AUDI A4 B7 3.0TDI DPF

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MARTYNOCARABASO

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Ignore overboost code as its not happening. 3gear full thro
 
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MARTYNOCARABASO

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uwe, thanks. so update on the issue. sensor was aftermarket one, so someone been there already. i put new sensor, adaption process (once the differential sensor g450 has been replaced its offset value has be reset. to initiate the zero compensation save "0001" as new value. once the new value has been saved and the zero compensation has been initiated cycle the ignition off and wait 10seconds before switching it back on. the new offset value can be checked in measuring block mvb 102).
so i enter 0001 and hit test and safe. nothing happening waiting waiting nothing. started the car and looking at mvb 102. carbon mass actual droping in 0.5 steps from 16 to 0.0. soon after fault code come for 008194 - Particulate Trap Bank 1 P2002 - 001 - Efficiency Below Threshold - MIL ON. so i jump in the motorway 20miles in 4gear 60miles/h. same glow plug light keeps flashing, limp mode same code comes back as soon as fault deleted. fault codes 009300 - Diesel Particle Filter; Differential Pressure Sensor P2454 - 001 - Short to GND- Intermittent and 013128 - Control Circuit for Controller for Turbocharger 1 (J724) P3348 - 009 - Electrical Malfunction - Intermittent was deleted before jurney and did not come back.
 
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MARTYNOCARABASO

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please tell what means "the zero compensation has been initiated" ?
also why carbon mass actual dropped to 0.0 but getting limp mode and fault code 008194 - Particulate Trap Bank 1 P2002 - 001 - Efficiency Below Threshold - MIL ON?
what i did wrong?
 
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MARTYNOCARABASO

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"Is the DPF actually plugged or signal line to PSI sensors?" what you mean?
with shity sensor, i had actual reading close to the claculated one. with new original sensor reading dropped to ZERO. i believe it's something to do with sensor adaptation.
 
   #27  

Uwe

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Have you looked at MVB 102, fields 3 and 4 to see what the actual readings from that sensor are?
Check them with key on, engine not running; with the engine at idle; and with a substantial load on the engine.

-Uwe-
 
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Ignition On
102 field 3 (0mbar) field 4 (0mbar)
104 carbon mass calculated 17 actual 15

IDLE
102 field 3 (0mbar) field 4 (0mbar)
104 carbon mass calculated 17 actual 15 but slowly drops to ZERO

RPM 2268
102 field 3 (-29mbar) field 4 (0mbar)

So I restart ignition to have carbon mass 15 and forced regen. Its started but after 10mins stoped, checked the fault code and its Control Circuit for Controller for Turbocharger 1 (J724) P3348 - 009 - Electrical Malfunction - Intermittent. So deleted the fault, restart ignition and forced regen again. Again its stoped in few minutes with permanent Control Circuit for Controller for Turbocharger 1 (J724) P3348 - 009 - Electrical Malfunction. Wtf is going on?
 
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Uwe

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Am I reading the above correctly: The value is negative at 2268 RPM?

I also don't think 0 mbar at idle is plausible.

IMO, something is not right with that sensor, or the plumbing between it and the exhaust system.

-Uwe-
 
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PetrolDave

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Am I reading the above correctly: The value is negative at 2268 RPM?

I also don't think 0 mbar at idle is plausible.

IMO, something is not right with that sensor, or the plumbing between it and the exhaust system.

-Uwe-
+1

On other forums I have read cases where owners have replaced the sensor only to find the strange readings still happened, on further investigation the pipe(s) to the sensor were blocked by a berm of smoke particles - so check the pipes first.
 
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UPDATE:
So today I find out that two lines was switched around by previous owner who also fitted cheap sensor. I put the tubes correct way, readapt sensor checked 102 and 104. Alll well, got positive pressure on idle 7mbar, and higher then boosting. Done test drive, regen done itself while driving as miles since last gen droped to ZERO, put good fuel drive back nice and boosting from time to time. All good. No fault codes or lights in the dash. Great yeah!?!? NO
Parked the car for 10minutes, stsrt driving again glow plug light come back and limp mode too. Checked the faults and its fault for turbo again.
 
   #32  

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013128 - Control Circuit for Controller for Turbocharger 1 (J724)
P3348 - 009 - Electrical Malfunction - Intermittent
Freeze Frame:
Fault Status: 00101001
Fault Priority: 0
Fault Frequency: 2
Reset counter: 255
Mileage: 167164 km
Time Indication: 0

Freeze Frame:
RPM: 882 /min
Torque: 23.4 Nm
Speed: 0.0 km/h
Temperature: 82.8°C
Duty Cycle: 60.8 %
Voltage: 11.86 V
Duty Cycle: 0.4 %
 
   #33  

Jack@European_Parts

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Like I said the boost situation must be corrected first & even to linearize the turbo at idle, to do a regen or perform an adaption related to a PSI/DPF sensor!

Correcting your induced FOD is also a good start, next time use color tape or paint identifiers on hose routing!

eTu9lha.png
 
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what is FOD? could boost leak couse the fault code? as one intercooler looks oily so maybe cracked. also turbo pressure spec vs actual, actual often lower in strong boost situations. not mush but lower, could post log but dunno how. also wondering why voltage is so low everytime fault recorded? and speed not shown in freeze frame data
 
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MARTYNOCARABASO

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so to summarize my questions are:
1. what is FOD? (Correcting your induced FOD is also a good start)
2. could boost leak cause the code?
3. how to post recorded log? so you could look in VCScope
4.why voltage low and speed not showing in freeze frame?
5. do forced regen required if it has done itself while driving?
also want to thank you lads for trying to help me. big kiss for all you
 
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If you're on a PC (or Mac) anything on this forum that is bold underlined green (like FOD) will show a pop-up explanation if you hover your mouse over it.

FOD basically means either physical damage or fitting an incorrect part (either hardware or software such as a chip tune).
 
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Ok, so turbo fault code must berelated to actuator or wiring. Today started the car, no faulr codes. Driving fon an hour no fault codes. Parked for 15min come back fault already there. So its must be heat related issue. How could I test actuator? Or wiring for issues?
 
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Jack@European_Parts

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Ok, so turbo fault code must berelated to actuator or wiring. Today started the car, no faulr codes. Driving fon an hour no fault codes. Parked for 15min come back fault already there. So its must be heat related issue. How could I test actuator? Or wiring for issues?

Here is how>>>>> RTFB & root out FOD and test components or wiring + verify part numbers.



 
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I will try to do load line test or voltage drop test. Just wondering if wires bad is it I should have implausible signal first?
Seems to be actuator is common issue on these turbos too. Last night after parked for 15mins actuator was making some noise like gears trying to spin. Removed connector and reconnected, it moved up and down as self test but noise in actuator was still ongoing. Makes me think is actuator.
 
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