MSS60 Error: 27BA, P0171, P0172, P0177, P0178

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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
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


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


27BA - P2177

Information saved in DME
Fault code 27BA - P2177
Fault text Fuel system, lambda/charge plausibility, bank 1
Fault description System Too Lean Off Idle (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
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


27BA - P2177

Information saved in DME
Fault code 27BA - P2177
Fault text Fuel system, lambda/charge plausibility, bank 1
Fault description System Too Lean Off Idle (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


27BA - P0172

Information saved in DME
Fault code 27BA - P0172
Fault text Fuel system, lambda/charge plausibility, bank 1
Fault description System Too Rich (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
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


27BA - P0172

Information saved in DME
Fault code 27BA - P0172
Fault text Fuel system, lambda/charge plausibility, bank 1
Fault description System Too Rich (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


27BA - P2178

Information saved in DME
Fault code 27BA - P2178
Fault text Fuel system, lambda/charge plausibility, bank 1
Fault description System Too Rich Off Idle (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
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


27BA - P2178

Information saved in DME
Fault code 27BA - P2178
Fault text Fuel system, lambda/charge plausibility, bank 1
Fault description System Too Rich Off Idle (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