Aging O2 upstream of TWC (G3/3, G3/4), cycle duration | ||
1A | Fault code ( Readout on generic scan tool) | P200D Right O2 sensor upstream of TWC (G3/4) (P0133) P2080 Left O2 sensor upstream of TWC (G3/3) (P0153) |
1B | Engines 112, 113 as of 1/01 Fault code ( Readout on generic scan tool) | P200D-[1] Right O2 sensor upstream of TWC (G3/4), cycle duration too long (P0133) P200D-[2] Right O2 sensor upstream of TWC (G3/4), cycle duration too short (P0133) P2080-[1] Left O2 sensor upstream of TWC (G3/3), cycle duration too long (P0153) P2080-[2] Left O2 sensor upstream of TWC (G3/3), cycle duration too short (P0153) |
2 | Fault storage Actuation of the engine diagnosis indicator lamp (EURO3/4) 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 for O2 upstream of TWC |
5 | Fault setting conditions | Fault if the cycle duration is greater that 4 seconds (average value from 16 measurements). |
6 | Check prerequisites | - engine speed approx. 1000 to 1800 rpm - load approx. 15 up to 50% - lambda controls enabled - no high loading of activated carbon filter (lambda greater than 0.4) - no fault in O2 sensor heater - 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. |