Part 2
Oxygen Sensing Error By Means of Short Test, Bank 1 - Below Limit
P1134
Oxygen Sensing Error by means of Short Test, Bank 1 - Below Limit
Function
The adaptive oxygen sensing system corrects longer lasting deviations in the fuel/air mixture from lambda = 1 by changing the anticipatory control
calculated in the DME control module and the injection timing altered as a result. Should the correction factor through adaptation exceed a
predetermined value, the diagnosis will detect the adaptation threshold.
Diagnosis conditions
- "Mixture adaptation" short test performed with the Porsche System Tester 2
P1127 - P1134
NOTE: If DTC P0445 (EVAP canister purge valve - short to ground) is stored in the memory, correct this fault first. An open EVAP canister
purge valve can lead to the lean threshold being reached.