the car and charges the battery and will be at a steady 14v. The battery is only used for unlocking and locking, use of electronics when engine is off and starting the car.

Yes in absolute ideal world circumstances with a properly built new car but I think a little optimistic with used vehicles, er, being used in the very varied circumstances that can exist.

 

You must also allow for faults, faulty construction, wear, tear and abuse, that's of course without any programming errors or fixes (that can cause other unforeseen issues).

 

When the battery is low but before being dead and Xmas tree displays things can still be off kilter but not enough and within the parameters of the programming not to throw a code - do not put all your faith in the computers and warning lights and messages, many of them turn up too late.

 

A battery that is low will have the alternator working more and with start-stop often a lot of electrics could be running but not the engine.  Also in a used vehicle you have to consider that the alternator is actually working well, in good health and without faults of it's own.

 

A weak battery may also be on top of other issues within others systems and the straw that breaks the camel's back.

 

All these things are ifs and buts but when there are issues, faults and problems sometimes they can be in the  mix.

 

For decades one of the top ten causes of breakdown call outs has ben batteries (and charging systems) until more recent years these would have been mainly caused by driver ignorance and/or neglect as it was rare to get a bad battery, to be fair some of the call-outs would have been for poorer build quality of new cars too.  Now the electrical demand and complication of so many computers and their programming in the vehicles I'd have thought, I don't know as I've not seen any figures or researched it, but I expect these call-out have increased rather than diminished for various reasons.

 

I'm used to very simple cars where if you look after the battery (and that takes very little effort or time) then it looks after you but that's without and any computer system (well except for the dissy).

 

i'm sure we'll continue to disagree about the battery but that's fine,  other viewers can pick whichever suits them.

 

 

10 hours ago, JGrindel said:

if you have sunglasses in the sunglasses holder by the cabin light this can cause rattling. 

It happens when I run on too low of a gear and u can hear a rattle. And the higher the gear ( lower rev) the rattle gets louder so could it be engine mount

4 hours ago, Mj7866 said:

It happens when I run on too low of a gear and u can hear a rattle. And the higher the gear ( lower rev) the rattle gets louder so could it be engine mount

Carry on like that and you might get a rattle from the engine itself. 😄

 

Engine mounts you can often hear at initial take off, worth checking as you know the sound.

 

What gearbox do you have?

 

What service work has been done on the whole car in it's 6 years?

 

Did you get your wipers sorted?

 

On 20/10/2021 at 10:22, JGrindel said:

When the car is running however the battery does nothing as the alternator runs the car and charges the battery and will be at a steady 14v. The battery is only used for unlocking and locking, use of electronics when engine is off and starting the car.

 

Fabia MkIII has stop start and the battery management and use is not as you describe.

 

I don't know the exact figures or processes the battery management uses, but usual charge is to 80% capacity, or thereabouts.

As I understand it that is so you still have some capacity to charge up while braking if the battery is "full".

 

The car runs about on battery if the charge is sufficient until a lower threshold is reached (when regenerative charging hasn't kept charge up enough).

 

If the battery charge is really low the engine tick-over speed is increased to just shy of 1000 rpm and the alternator can then top up the battery a bit.

 

Somewhere on this forum there are pictures of the voltages over several days (2 minute sample rate with a "BM2" monitor) which give some idea of what happens.

 

 

Regards,

 

John H

Whatever system and however it works it does need to be working fully and all parts, components, systems and programs all within their working tolerances (though I expect there might be  some computer program work around, if there is, and it's working).

 

Problems and issues are often because not everything is fully working and often can be combination or permutation of things being slightly, or more, out of whack giving more trouble combined than individually.  It might be that the part(s) are fine but a sensor and/or the computer don't think so or playing up themselves and there's so much crosstalk a slight break in communications and the unwanted guest is sitting at the top table.

 

I wonder if the spanner left in the engine bay, or whatever the cause of the OP, has been found yet?

 

16 hours ago, nta16 said:

Carry on like that and you might get a rattle from the engine itself. 😄

 

Engine mounts you can often hear at initial take off, worth checking as you know the sound.

 

What gearbox do you have?

 

What service work has been done on the whole car in it's 6 years?

 

Did you get your wipers sorted?

 

Wipers sorted.

I'm not too sure about the gearbox but I did some digging and found out one of the links got loose which caused the rattle 

1 hour ago, Mj7866 said:

Wipers sorted.

I'm not too sure about the gearbox but I did some digging and found out one of the links got loose which caused the rattle 

Well done on finding the rattle.

 

It's good to know the problem was resolved and how, you could also say how you sorted the wipers on that thread that way others can learn from it, well done on sorting those too.