27B2 - P0411 (DME)

27B2 - P0411

Information saved in
DME

Fault code
27B2 - P0411

Fault text
Secondary air-injection system flow rate, main branch

Fault description


Condition for fault identification
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_lam_asv_intg_norm above threshold

Action in service
1. If a vacuum-controlled secondary air-injection valve
(manufactured between 09/04 - ??/05) is still installed,
replace it.
2. Perform test on secondary air-injection pump using same
basic procedure as with test of secondary air-injection pump
using pump relay
3. Check main line for reduction in effective internal
diameter
4. Check mini-HFM, replace as indicated

Fault effect and breakdown warning
MIL is on after 2x engine cold start

Driver information
Warning light:
No

Service instruction
none