2014 Volkswagen Touareg P0171 21232 WVGEP9BP8ED007922

Micah Owner/Technician Bainbridge Island, Washington Posted   Latest   Edited  
Discussion
Driveability
2014 Volkswagen Touareg TDI Executive 3.0L (CNRB) 8-spd (0C8)
P0171 - System Too Lean Bank 1
21232

Sets code when driving slow. Another tech had intake off recently. All fuel injectors except #3 were flowing evenly. #3 was adding +90. Smoked intake no leaks. Replaced #3 injector now at -50. Still setting P0171. Fuel pressures are within specs. Egr shows that it's closed. O2 was sooted up replaced. No change other then it takes longer to set light. Customer does not want to take it to the dealer due to emission software flash. I'm hoping somebody can point me in a direction. 

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John Mechanic
Escondido, California
John Default
 

Did you check for an intake leak?

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Eric Owner/Technician
Edgerton, Wisconsin
Eric Default
 

Direction #1, don't drive slow. Direction #2 how about a VIN so we know what we are working on. #3, I prefer actual measurements, not a "within specs" statement #4, What software flash? Do you mean someone has changed the PCM from the factory programming? If so, why are you even working on it? If so, do you know what the programming change does and exactly how it does it? #5, Freeze frame…

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Agree
Micah Owner/Technician
Bainbridge Island, Washington
Micah Default
 

WVGEP9BP8ED007922 No pcm hasn't been changed. Vehicle is under emissions recall Customer does not want it done. I'll get some data logs and post them.

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Richard Technician
Stony Brook, New York
Richard Default
 

I come back with a diesel with that VIN. Is that correct?

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Micah Owner/Technician
Bainbridge Island, Washington
Micah Default
 

Yes 3.0l TDI

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Raymond Mobile Technician
Masonville, New York
Raymond Default
 

What type of scanner are you using, do you have access to a VAG. Do you have a scope?

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Stephen Educator
Bethel, Ohio
Stephen Default
 

Look I don't want to sound harsh here but! Who cares what the customer wants!!! You are about to put yourself in a position where you may be violating the law. Remember, you are tampering with emission control devices. Do be careful as to what and how far you go with this vehicle. At the end of the day the government will come after you not the customer.

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Micah Owner/Technician
Bainbridge Island, Washington
Micah Default
 

Yes I have scope, Vag, Autologic Drive, Snapon & Autell Maxisys

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Benjamin Technician
Berkeley, California
Benjamin Default
 

16555/P… - Fuel Trim; Bank 1: System Too Lean Possible Causes - Mass Air Flow Sensor (G70) defective - Intake System Leak(s) Possible Solutions - Check Mass Air Flow Sensor (G70) - Check Fuel Pressure Regulation - Check Fuel Pump - Check Injectors - Check Intake System for Leaks - Check Exhaust System for Leaks - Check Secondary Air System for Leaks - Check Vacuum…

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