Aging of O2 sensor upstream of TWC - fault code description ME

AD07.61-P-4000-07LA

Aging of O2 sensor upstream of TWC - fault code description ME

Engine 137.970



Aging of O2 sensor upstream of TWC (G3/7 to G3/10), cycle duration too long

1

Fault code

( Readout on generic scan tool)

P2080 Right O2 sensor upstream of TWC for cylinders 4 to 6 (P0133)

P20A7 Left O2 sensor upstream of TWC for cylinders 7 to 9 (P0153)

P20A8 Left O2 sensor upstream of TWC for cylinders 10 to 12 (P0153)

P200D Right O2 sensor upstream of TWC for cylinders 1 to 3 (P0133)

2

Fault storage

Actuation of engine diagnosis indicator lamp (EURO4)

or CHECK ENGINE (MIL) malfunction indicator lamp 

after expiry of test duration and fault

following two successive driving cycles with faults

3

Checking frequency

Continuous

4

Checked signal or status

Signal from O2 sensor upstream of TWC, cycle duration too long

5

Fault setting conditions

Fault if the cycle duration is greater than 4.5 seconds
(average value from 16 measurements)

6

Check prerequisites

- engine speed 1000 to 2100 rpm

- load approx. 20 up to 60%

- lambda controls enabled

- no fault in O2 sensor heater

- no high loading of activated carbon filter (lambda greater than 0.4)

- no CAN fault

7



The average cycle duration is compared with an upper and lower limit value. In the case of the effect of simultaneous faults on the catalytic converter tighter limits apply so that a fault can be recognized more quickly.