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Discussion Starter #1
I have an insignia a20dth which fails a forces regen.

I'm using GDS2 and it says the diffirential pressure is 40kpa. The soot loading is 225%

There's no DTC's and the EML light is off.

One thing I have noticed is GDS2 is reporting the exhaust gas temperature as 0c but in another menu is showing the voltage as 1.04v increasing to 5.0v when the sensor is unplugged.

Would a replacement exhaust gas sensor sort this out and allow me to regen?
 

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If certain values ain’t matched yes it will fail a regen.
I had a problem on a 1.7 Zafira where it wouldn’t get up to a high enough temp and would allow a partial regen and that’s it.

The voltages are changed into values on temp etc for display, so is got some movement when disconnected. It’s strange no fault if removed, when removed did you run the engine upto temperature and still no reading ?

It’s worth swapping the sensor if not expensive to prove it’s that.
Usually needs a sensor socket to remove them as can be very tight and spanner’s slip easy. Only £6-7 I think but usually an order in item for some places, and with the wire on you can’t get a standard round socket on it unless you cut the wire.
 

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Discussion Starter #3
If certain values ain’t matched yes it will fail a regen.
I had a problem on a 1.7 Zafira where it wouldn’t get up to a high enough temp and would allow a partial regen and that’s it.

The voltages are changed into values on temp etc for display, so is got some movement when disconnected. It’s strange no fault if removed, when removed did you run the engine upto temperature and still no reading ?

It’s worth swapping the sensor if not expensive to prove it’s that.
Usually needs a sensor socket to remove them as can be very tight and spanner’s slip easy. Only £6-7 I think but usually an order in item for some places, and with the wire on you can’t get a standard round socket on it unless you cut the wire.
Thanks for your reply.

I thought it was odd I removed it whilst the engine was hot and got no DTC's.

I know it needs to meet certain criteria to do the regen I'm just not sure if there's a bug somewhere. It just seems weird that the sensor is changing the voltage yet it's still reading 0c. It's equally as weird that with the sensor unplugged the car is totally happy.
 

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Is this the motor where there's a query as to whether the ECU has had the DPF software delete & DPF removed ?
 

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Only question would be is the sensor voltage changing enough ?
If I remember right it should be late 300-400’
What’s the other sensors on exhaust reading ?
My zafira has 3, but my 1 year out of date opcom would only pick up two of the sensors and list them incorrectly also.

Check out the price of sensor and if cheap enough try it?

Could be worth finding another diagnostic computer?
Have a chat with a dpf specialist like one of the dpf doctor franchise garages??
 

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Is this the motor where there's a query as to whether the ECU has had the DPF software delete & DPF removed ?
as far as i can see It is Fred,probably worth locking one of the threads before it gets too confusing,
i was just about to reply on the other one,but i'll hold off
 
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Discussion Starter #8
Only question would be is the sensor voltage changing enough ?
If I remember right it should be late 300-400’
What’s the other sensors on exhaust reading ?
My zafira has 3, but my 1 year out of date opcom would only pick up two of the sensors and list them incorrectly also.

Check out the price of sensor and if cheap enough try it?

Could be worth finding another diagnostic computer?
Have a chat with a dpf specialist like one of the dpf doctor franchise garages??
To the best of my knowledge there's only one temperature sensor and there's one lambda sensor. I have actually replaced the front Flexi so have seen there's no other temperature sensors. Also GDS2 only lists the temperature for one.

It's all a bit odd.
 

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It sounds as though you have a 5v feed in place and working to the temp sensor,
Try measuring the sensor resistance
@ ambient temp you should see about 200> 210 ohms,
@100c about 280 ohms and increasing as the temp rises,
it tops out @ 850ohms @ 1000c !
 

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Discussion Starter #11
It sounds as though you have a 5v feed in place and working to the temp sensor,
Try measuring the sensor resistance
@ ambient temp you should see about 200> 210 ohms,
@100c about 280 ohms and increasing as the temp rises,
it tops out @ 850ohms @ 1000c !
Thanks for that.

I taken the sensor out and tested it, it read 211ohms at ambient and increased with heat and decreased as it cooled so all looks well.

Do you know which pins it goes back to in the ECU plug? I think the next thing to do is check for any breaks in the wiring.
 

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I would take it for a longer run and see if it will regen, you can monitor the temp sensor while driving, if it get over 500 C then its regenerating, if the temp stays low or at 0 then the sensor is faulty,.. the high pressure at idle is why it wont static regen.
 

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Do you have top consumers option on clocks.
If you do, watch that, if rear demist comes on even though it's not on at the button it's doing a re-gen.
 

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Does your tick over rate ever increase whilst driving? If so, that's a sign your car is trying or having a regen.
 

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Do you have top consumers option on clocks.
If you do, watch that, if rear demist comes on even though it's not on at the button it's doing a re-gen.
Or fit your own led 12v regen indication light, as a lot of insignia drivers have also done. My self included with my J with the same engine. Take a feed from the rear demister circuit.
 

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You never know when our Mini Countryman is doing a regeneration & we never noticed our Corsa D ever doing one.
According to BMW the regeneration should take place behind the scenes & be seamless , so far that’s been the case.
 
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