P0175 on Audi
System Too Rich (Bank 2)
P0175 on Audi vehicles indicates system too rich (bank 2). Au7o has documented this code across 1 Audi model — most commonly on S8. P0175 is a generic OBD-II code meaning the engine computer detected that the air-fuel mixture on bank 2 is too rich, with too much fuel relative to air. The computer has had to remove fuel (negative fuel trim) to try to correct it but has reached its adjustment limit. Bank 2 is the cylinder bank that does not contain cylinder #1. A persistently rich mixture wastes fuel, causes rough running, and can overheat and damage the catalytic converter over time.
Common Causes of P0175
- •Dirty or faulty mass air flow (MAF) sensor
- •Leaking or stuck-open fuel injector
- •Excessive fuel pressure / faulty fuel pressure regulator
- •Faulty or contaminated oxygen sensor
- •Engine vacuum leak or false air reading
- •Dirty/clogged air filter or restricted intake
- •Leaking fuel injector O-rings or fuel saturation
- •Faulty coolant temperature sensor skewing fuel trims
P0175 on Audi by Model
Audi S8(1 issue)
- 2013-2018 S8 Warm-Soak Long-Crank or No-Start - Fuel Diagnosis Required2013-2018
Audi TSB 2046724/5 covers sporadic warm-engine no-start or long cranking after the vehicle sits without fully cooling. A rich-mixture DTC may occur, but often there is no DTC. Audi’s procedure distinguishes fuel in the oil from a short-trip profile, ECM software, high-pressure injector leakage and high-pressure fuel-pump leakage rather than assuming one failed component.
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View P0175 across all makes →Frequently Asked Questions
What does P0175 mean on Audi?▼
P0175 stands for "System Too Rich (Bank 2)." P0175 is a generic OBD-II code meaning the engine computer detected that the air-fuel mixture on bank 2 is too rich, with too much fuel relative to air. The computer has had to remove fuel (negative fuel trim) to try to correct it but has reached its adjustment limit. Bank 2 is the cylinder bank that does not contain cylinder #1. A persistently rich mixture wastes fuel, causes rough running, and can overheat and damage the catalytic converter over time. On Audi specifically, this code is documented across 1 model.
What causes P0175 on Audi vehicles?▼
Common causes on Audi: Dirty or faulty mass air flow (MAF) sensor, Leaking or stuck-open fuel injector, Excessive fuel pressure / faulty fuel pressure regulator, Faulty or contaminated oxygen sensor, Engine vacuum leak or false air reading. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0175 on a Audi?▼
Repair costs vary widely depending on the root cause and specific Audi model.
Which Audi models have P0175 documented?▼
Au7o has documented P0175 on 1 Audi model: S8.