Did you use OEM parts?
Besides the generic OBD code P164B, do you have also the VW specific code (see post #2)?
I'm afraid the way forward would be:
[T6_measured] 01-Engine - Oil pressure switches & Oil level sensor
- Thread starter mmi
- Start date
Besides the generic OBD code P164B, do you have also the VW specific code (see post #2)?
I'm afraid the way forward would be:
rstaunton18804
Member
I have exactly the same van and same issue..... T6 150 2016 (66) Hope some T6 guru out there can give us some hope.
The answers are in this thread pretty much, if you still have an issue after replacing the parts then some additional data logging need to be performed to see whats still going on.
rstaunton18804
Member
I'm just a little confused why my garage has suggested I need an engine recon before they have replaced the oil pressure valve. They have said the oil pressure gauge used when they dropped the sump suggested that there is an 'internal loss of oil pressure'. Does a decision not to replace the valve make sense in light of that information or are they just not sure what they are doing?
Well it would depend on what tests they have done and what codes were showing if they scanned it. If they have done an oil pressure check with a gauge and done some tests then that would suggest its an oil pump issue not a regulator issue. An oil pressure issue can lead to an engine replaced.
rstaunton18804
Member
These are the full notes provided. P164B
Well as seen as there is a high, low and a regulator and they have only replaced the high, i would firstly find another garage as it sounds like they dont know vw’s that well and then for the sake of £100 in parts plus your labour i would replace the regulator first and then see how you go!
rstaunton18804
Member
Thanks very much Sam. Just been to the vw specialist who recommend exactly as you suggest and will do it for us next Tuesday. Why the garage decides to share the life out of me with the recon suggestion before doing this I just do not know.
Yeah thats alot better! I would have always investigated oil pump first as well before saying oh yeah its your engine thats gone. If the bearings had gone it would make an awful noise!!
rstaunton18804
Member
Had a journey I needed to make yesterday and I now have an additional oil inspection symbol on startup. Seems a strange coincidence and it makes me more concerned about whether it’s safe to drive to the garage. Could this be a coincidence and it’s just happens to be due an oil inspection? Should the garage who did an oil and filter change last week have reset the clock in this thought? Help appreciated
Garage hasnt reset the oil inspection light, nowt to worry about.
rstaunton18804
Member
Oil pressure regulator valve replacement has solved my issue. Massive thanks to this forum for help and advice.
Time to have a chat with the garage that told me I need a new engine I think..
Time to have a chat with the garage that told me I need a new engine I think..
Edited post #1 to include a chapter of engine's build-in Test of changeover of oil pressure valve - executed by using VCDS diagnostic tool.
I believe this test should/could be the first diagnostic measure when any of the mentioned fault codes appear. Actually besides testing the oil pressure valve also states of both low and high oil pressure switches will be seen.
I believe this test should/could be the first diagnostic measure when any of the mentioned fault codes appear. Actually besides testing the oil pressure valve also states of both low and high oil pressure switches will be seen.
Please report back - especially if/when the test reports something else than shown below.
Hi guys, so I have just bought a T6 2017 102 Blue motion 5 speed manual model with 80k miles on it, from a private seller. Sneaky sneaky people in Watchet Somerset!!! warmed van prior to me viewing and said nothing about their recurring fault upon a cold start!! Awful way to do business....
Anyways, following morning after a hotel stop over, we decided to head home 4 hr journey. Set off and you guessed it, cold engine, flashing coil light. Had my topdon diag tool on me, up it comes, P164B00, oil pressure switch malfunction. Incredibly, ran selller and they knew nothing of this fault ¯\_(ツ)_/¯ and said on your way not our problem!! I can assure them it will be their problem if this is genuinely a bigger issue than after reading this thread. ( thanks so much to contributers here ).
So I've established it comes in every cold start within a mile of driving, which suggests to me the valve is corroded and sticky possibly. So have ordered the relevant parts from the VW local dealer.
Question, am I likely to solve it just changing the valve based on others experience here or change everything? both sensors and valve? based off my fault code. It only does it cold, once reset it doesn't come back in all day if engine is warmish.
Any help on location for the two sensors and the valve? photograph / explanation above doesn't make any sense hidden under alternator? I cant see alt in that pic?? unless I'm blind?
Hey folks
An update on my oil pressure switch issues etc!
So I’m a year on now with this issue (p164b flashing coil light when cold , loss of power)
After 4 different garages including VW main stealer, all the oil pressure switches and regulator being changed twice, the problem still kept coming back after a couple of months.
I’ve just been to another independent guy who flushed the oil, cleaned out the sump, the oil pick up and replaced the high and low oil pressure switches again.
The pick up was full of crud, I’m hoping this was the issue as no one had done this.
A month on it’s still all good, I think over the last year, the longest the fault had stayed off was 3 months, so I’ll update again in another couple of months!!
Hope this helps someone!
T6 150 66 plate
An update on my oil pressure switch issues etc!
So I’m a year on now with this issue (p164b flashing coil light when cold , loss of power)
After 4 different garages including VW main stealer, all the oil pressure switches and regulator being changed twice, the problem still kept coming back after a couple of months.
I’ve just been to another independent guy who flushed the oil, cleaned out the sump, the oil pick up and replaced the high and low oil pressure switches again.
The pick up was full of crud, I’m hoping this was the issue as no one had done this.
A month on it’s still all good, I think over the last year, the longest the fault had stayed off was 3 months, so I’ll update again in another couple of months!!
Hope this helps someone!
T6 150 66 plate
Also, quick one, what state should the high pressure switch be in when engine is running? open or closed? can anyone confirm?
Here are screen shots of mine both running and ignition off:
The engine running I have low pressure switch closed and high pressure switch open.
Engine off I have both switches open. Can anyone confirm same?
Here are screen shots of mine both running and ignition off:
The engine running I have low pressure switch closed and high pressure switch open.
Engine off I have both switches open. Can anyone confirm same?
How about this link (post#23)
[T6_measured] 01-Engine - Oil pressure switches & Oil level sensor
I've searched for 04l906455j and its pulling back results for 04L906455A, would this be ok? Unfortunately I can't confirm their interchangeability. However, some sellers indeed mention both part numbers, e.g. https://www.oemvwshop.com/04l906455j-operating-valve-for-oil-pump-p236940/
Yes, correct. However, you should check their response to the oil pump PWM signal duty cycle - e.g. picture 4 in post#1 - by quickly flooring the throttle you should get a momentary high pressure switch closed.
So, I changed the oil switch on the filter housing along with a new oil pressure regulating valve from local vw dealership, and good news, fault has gone.
Interesting to see, the new regulating valve is a different design altogether, to note,
sealing o ring weirdly is in a different place, with less ports than previous.
All good though! referring to original photo I sent of location, that is not it. The reg valve is underneath, pull front engine mount out of the way, its there, bit of a pig to get to, but done in 2 hours ish after finding correct tools.
t30 is what holds screw in for the valve itself.
Bit of a hassle to get to it, but all done now. And looks like its solved my flashing coil light. New part is vastly different in size, ports and sealing o ring location ( see photos ) bizarre!! but sorted
Interesting to see, the new regulating valve is a different design altogether, to note,
sealing o ring weirdly is in a different place, with less ports than previous.All good though! referring to original photo I sent of location, that is not it. The reg valve is underneath, pull front engine mount out of the way, its there, bit of a pig to get to, but done in 2 hours ish after finding correct tools.
t30 is what holds screw in for the valve itself.
Bit of a hassle to get to it, but all done now. And looks like its solved my flashing coil light. New part is vastly different in size, ports and sealing o ring location ( see photos ) bizarre!! but sorted
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