D 13 Egr mass flow fault

I have a 2009 volvo with d 13 I have an issue with a code that keeps coming up . The code is ppid 35. I have tried everything from changing egr to 3 different delta p sensors also new egr cooler and venturi tube new catalyst in the back. But I'm still getting same code. When truck is hooked up to vcads and you're in the egr testing screen the egr open and closed and I get a changing egr mass flow as well the only problem is that the value for the delta p sensor does not change no matter what it's always constant and the same stuck at.82. Originally though it was wiring checked all delta p wiring everything checks out perfect even ran new signal wire from exam to delta p and still same issue. I'm thing that the exam is cooked but don't want to jump right anything if anyone has had this type of problem you're help is very much appreciated.

 

ECM SPN 2659, Engine Exhaust Gas Recirculation (EGR) Mass Flow Rate
– MID 128 PPID 35
Type of
fault:
FMI Description: Fault Condition: Possible
Symptoms:
Possible Cause:
FMI 0
(J1587
only)
• Data valid but above
normal operational
range
• EGR flow is too
high
• MIL illuminated
• Exhaust smoke
• Faulty EGR system
FMI 1 • Data valid but below
normal operational
range
• EGR flow is too
low
• MIL illuminated • Faulty EGR system
• Clogged EGR cooler

 

Hey guys anybody now about this code p20d713 I already change the aftertreatment ahi dousing module and 7th injector anyone now about this code please help I am fighting with this code

 

Make sure you replace the air dryer filter since you replaced your ahi module. #1 failure of ahi module is a past due air dryer filter. Did you perform a regen following component replacements? Will need dealer to run manual regen. If nothing wrong with connections and AHI fuel pressure sensor circuit then all that is left is the ECU.

 

ECU issue

 

Naz,i know this post is old.Do you remember what was causing this ?I have the same issue,replaced Delta P, replaced egr temp sensor,Replaced venturi pipe and the short harness (updated venturi ) also replaced catalyst doc.outlet side of egr cooler looks clean not clogged.Any advise what els i should look for?The engine is louder. Sounds like horse running,as if its not running even.

 

This ended up being wiring harness once I replaced wiring harness for engine code went away everything came back to normal.