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Dpf light on vw Passat cayc 1.6tdi
16-07-2025, 21:11 PM,
Post: #1
Dpf light on vw Passat cayc 1.6tdi
Hi mates.I have a big problem with this car.At the past we did dpf off to this car without any problems.Car went to another shop and did an update.03l906023fs 9978 was previous and eent to 9979.Now car has dpf light on without any dtc codes but i can not reset it with vcds I put 0 in filter initialisation but lamp is on.Vcds has another option which says blocking particle filter.Maybe there is a trick for this? Tried to put dpf off file but also lamp is still on.Any advice please?
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16-07-2025, 21:25 PM,
Post: #2
RE: Dpf light on vw Passat cayc 1.6tdi
if you still have ori file before update, post both the ori and new updated file
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[+] 1 user says Thank You to al70 for this post
16-07-2025, 21:33 PM,
Post: #3
RE: Dpf light on vw Passat cayc 1.6tdi
(16-07-2025, 21:25 PM)al70 Wrote:  if you still have ori file before update, post both the ori and new updated file

I have only the mod file dpf egr off from previous sw.it is ok to upload?or must bee the original version?
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16-07-2025, 21:55 PM,
Post: #4
RE: Dpf light on vw Passat cayc 1.6tdi
post the new updated file
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17-07-2025, 05:34 AM,
Post: #5
RE: Dpf light on vw Passat cayc 1.6tdi
here it is 03l906023fs 9979


Attached Files
new software.rar
File Type: .rar
Downloaded: 5 times
Size: 102.83 KB

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17-07-2025, 08:16 AM,
Post: #6
RE: Dpf light on vw Passat cayc 1.6tdi
On PCR2.1 sometimes VCDS writes data about the new DPF incorrectly. Sometimes the DPF light goes out only after performing an emergency regeneration of the DPF filter. Try to focus on the LIVE values that say about the DPF. Did VCDS clear the oil cache or grams. Maybe it didn't clear one of them. If so, try performing an emergency regeneration. Was the DPF turned off in the 9978 software?
Reputation: +1 - al70 [+1]
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[+] 1 user says Thank You to DavidForgac for this post
17-07-2025, 13:10 PM,
Post: #7
RE: Dpf light on vw Passat cayc 1.6tdi
(17-07-2025, 08:16 AM)DavidForgac Wrote:  On PCR2.1 sometimes VCDS writes data about the new DPF incorrectly. Sometimes the DPF light goes out only after performing an emergency regeneration of the DPF filter. Try to focus on the LIVE values that say about the DPF. Did VCDS clear the oil cache or grams. Maybe it didn't clear one of them. If so, try performing an emergency regeneration. Was the DPF turned off in the 9978 software?

yes was off with 9978
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17-07-2025, 18:20 PM,
Post: #8
RE: Dpf light on vw Passat cayc 1.6tdi
I have checked everything for dpf and all values are 0 but lamp is still on unbelievable
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17-07-2025, 18:50 PM,
Post: #9
RE: Dpf light on vw Passat cayc 1.6tdi
any fault codes in the cluster ?
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17-07-2025, 19:50 PM,
Post: #10
RE: Dpf light on vw Passat cayc 1.6tdi
(17-07-2025, 18:50 PM)al70 Wrote:  any fault codes in the cluster ?

No nothing.The only dtc is from ecu with soot accumulation but i have erased ot after adaptation for dpf .
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