(DME) Condition For Fault ID - 2

27BA - P0171

Information saved in
DME

Fault code
27BA - P0171

Fault text
Fuel system, lambda/charge plausibility, bank 1

Fault description
System Too Lean (Bank 1)

Condition for fault identification
Test condition:
Deviation from mean value (depending on psau, lam, aq) in
percent is determined and compared with the max.
deviation (in relation to rpm/load factor)
KF_FPLAU_OBD_LAM_DELTA_ML_MAX * expansion
factor (KL_FPLAU_OBD_LAM_CSS_F)
Terminal condition: Engine running
Voltage condition:
none

Condition for fault memory entry
10000 ms

Action in service
1. Check the fuel system for leaks/ 2. System test routine / 3.
HFM and charge path must be flawless./ 4. Defective fuel
pressure sensor

Fault effect and breakdown warning
MIL on after engine runs 2x

Driver information
Warning light:
MIL

Service instruction
none