DTC P0174 Audi

System Too Lean Bank 2

System Too Lean Bank 2

Description

Engine speed, <800 RPM Mass air flow, <30 kg h ECT, > 48 °C OR Substitute ECT, 80.3 °C IAT, <80.3 °C Delta part load adaptation, Ready Lambda control, Closed loop EVAP purge valve, Closed If low fuel signal then wait until mass air integral, >5 kg Engine speed, 1120-6000 RPM Engine load, 14.3-90% Mass air flow, 48–600 kg h ECT, > 48 °C OR Substitute ECT, 80.3 °C IAT, <80.3 °C Fuel tank level Lambda control, Closed loop EVAP purge valve, Closed If low fuel signal then wait until mass air integral, >5 kg

Cause and Solution

EVAP vapor recovery system
Fuel pressure regulator
HO2S
MAF or MAP sensor values are incorrect or out-of-range

Video Guide

Duration: PT4M32S | Uploaded: 2020-06-20

Diagnostic Info

  • DTC Code: P0174
  • Brand: Audi
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