Hi all.

 

Have decided to replace my oil pressure switches as I keep getting a Low Oil Pressure light come on, scanned and came back as a faulty switch.

 

Have replaced the 2 on the front left side (blue/brown) but there's one more and I have no idea where it is.

 

Does anyone know? Picture attached.

 

Engine is 2014 2.0 TSI

Thanks all

IMG_0444.heic

The two on the filter bracket are high and low units usually blue and brown. Did you replace those with genuine items or known aftermarket products or pattern parts?

 

I believe there maybe a third oil pressure sensor "level 3 sensor", on the front of engine near the water pump.  I'll see if I can get a diagram off the self study program. 

On 21/10/2023 at 15:21, vRSRutty said:

Hi all.

 

Have decided to replace my oil pressure switches as I keep getting a Low Oil Pressure light come on, scanned and came back as a faulty switch.

 

Have replaced the 2 on the front left side (blue/brown) but there's one more and I have no idea where it is.

 

Does anyone know? Picture attached.

 

Engine is 2014 2.0 TSI

Thanks all

IMG_0444.heic 1.54 MB · 6 downloads

Part 2 reply.

 

Further to my initial reply.

 

Looking at the self study vw guide, which is quite informative, although may not be 100% accurate on every engine derivative, it indicates what it calls a Level 3 oil pressure switch around the back of the engine, near the timing cover and exhaust cam (uk) driver side. It will be hard to see if it is there, because of the Turbo and the need to look up and over the back of engine... 

 

See below self study posting.  What the guide also caveats with is,  not all gen 3 ea888 derivatives have the piston cooling jet control system and this extra oil pressure sensor is there to monitor the functionality of that system activation. I.e. confirm piston cooling jets are getting oil at appropriate pressure when called for.  I can say the golf r that i have does have the piston cooling jet system. As for Octavia vRS I would assume it does so, as mk7 golf GTIs have it but I can not guarantee it.  Looking at parts listing for the Oct vRS for the N522 would confirm it.

 

What is also a little strange is, in the Golf mk7 R workshop manual it seems to indicate the position of the L3 oil pressure switch is actually besides the waterpump on front of crank case.  This clearly contradicts this self study location. I will post the workshop manual excerpt separately so you see what i mean.

 

 

Item 12 in this workshop manual diagram. Completely different location!!

 

@TheClient, the OP dual-posted on this issue, the other thread being here: https://www.briskoda.net/forums/topic/517425-reduced-oil-pressure-switch-location/

I think you've arrived at the same conclusion.

 

7 minutes ago, TheClient said:

Item 12 in this workshop manual diagram. Completely different location!!

 

After being under the car and trying to find it, and with the help of @Breezy_Pete on Wednesday, can confirm the 3rd switch is here.

 

Thanks for further clarification @TheClient!

 

Will be replacing it Saturday morning

Edited 26 October, 20232 yr by vRSRutty
Clarification

48 minutes ago, vRSRutty said:

After being under the car and trying to find it, and with the help of @Breezy_Pete on Wednesday, can confirm the 3rd switch is here.

 

Thanks for further clarification @TheClient!

 

Will be replacing it Saturday morning

Oh great. Good work. Only thing I will add, is,  given that is the L3 oil pressure switch and the described function and purpose -  I am assuming your error oil pressure switch code relates to oil cooling jet or something related. Maybe it is just general so it is a best guess on basis other two have been replaced.  Oil cooling jet pressure monitoring seems to be the sole focus of that additional oil pressure switch!

OK. I've read through that thread.

Error you posted in other thread:

 

Oil Pressure Switch for reduced Oil Pressure
P164D 00 [032] - Malfunction

 

My concern is that description is very specific, and is the exact description used in the workshop manual for the lower oil pressure sensor on the oil filter bracket in both the self study guide and workshop manual.

 

I.e. The brown unit. See above diagrams for F378.

The two units are used due to the two stage oil pump pressure.

• My first instinct is wiring fault or replacement item faulty.
• My second instinct would be a genuine oil pressure out of range problem but ecu reporting switch faulty...
• My third instinct would be to try and replace the third one you had trouble locating but this is exlcusively for the piston cooling jet nozzles as far as I can read on the function.

 

 

3 minutes ago, TheClient said:

OK. I've read through that thread.

Error you posted in other thread:

 

Oil Pressure Switch for reduced Oil Pressure
P164D 00 [032] - Malfunction

 

My concern is that description is very specific, and is the exact description used in the workshop manual for the lower oil pressure sensor on the oil filter bracket in both the self study guide and workshop manual.

 

I.e. The brown unit. See above diagrams for F378.

The two units are used due to the two stage oil pump pressure.

• My first instinct is wiring fault or replacement item faulty.
• My second instinct would be a genuine oil pressure out of range problem but ecu reporting switch faulty...
• My third instinct would be to try and replace the third one you had trouble locating but this is exlcusively for the piston cooling jet nozzles as far as I can read on the function.

 

 

Interesting stuff. Thanks for that. 

 

Will try replacing it anyway and see if it changes anything!

1 minute ago, vRSRutty said:

Interesting stuff. Thanks for that. 

 

Will try replacing it anyway and see if it changes anything!

Yes, see how you go. Based on what I've read it points to the brown unit on the filter bracket to me. But i've been wrong once or twice before. And the info is not perfect. Good luck. Come back with what you find!!

18 hours ago, vRSRutty said:

Interesting stuff. Thanks for that. 

