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> Dpf Sensor Or Filter?, 2011 1.6D DPF issue - narrowed down but need input please
post Mar 4 2021, 05:43 PM
Post #1


Group: Members
Posts: 2
Joined: 4-March 21
Member No.: 252,473
Status: Offline
Location: UK
Drives: Volvo V50 1.6 DRIVe D4164T 2011

2011 V50 1.6 DRIVe D4164T

This car is new to one daughter. I went with her to check it over and negotiate around 2 months ago. The abridged version is that it had an empty Eolys tank and some other issues e.g.glow plugs which I sorted out and cleared all DTCS with Vida Dice. I reprimed and reset the additive tank and ran a manual regen which failed to complete, and showed a Particulate Trap - Faulty Signal error. It subsequently went into limp mode which cleared on the next start cycle. This continued for a week or so before I got the car back to look at again.

After clearing the code again, it changed to Particulate Trap - Blocked and consequently would not run the forced regen. I suspected the DPF sensor although it appeared to be functioning correctly albeit somewhat high. I replaced it with an aftermarket one which the car didn't much like (see chart below) and subsequently replaced that one with another "OEM" one which behaved identically (I don't believe it is in fact OEM).

I've checked voltages and pressures and listed them on this pic below:

Attached File  11E238E0_9627_4F26_91BF_004DC79E7174.jpeg ( 97.03K ) Number of downloads: 1

Typical signal sensor voltages apparently should be :
Key on engine off 0.5v plausibility voltage.
Idle 1-2v
Full acceleration 1-2v
Readings getting above 2v are now detecting soot accumulation

So by all accounts, the existing sensor seems reasonable, and does appear to work consistently when monitoring in Vida. The flow from the 8mm hose into the sensor feels reasonably good but I don't have a vacuum gauge to check it. I can't speak for the 6mm return hose though. To my mind, it's all pointing to the DPF itself.

Opinions would be much appreciated. Thanks.
Attached File(s)
Attached File  B027B3A1_84BA_4C7E_A775_316C4063BB13.jpeg ( 97.03K ) Number of downloads: 0
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