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- ATW
- Member Since: 27 Mar 2023
- Location: Metz
- Posts: 2
Live Values on GAP IID - Bank 1 vs Bank 2 and N/A values
I've bought a 2nd hand LR5 after owning an LR4. The car has been used and isn't in perfect mechanical condition but the oil change was done timely. I'm now trying to fix up the minor/major issues.
A DPF Full error came on suddenly. I've watched some great videos, read through forums and now trying to put the dots together for myself using the GAP IID tool.
My engine is a 2017 3l TDV6 190 kW and codes on GAP tool are the common overboost (P0234-77) and P2463-00 Diesel particulate filter pressure sensor B circuit range.
The value is not stuck in a closed position and moves freely.
Looking at the live values through the IID, the soot mass is ~3g and the Particulate filter differential pressure approx 7kPa at 3000 rpm so I don't think the "Red Full DPF , see dealer light" is actually a full DPF. Especially since it came on suddenly with no amber warning prior to suggest a regen.
Following some videos & posts, the oil separator seems to be a reoccurring theme so I have ordered one of those with the seals since it wasn't too expensive (relatively speaking).
I found the MAP sensor and it was predictably filthy and blocked. I've cleaned that and would now like to 'check it'.
Unfortunately, I'm new to the GAP IID tool and I am not sure what all the N/A readings mean. To name a few:
Mass air flow N/A
Mass air flow sensor B
Mass air flow sensor B - Supported
Intake manifold absolute pressure A
Intake manifold absolute pressure A - Supported
Intake manifold absolute pressure B
Intake manifold absolute pressure B - Supported
Diesel particulate filter - Bank 2 - Inlet pressure
Diesel particulate filter - Bank 2 - Inlet pressure - Supported
Diesel particulate filter - Bank 2 - Outlet pressure
Diesel particulate filter - Bank 2 - Outlet pressure - Supported
Intake air temperature sensor - Bank 1 - Sensor 1
Intake air temperature sensor - Bank 1 - Sensor 1 - Supported
Intake air temperature sensor - Bank 1 - Sensor 2
Intake air temperature sensor - Bank 1 - Sensor 2 - Supported
Intake air temperature sensor - Bank 1 - Sensor 3
Intake air temperature sensor - Bank 1 - Sensor 3 - Supported
Intake manifold absolute pressure A
Intake manifold absolute pressure A - Supported
Intake manifold absolute pressure B
Intake manifold absolute pressure B - Supported
Any help interpreting Bank 1 vs Bank 2 and what a N/A value means (does it mean there is no signal or is it just a placeholder for a sensor present on other models etc..). Are N/A values for these sensors on the TDV6 normal.
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- Colind
- Member Since: 21 Jan 2024
- Location: Worcestershire
- Posts: 2
did you resolve the issue? My D5 is gong into reduced performance, but I pull over, turn it off, then back on & away we go again. It almost evernt time i go up a good long hill,.. The iid on live values does MASS aif floe on banks 1 & 2. my 3.0 SDV6 has the MAFT on bank 1 & MAF on bank 2, it reading a value on bank 2, but nothing on back 1 - Is this just a restriction on the iid, or does it indicate my MASF is dead?
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- ATW
- Member Since: 27 Mar 2023
- Location: Metz
- Posts: 2
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You could probe the sensors with a multimeter - there are a few good videos on YouTube explaining how as well as which wire is which; and I think the sensors are fairly standard in their operation across brands/models of cars.
In my case, the sensors were working (air flow and pressure). I couldn't find any leaks using a smoke machine (from AliExpress) so I stumped up for a new throttle body.
It wasn't "sticking" as shown on many videos but it fixed it immediately. If you go down that route, don't forget to do the air flow correlation procedure afterwards (which is not shown in any of the videos which I watched).
I think the throttle body is a very common failure and it doesn't always visibly stick as shown in the videos. This leads a lot of people down the DPF or turbo route unnecessarily.
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- Colind
- Member Since: 21 Jan 2024
- Location: Worcestershire
- Posts: 2
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Thank you, I have git a smoke machine & that was my next step. Ove only used it a few times over the last 4 months due to the issues, but I will look at the throttle body - it is a common issue
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