Flashing coil light start/stop error P164B

[Jwhit]

So further update. Van still with VW. Oil regulator keeps faulting. They have checked everything and changed it but keeps having a fault. VW have contacted technical support for advice ….

 

[NickyBrown08]

What fault is coming up on the reeder? What model is your?

 

[Jwhit]

What fault is coming up on the reeder? What model is your?

2017 150 highline. Not sure what the code is ‍

 

[NickyBrown08]

Have you checked for a blocked DPF?

 

[Jwhit]

I would assume VW would maybe think of this? Hopefully. Local garage said nothing indicated dpf and VW droitwich have it now

 

[NickyBrown08]

I took mine to 4 garages before someone spotted the problem and one of them was a VW specialist.
If it’s not regenerating properly and the build up isn’t getting burned away the exhaust gasses have nowhere to go and come back in to engine.
Do you drive yours as a daily driver?

 

[Jwhit]

Yes it does still regen. Also put premium fuel in and gave it a run up motorway etc. but yeah it’s a short trip daily

 

[NickyBrown08]

Personally would be looking at the DPF if you are still getting problems. They are a massive ball ache.
Hope you get it sorted.

 

[Jwhit]

Yes, it does seem like a phantom fault, loads of people reporting it and i dont see anyone getting it conclusively fixed. VW specialist now saying need to get sump off and something with the oil pump. I was warned about how unreliable T6s are, learnt my lesson the hard way

Just had the oil pump changed by VW as tech services thought it was that. No change …. Wtaf

 

[mossmotorsport]

I now have the same fault, any updates on this thread for anyone else experiencing issues?

 

[JustWilf]

It happened to mine not too long ago. Took to Volkscraft in Exeter and after plenty time diagnosing it was the Oil pressure sensor which they changed over and not had any issues since.
I think with the flashing coil light it could be quite a number of different things wrong unfortunately rather than a single cause.

 

[george_holland]

Replied to this a number of times and various attempts to fix it.

1. High and low pressure switches replaced twice, fault recurred after a few months

2. Oil pressure regulation valve replaced, fault recurred after a couple of months

3. Oil pump replaced, now done 6k miles and 5 months later the fault has not returned

The pump was worn on dismantling but still surprising this was the cause but seems to have fixed the problem. Will report back in another 5 months. Here's hoping that's done it as it has been costly

 

[NickyBrown08]

I now have the same fault, any updates on this thread for anyone else experiencing issues?

Hi pal, have you had the van long?

Mine was DPF which was blocked. I use mine as a daily so not getting long trips in enough.

Nicky

 

[JoshO]

Hi pal, have you had the van long?

Mine was DPF which was blocked. I use mine as a daily so not getting long trips in enough.

Nicky

Sorry for reigniting this thread so far down the line, what solution did you use for the blocked dpf?

 

[JoshO]

Varied. Bought Carista and forced DPF regeneration, soot level got down low but wasn't that high to start with. That hasn't fixed it, coil light back on. Same fault code for oil pressure switch. Very frustrating

Did you need pro to do that or was standard app enough?

 

[GeordieStu]

On route to drop off my 2017 T6 (T32) to fit lower springs, Coil warning light flashed up. Reading this thread looks like it's going to be another costly repair, already had to replace the Haldex unit. Waiting for the garage to give me the bad news...!

 

[ryan944]

On route to drop off my 2017 T6 (T32) to fit lower springs, Coil warning light flashed up. Reading this thread looks like it's going to be another costly repair, already had to replace the Haldex unit. Waiting for the garage to give me the bad news...!

The P164b00 fault can be many things - if your lucky its the green sensor - but hard to change ! then its the regulating valve ! IF no joy then clean sump and replace oil pump.
Clean DPF would be you next move. I Still had the fault after all this - my 2017 CXEB SPortline is drinking oil - but no smoke - reading through this forum the CXEB twin turbo is
only designed to last 100k - then its a new block hence the VW upgrade on the 2018 versions. I used a thicker oil and have now moved this load of shite on and have gone back to a transit - Happy DAys.!!!!

 

[KluthR]

Hi pal, have you had the van long?

Mine was DPF which was blocked. I use mine as a daily so not getting long trips in enough.

Nicky

Hi. Iam unsure: How does an blocked DPF can affect oil pressure and trigger an switch fault?

 

[ryan944]

The p164b00 fault is saying the oil pressure is lower than the ecu requires at that time. There appear to be many reasons
That can cause this fault. After spending loads never fully identified the root cause. Had messages from other members
That the dpf can cause this along with egr and turbo etc. Having seen photos and videos of a CXEB twin turbo engine taken apart after 90k is very concerning and as mine was drinking oil can assume and only assume a new block was required. The change to a thicker oil is the cheapest way out.
Search dark side developments on YouTube. Changing the green low pressure sensor which will cost approx £300 only rectifies a very small percentage of the p164b00 fault. My advice would be if you own a CXEB 204 dsg version and drinks oil along with the dreaded vw p164b00 fault get shot of it.