AD07.61-P-4000-09AA | Self-adaptation of mixture formation at its limit - fault code description ME-SFI | |
Self adaptation of the mixture formation is at the limit value, between idle and partial load | ||
1A | Fault code ( Readout on generic scan tool) | P2018 for the right cylinder bank (P0170) P2087 for the left cylinder bank (P0173) |
1B | Engines 112, 113 as of 1/01 Fault code ( Readout on generic scan tool) | P2018-[1] for the right cylinder bank, mixture correction too great (P0170) P2018-[2] for the right cylinder bank, mixture correction too small (P0170) P2087-[1] for the left cylinder bank, mixture correction too great (P0173) P2087-[2] for the left cylinder bank, mixture correction too small (P0173) |
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 no actuation |
3 | Checking frequency | Continuous |
4 | Checked signal or status | Limits for self adaptation of mixture formation |
5 | Fault setting conditions Limit value, additive correction Limit value, multiplicative correction Mixture too rich. Mixture too lean. Checking duration |
Approx. 1.0 ms (equivalent to approx. 40% of the injection time in idle) Factor 0.7 up to 1.3 The injection time must be reduced by more than 30% (in idle by more than 1 ms) (lean stop). The injection time must be extended by more than 30% (in idle by more than 1 ms) (rich stop). At least 400 seconds. |
6 | Check prerequisites | - lambda control enabled - function of self adaptation of mixture formation enabled - coolant temperature greater than 70°C - no engine oil dilution due to fuel - no fault on coolant temperature sensor, hot film MAF sensor, O2 sensors, air injection and leaktightness of the purge system . |
7 | | In order to determine a new value for the mixture formation self adaptation, it is necessary to undertake a journey of approx. 20 minutes with enabled lambda control. |
P07.61-2529-11
Self adaptation of mixture formation
1 Idle speed range
2 Area between idle speed and part load
3 Partial load range
E Quantity injected
N Engine speed