27CB - P014B (DME)

27CB - P014B

Information saved in
DME

Fault code
27CB - P014B

Fault text
Oxygen sensor after cat., bank 2, gradient monitoring

Fault description
O2 Sensor Delayed Response - Lean to Rich (Bank 2 Sensor
2)

Condition for fault identification
Test condition:
* Determination of max. signal gradients at reactivation
within the voltage values
(K_LANK_OBD_WE_GRAD_US_MIN +
K_LANK_OBD_WE_GRAD_US_WIN) and
K_LANK_OBD_WE_GRAD_US_MAX (350 mV - 570
mV)
* Determination of a standardized gradient for an aged
oxygen sensor (from KL_LANK
Terminal condition: Engine running
Voltage condition:
none

Condition for fault memory entry
of max. gradient in post-cat sensor signal during WE is
determined within the voltage thresholds of
(K_LANK_OBD_WE_GRAD_US_MIN +
K_LANK_OBD_WE_GRAD_US_WIN) and
K_LANK_OBD_WE_GRAD_US_MAX

Action in service
1. Check exhaust system for leaks
2. If OK, replace post-cat oxygen sensor LSNK B2

Fault effect and breakdown warning
MIL on after engine runs 2x / no effects on drivability

Driver information
Warning light:
none

Service instruction
none