Oil pressure regulation valve.

[Odhrán mc nally]

Hi,

Looking to see if anyone can help. I have a 2019 leon cupra 300st 4drive , other than the typical water pump/thermostat housing issue the car has never given any trouble. The car has been behaving normally under all driving conditions however during a recent service I noticed the car had thrown a fault code despite not presenting with any light son the dash ! The code was a Engine Electronics P164E00 code, saying there was an electrical error with the oil pressure regulation valve.

I did a bit of further investigation and the connection looked clean for this valve and no visible corrosion. I tried to clear the code but it wouldn't. The car drove fine for a few weeks after servicing then under load one day on the motorway there was a slight stutter over 3500rpm , I have since had this happen multiple times under load. I pulled spark plugs and checked coil packs, all seem fine. However the same code remained. I decided to change the part as this is the only fault the car is throwing and replaced with a genuine VAG oil pressure regulation valve from seat themselves. Following changing this part I attempted to clear code but it still said there was an open circuit and code wouldn't clear. I've since driven the car again and under load I am still getting the same stutter from the engine.

Has anyone experienced this or can offer any further advice before I drop the car into a vag specialist as this is killing the drive of an otherwise fantastic all round car ! I should note the car is completely stock and unmapped.
Thanks in advance

 

[serdar_18fr]

Following changing this part I attempted to clear code but it still said there was an open circuit and code wouldn't clear.

Valve might not be getting required voltage due to a problem in the wiring. Start the engine, remove the connector from the valve and try to measure if it receives electricity.

 

[Odhrán mc nally]

Valve might not be getting required voltage due to a problem in the wiring. Start the engine, remove the connector from the valve and try to measure if it receives electricity.

Hey
Thanks for the reply man !
I'll give that a try and see how it is !
I've noticed one of the sensors above the replaced valve also has a bit of oil on it so I might just clean both of those aswell in case they've been contaminated !
Cheers !

 

[SuperV8]

For that fault code:

1: check the solenoid supply voltage (pin 2)
Turn the ignition on. Measure the voltage on pin 2. Is it between 12 and 14.4 V?
Yes = pass.
No = Turn the ignition on. Measure the voltage on pin 2 (O7 Fuse SB4). Is it between 12 and 14.4 V?
No = check fuse
Yes = Measure the resistance between pins 2 and 2 (O7 Fuse SB4). The resistance should be less than 1 ohm. Check all wires; renew if necessary. See the diagram below for details on wire colours/codes, connectors, welds and locations (if applicable).

2: check solenoid operation.
You have a new valve so can probabbly skip this step!

3: check connectivity of pin 1.
Measure the resistance between pins 1 and B 17 (E1 Engine control unit). Is it less than 1 Ω?
Yes = pass
No = Repair the wiring. See the diagram below for details on wire colours/codes, connectors, welds, shields and locations (if applicable).

 

[Odhrán mc nally]

Hey thank you very much for the quick reply man, I will try this tomorrow and see how I go.