P0492

27B1 - P0492

Informati

on saved

in
DME

Fault

code
27B1 - P0492

Fault text
Secondary air-injection system flow rate, Bank 2

Fault

descriptio

n


Condition

for fault

identifica

tion
Test condition:
Continuous compliance with secondary air-injection system conditions
Terminal condition: Engine running
Voltage condition:
ub > K_DIAG_TR_Plus_Min

Condition

for fault

memory

entry
sls_obdh_mdf_max_intg_norm (after roughly 30 sec.)
sls_obdh_lam_asv_intg_norm >
k_Sekund�rluftsystem_OBDH_MDF_1_MAG or
sls_obdh_lam_asv_intg_norm >
k_Sekund�rluftsystem_OBDH_Absperrventil_LI_OPE and
K_Sekund�rluftsystem_OBDH_MDF_Min_DEF>K_Sekund�rluftsystem_
OBDH_MDF_Max_DEF

Action in

service
1. Disconnect secondary air-injection line
2. Perform system test
3. If the flow rate is too high replace the shutoff valve
4. Otherwise check line 2 for obstructions and replace as required

Fault

effect and

breakdow

n

warning
MIL is on after 2x engine cold start

Driver

informati

on
Warning light:
No

Service

instructio

n
none