MSS60 Error: 275D, P0171, P0172

Information saved in	DME
Fault code	275D - P0171
Fault text	Oxygen sensor limit position fault, bank 1
Fault description	System Too Lean (Bank 1)
Condition for fault identification	Test condition: Controller pegged at the MIN threshold 0.75 (K_LAM_REG_F_MIN) for at least a period of 30 sec. K_LAM_DIAG_REG_T
	Terminal condition: Engine running
	Voltage condition: none
Condition for fault memory entry	Controller limit for K_LAM_DIAG_REG_T (60s)
Action in service	1. Check fuel system for leaks, initiate test routine as indicated
	2. Check exhaust system for leaks
	3. Check HFM for leaks and correct operation
	4. Read out oxygen sensor diagnostic data, perform both oxygen sensor test routines as indicated
Fault effect and breakdown warning	Engine runs erratically
	Potential collateral error: Miss errors and lamda error MIL after engine runs 2x
Driver information	Warning light: MIL
Service instruction	None

Information saved in	DME
Fault code	275D - P0172
Fault text	Oxygen sensor limit position fault, bank 1
Fault description	System Too Rich (Bank 1)
Condition for fault identification	Test condition: Controller pegged at MAX threshold 1.25 (K_LAM_REG_F_MAX) for time of at least 30 sec. (K_LAM_DIAG_REG_T)
	Terminal condition: Engine running
	Voltage condition: none
Condition for fault memory entry	Controller limit for K_LAM_DIAG_REG_T (60s)
Action in service	1. Check fuel system for leaks, initiate test routine as indicated
	2. Check exhaust system for leaks
	3. Check HFM for leaks and correct operation
	4. Read out oxygen sensor diagnostic data, perform both oxygen sensor test routines as indicated
Fault effect and breakdown warning	Engine runs erratically
	Potential collateral error: Miss errors and lamda error MIL after engine runs 2x
Driver information	Warning light: MIL
Service instruction	None

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