Help please Flashing coil light and EML on. Multiple codes 31391 27202 8208 8216 8217 8338

[Westcoast888]

3) Possibly clogged manifold pressure sensor (G31)​

Captured in fault code freeze frame

In blockmap data

Should be close to ambient pressure - especially when engine off.

This sensor has been replaced with OE item.

 

[Westcoast888]

Internet back in the garage! Will hopefully be able to get back at it over the next few days

 

[Westcoast888]

Based on the blockmap data we actually might have more issues - interestingly not manifested themselves as fault codes - yet.

1) Wiring problem by barometric pressure sensor (G71)​

because we get this
IDE07735 Air filter outlet: pressure sensor 1 bank 1: uncnd. voltage 4.999 V
Some related experiments and explanations here

Fault code P011100

Can anyone shed any light please on this error code P011100 Air intake temperature sensor1? (2017 2.0 CXGB) I have reset the management light and it stays off for 3-5 days then its back on again. When the eml is on it still drives absolutely fine with no noticeable difference at all. I have...

www.t6forum.com

Then the next in the queue...​

2) Wiring problem by Exhaust temperature sensor 1 - before turbo charger​

View attachment 259425
Plain wrong - reads out at max negative which suggests open circuit

Interestingly this didn't manifest itself yet but will probably interfere/inhibit DPF regeneration - which has been already initiated.
View attachment 259426

3) Possibly clogged manifold pressure sensor (G31)​

Captured in fault code freeze frame
View attachment 259421

In blockmap data
View attachment 259422
Should be close to ambient pressure - especially when engine off.

More details

Fault code 30251 & 27202 [Resolved]

Hi, I'm having an issue with my van, the EML is on and glow plug light is flashing and i have 2 faults. I removed the boost pressure sensor and it was clogged with soot, I cleaned it but that didn't have any effect so I have one coming on tuesday, but the 2nd fault with the "open circuit message...

www.t6forum.com

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I've started to wonder if the fault "Sensor reference voltage" is actually a consequence of the open circuits...

Hi MMI

I’m currently sat in the workshop working my way through the points you have raised above. I’m looking at the wiring diagram and it seems that sensors G31 & G 235 are both connected to the earth points 486 & 487 which translates to earth point 4&5 in the engine pre wiring harness. I’m wondering exactly where I can find these.

I’ve done a continuity test from pin 1 on G71 plug to the battery and all is well.
I’m just about to check continuity between pins 3&4 on G71 back to the ECU

 

[Westcoast888]

Ok so there is no continuity between pin 1 of G31 and the battery NEG terminal
Trying to trace wiring but it’s maybe looking like a radiator pack out job?
Gonna drop the under tray to see if I can spot anything from below

 

[Westcoast888]

Ok so there is no continuity between pin 1 of G31 and the battery NEG terminal
Trying to trace wiring but it’s maybe looking like a radiator pack out job?
Gonna drop the under tray to see if I can spot anything from below

There is however continuity through to pin 6 on connector 60 on the ECU which according to the wiring diagram is connected to earthing point 486. Should this also show connection to the bodywork/ battery neg?

 

[Westcoast888]

Continuity proved
Pin 3 G31 to pin 51 T60 ECU
Pin 4 G31 to pin 39 T60 ECU

 

[Westcoast888]

So testing between pin 1 G31 and pin 1 G81 reveals continuity so it kinda proves earth point 486 & 487 are connected together somewhere..

My van is manual trans so * applies to the wiring diagram I think..

 

[Westcoast888]

For clarity when I state continuity I mean I’ve tested with a multi meter and the reading is very low ohm (approx 0 - 0.1 ohm) so basically I think a good electrical path.

 

[Westcoast888]

Continuity proved
Pin 3 G71 to pin 37 T94 ECU
Pin 4 G71 to pin 17 T94 ECU
Pin 1 G71 to pin 15 T94 ECU

Also cross checked to pin 1 on the radiator temp sensor G83 to Pin 1 of G71 and continuity there too.

 

[Westcoast888]

Something else that might help…
When I start the van, it idles high. Approx 1200rpm. Guessing it’s related to the open circuit fault code but thought I’d mention it just in case