 

Will try replacing it anyway and see if it changes anything!

Just thinking a bit laterally.

 

What you could do, before removing the third oil pressure sensor or buying any replacement parts, is disconnect one at a time the various oil pressure sensors and do a code read each time. a open cct fault should be logged each time. 

 

That should then give you the descriptor the ecu is using for each of the three sensors. This may be helpful and low effort and low cost! 

On 26/10/2023 at 17:21, TheClient said:

Yes, see how you go. Based on what I've read it points to the brown unit on the filter bracket to me. But i've been wrong once or twice before. And the info is not perfect. Good luck. Come back with what you find!!

 

Replaced the third sensor - no luck!

 

Still shows the light when moving at low speeds/idle but goes away as soon as I get 8+ mph.

 

The brown switch already been replaced but it's not an OEM switch. I may try removing it today and scanning as you suggested.

 

Thanks!

Edited 30 October, 20232 yr by vRSRutty

On 26/10/2023 at 17:21, TheClient said:

Yes, see how you go. Based on what I've read it points to the brown unit on the filter bracket to me. But i've been wrong once or twice before. And the info is not perfect. Good luck. Come back with what you find!!

 

Following this, asked the guy that replaced it what part he used, he's used a 0.3-0.6 bar switch when it's meant to be 0.55-0.85 bar.

 

This'll be the issue I imagine.

20 minutes ago, vRSRutty said:

 

Replaced the third sensor - no luck!

 

Still shows the light when moving at low speeds/idle but goes away as soon as I get 8+ mph.

 

The brown switch already been replaced but it's not an OEM switch. I may try removing it today and scanning as you suggested.

 

Thanks!

Interesting. Yes, I'd remove it add see what's reported. I feel it is almost certainly on that circuit now. Whether its wiring, a faulty sensor or genuine pressure issue. Still don't know for sure. The reduced oil pressure sensor switches to the blue one after certain rpm. I'll see if I can find the parameter out of interest. 

4 minutes ago, vRSRutty said:

 

Following this, asked the guy that replaced it what part he used, he's used a 0.3-0.6 bar switch when it's meant to be 0.55-0.85 bar.

 

This'll be the issue I imagine.

Ok. It could well be incompatibility -  as the ecu is reporting it doesn't like it. Presumably the fault may also be logged without starting the emgine, I.e. just on circuit testing... edit.  although, normally a switch is just a switch and using the wrong  low pressure spec would just mean you risk running below acceptable pressure without the oil pressure light showing. E.g. say beteeen 0.3 and 0.5ba by using wrong spec.  

Edited 30 October, 20232 yr by TheClient

4 minutes ago, TheClient said:

Ok. It could well be incompatibility -  as the ecu is reporting it doesn't like it. Presumably the fault may also be logged without starting the emgine, I.e. just on circuit testing... edit.  although, normally a switch is just a switch and using the wrong  low pressure spec would just mean you risk running below acceptable pressure without the oil pressure light showing. E.g. say beteeen 0.3 and 0.5ba by using wrong spec.  

 

Weird, okay. 
 

Since the other two have been replaced, that's the only switch now running the 'incorrect' bar rating.

 

I'll try that as one last 'cheap' fix. If not, to the garage it goes.

Really appreciate your input.

6 minutes ago, vRSRutty said:

 

Following this, asked the guy that replaced it what part he used, he's used a 0.3-0.6 bar switch when it's meant to be 0.55-0.85 bar.

Hopefully this is the problem.  I can look up current part number and price for genuine with the VIN, if useful.

1 minute ago, Breezy_Pete said:

Hopefully this is the problem.  I can look up current part number and price for genuine with the VIN, if useful.

 

I saw another thread where you used LLLParts, so I just piggybacked off that to find the part # I needed! 

 

Thanks anyway

Would be easier to pick right one(s) with VIN. Is the 0.3-0.6 one green?

Just now, Breezy_Pete said:

Would be easier to pick right one(s) with VIN. Is the 0.3-0.6 one green?

 

 

Both the 0.3-0.6 installed and 0.55-0.85 I need, are brown

 

 

4 minutes ago, Breezy_Pete said:

Would be easier to pick right one(s) with VIN. Is the 0.3-0.6 one green?

 

This is the one I think I need 

https://www.lllparts.co.uk/product/038919081K/oil-pressure-switch

 

This one is the one installed currently

https://www.darksidedevelopments.co.uk/products/oil-pressure-switch-for-vag-tfsi-petrol-engines-0-3-0-6-bar.html

 

It's weird because that second one covers loads of part numbers (including the one I need) but it's a different spec.

 

 

Wouldn't want to say which is correct without VIN filtering.

31 minutes ago, vRSRutty said:

 

Weird, okay. 
 

Since the other two have been replaced, that's the only switch now running the 'incorrect' bar rating.

 

I'll try that as one last 'cheap' fix. If not, to the garage it goes.

Really appreciate your input.

Yes. I'd try a genuine one if - when you remove the connector and cycle the ignition and the ecu reports reduced oil pressure sensor - open circuit fault!  

11 minutes ago, Breezy_Pete said:

Wouldn't want to say which is correct without VIN filtering.

 

Shall I DM you? 

8 minutes ago, TheClient said:

Yes. I'd try a genuine one if - when you remove the connector and cycle the ignition and the ecu reports reduced oil pressure sensor - open circuit fault!  

Will give it a go, thanks.

Yep, message me if you don't wish to post it. 👍