Oil light low pressure

[Hecktor]

I have an oil light on it’s the red one, only comes on when oil temp reaches 96, I’ve had switches changed oil filters and new oil pump but still comes on 

[Hecktor]

Just now, Hecktor said:

I have an oil light on it’s the red one, only comes on when oil temp reaches 96, I’ve had switches changed oil filters and new oil pump but still comes on 

Can anyone advise please 

[chrisund123]

What engine is it?

[Hecktor]

1.6

[Hecktor]

I’ve had oil filters changed switches oil pump sump cleaned it only comes on when oil temp goes up to 96 and more, cars running ok but it’s a taxi and it will fail test with this problem it’s doing my head in now 

[Hecktor]

I’ve had oil filters changed switches oil pump sump cleaned it only comes on when oil temp goes up to 96 and more, cars running ok but it’s a taxi and it will fail test with this problem it’s doing my head in now  it’s 2012 1.6 green line 

[langers2k]

An oil temp of 96'C shouldn't cause an issue.

 

Likely guesses:

- low oil pressure

- faulty oil pressure sensor

- damaged wiring to the oil pressure sensor

 

Given it's seemingly easy to reproduce, you should use VCDS or similar to do some live diagnostics and ideally compare the oil pressure sensor reading with a separate, calibrated gauge.

[Breezy_Pete]

Which oil is being used?

Oh, and please confirm, 1.6 diesel, yeah? CAYC engine code?

Edited 16 October, 2019 by Wino

[Hecktor]

I’ve had oil filters changed switches oil pump sump cleaned it only comes on when oil temp goes up to 96 and more, cars running ok but it’s a taxi and it will fail test with this problem it’s doing my head in now  it’s 2012 1.6 green line 

[Hecktor]

Yeah diesel and using right oil 5w 30 it’s been going on since June that’s why had pump changed but probably didn’t need to 

[Breezy_Pete]

There's more to the right oil than just 5W30, can you be more exact about what is in there? Needs to be 507 00 rated.

[Hecktor]

All I know is I give my reg and they give me right oil and mostly mechanic sorts it 

[Breezy_Pete]

The exact oil used should be identified on invoices.

Do you know if the drive belt (item 7 here) for the oil pump was changed at the same time as the pump? Presumably the 'suction line' item 3 was also changed or at  least cleaned out?

[Hecktor]

I presume so 

[Hecktor]

He said he changed oil pump and timing belts etc it lasted 3 days the light came back on but before it was on constantly I’m just fed up of it now nobody seems to know what it is and it’s just a money pit 

[Hecktor]

Presuming all is done proper but still getting this is there anything else it would it need new engine

[Hecktor]

Also when dpf is going through it’s cycle which is more often than not that’s when oil temp goes up 

[Breezy_Pete]

 

8 minutes ago, Hecktor said:

Also when dpf is going through it’s cycle which is more often than not

That could be the problem. If the DPF is getting very full of ash, it will trigger regens frequently. As well as getting everything hotter, this may be getting a quantity of diesel into the sump, diluting the oil and making it harder for the pump to pressurise enough.

How many miles on the car, and any history of DPF replacement?

[langers2k]

@Hecktor - slow down and read my earlier post.

 

Have you confirmed if the oil pressure is low when the oil pressure light comes on using a separate, calibrated gauge?

[Hecktor]

Yes he checked oil pressure and was showing low 

That’s before pump was changed 

[Hecktor]

Dpf is regenerating about 4 times a day 

[Breezy_Pete]

How many miles are you travelling in that time?

 

[Hecktor]

I do around 100 mile a day 

[Breezy_Pete]

In that case I think this comes down to the DPF ash fullness. You can get an app that will let you look at these things, don't know much about it myself, but someone else will be able to tell you I hope.

[langers2k]

VAG DPF app is normally used on Android with a suitable BT OBDII dongle. Not sure what iOS options there are.

 

How many miles has the car done and did it have the VAG 'emission fix' applied?