MSS60 Error: 277C, P114A, P114B, P2096, P2097

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277C - P114A

Information saved in DME
Fault code 277C - P114A
Fault text Oxygen sensor trim control diagnosis, bank 1
Fault description Post Catalyst Fuel Trim Via Oxygen Sensor System Too Rich (Bank 1)
Condition for fault identification Test condition: LEAN suspected under consideration of P-component ((6 (K_LA_TRIM_P_ANZ_MAX) + 3 (K_LA_TRIM_DIAG_P_SCHW P-spikes)) leads to deliberate RICH/LEAN control activation; if the pre-catalyst and post-catalyst oxygen sensors respond accordingly a trim control error is recognized.
Terminal condition: Engine running
Voltage condition: None
Condition for fault memory entry None
Action in service 1) Check intake and exhaust systems for leaks; incl. HFM operation/ ..if no fault is present..
2.) Conduct oxygen sensor test routine
3.) If the test does not produce any results and the trim control error is still present ->Replace the sensor before the catalytic converter
Fault effect and breakdown warning MIL on after engine runs 2x / no effects on drivability
Driver information Warning light: MIL
Service instruction None


277C - P114B

Information saved in DME
Fault code 277C - P114B
Fault text Oxygen sensor trim control diagnosis, bank 1
Fault description Post Catalyst Fuel Trim Via Oxygen Sensor System Too Lean (Bank 1)
Condition for fault identification Test condition: LEAN suspected under consideration of P-component ((6 (K_LA_TRIM_P_ANZ_MAX) + 3 (K_LA_TRIM_DIAG_P_SCHW P-spikes)) leads to deliberate RICH/LEAN control activation; if the pre-catalyst and post-catalyst oxygen sensors respond accordingly a trim control error is recognized.
Terminal condition: Engine running
Voltage condition: None
Condition for fault memory entry None
Action in service 1) Check intake and exhaust systems for leaks; incl. HFM operation/ ..if no fault is present..
2.) Conduct oxygen sensor test routine
3.) If the test does not produce any results and the trim control error is still present ->Replace the sensor before the catalytic converter
Fault effect and breakdown warning MIL on after engine runs 2x / no effects on drivability
Driver information Warning light: MIL
Service instruction None


277C - P114A

Information saved in DME
Fault code 277C - P114A
Fault text Oxygen sensor trim control diagnosis, bank 1
Fault description Post Catalyst Fuel Trim Via Oxygen Sensor System Too Rich (Bank 1)
Condition for fault identification Test condition: LEAN suspected under consideration of I-component (( 2 (K_LA_TRIM_DIAG_I_MIN_SCHW) recognition of I-component limit) leads to deliberate RICH/LEAN control activation; If the pre-catalyst and post-catalyst oxygen sensors respondaccordingly a trim control error is recognized.
Terminal condition: Engine running
Voltage condition: None
Condition for fault memory entry None
Action in service 1) Check intake and exhaust systems for leaks; incl. HFM operation/ ..if no fault is present..
2.) Conduct oxygen sensor test routine
3.) If the test does not produce any results and the trim control error is still present ->Replace the sensor before the catalytic converter
Fault effect and breakdown warning MIL on after engine runs 2x / no effects on drivability
Driver information Warning light: MIL
Service instruction None


277C - P2097

Information saved in DME
Fault code 277C - P2097
Fault text Oxygen sensor trim control diagnosis, bank 1
Fault description Post Catalyst Fuel Trim System Too Rich (Bank 1)
Condition for fault identification Test condition: LEAN suspected under consideration of I-component (( 2 (K_LA_TRIM_DIAG_I_MIN_SCHW) recognition of I-component limit) leads to deliberate RICH/LEAN control activation; If the pre-catalyst and post-catalyst oxygen sensors respond accordingly a trim control error is recognized.
Terminal condition: Engine running
Voltage condition: None
Condition for fault memory entry None
Action in service 1) Check intake and exhaust systems for leaks; incl. HFM operation/ ..if no fault is present..
2.) Conduct oxygen sensor test routine
3.) If the test does not produce any results and the trim control error is still present ->Replace the sensor before the catalytic converter
Fault effect and breakdown warning MIL on after engine runs 2x / no effects on drivability
Driver information Warning light: MIL
Service instruction None


277C - P114B

Information saved in DME
Fault code 277C - P114B
Fault text Oxygen sensor trim control diagnosis, bank 1
Fault description Post Catalyst Fuel Trim System Too Lean (Bank 1)
Condition for fault identification Test condition: RICH suspected under consideration of I-component (( 2 (K_LA_TRIM_DIAG_I_MAX_SCHW) recognition of I-component limit) leads to deliberate RICH/LEAN control activation; If the pre-catalyst and post-catalyst oxygen sensors respond accordingly a trim control error is recognized.
Terminal condition: Engine running
Voltage condition: None
Condition for fault memory entry None
Action in service 1) Check intake and exhaust systems for leaks; incl. HFM operation/ ..if no fault is present..
2.) Conduct oxygen sensor test routine
3.) If the test does not produce any results and the trim control error is still present ->Replace the sensor before the catalytic converter
Fault effect and breakdown warning MIL on after engine runs 2x / no effects on drivability
Driver information Warning light: MIL
Service instruction None


277C - P2096

Information saved in DME
Fault code 277C - P2096
Fault text Oxygen sensor trim control diagnosis, bank 1
Fault description Post Catalyst Fuel Trim System Too Lean (Bank 1)
Condition for fault identification Test condition: RICH suspected under consideration of I-component (( 2 (K_LA_TRIM_DIAG_I_MAX_SCHW) recognition of I-component limit) leads to deliberate RICH/LEAN control activation; If the pre-catalyst and post-catalyst oxygen sensors respond accordingly a trim control error is recognized.
Terminal condition: Engine running
Voltage condition: None
Condition for fault memory entry None
Action in service 1) Check intake and exhaust systems for leaks; incl. HFM operation/ ..if no fault is present..
2.) Conduct oxygen sensor test routine
3.) If the test does not produce any results and the trim control error is still present ->Replace the sensor before the catalytic converter
Fault effect and breakdown warning MIL on after engine runs 2x / no effects on drivability
Driver information Warning light: MIL
Service instruction None