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Home >> BMW >> 2008 >> 528xi Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1653 (Self Diagnosis - Theory & Operation (S85)) >> Fuel System Monitoring >> Trim Control Plausibility Monitoring >> Monitoring function: P- / I-Share

Monitoring function: P- / I-Share

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The trim control plausibility monitoring detects a high deviation of the l-share of lambda trim control or exceeding the number of P-jumps greater than an application threshold. If this happens the following malfunction is detected:

Fuel trim above limit - system too lean or system too rich 

If the mentioned malfunction is detected, the corresponding fault code is stored.

Malfunction for I-share: 

For fuel trim system too lean: P2096 / P2098

For fuel trim system too rich: P2097 / P2099

Malfunction for P-share: 

For fuel trim system too rich: P114A / P114C

For fuel trim system too lean: P114B / P114D