http://ebahn.bentleypublishers.com/AUDI/ ....just put in what car you have and it gives you all the fault codes and what possible parts could be causing this code...you get more info if you buy a subscription, but this gives you a good start

 

also, i was wondering if anyone knows the difference between the 2 codes P0172 and P0175 both give the same description but the P0175 says Bank 2 instead of Bank 1...

P0172 16556 System Too Rich Bank 1


Fuel Injectors

Fuel injection system components removing and installing [GST]
Fuel injection volume, fuel injector leakage and spray pattern of injectors, checking
Fuel injectors checking [GST]
Fuel injectors, checking
Fuel rail with fuel injectors, disassembing and assembling

Fuel Supply system

Fuel pressure regulator and residual fuel pressure, checking
Fuel pressure regulator and residual pressure checking [GST]
Fuel Pump (FP) relay -J17- and relay activation, checking
Fuel pump checking [GST]
Fuel pump removing and installing [GST]
Fuel rail with fuel injectors, disassembing and assembling

N80 - Evaporative Emission (EVAP) canister purge regulator valve

Evaporative Emission (EVAP) canister purge regulator valve checking

Oxygen sensors

Function of oxygen sensor control
Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Conv (TWC) checking [GST]
Oxygen sensor and oxygen sensor control before Three Way Catalytic Converter (TWC), checking
Oxygen sensor and oxygen sensor control behind catalytic converter, checking
Oxygen Sensor and oxygen sensor control behind Three Way Catalytic Conv (TWC) checking [GST]
Oxygen sensor heater for oxygen sensor, checking
Oxygen sensor signal wire and activation, checking
Oxygen sensors aging, oxygen sensor before catalytic converter, checking
Oxygen sensors, removing and installing

 

# code explanation

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