[kln1920]

Pytanie, czy ma to w ogóle związek z EGR... Znalazłem takie info na forum forscana:

EGR error, as a percent of commanded EGR. Often, EGR valve control outputs are not in the same engineering units as the EGR
feedback input sensors. For example, an EGR valve can be controlled using a duty-cycled vacuum solenoid, however, the feedback
input sensor is a position sensor. This makes it impossible to display "actual" versus "commanded" in the same engineering units . EGR
error solved this problem by displaying a normalised (non-dimensional) EGR system feedback parameter. EGR error is defined to be:

(actual EGR – commanded EGR) / commanded EGR.

For example if 10% EGR is commanded and 5% is delivered to the engine, the EGR_ERR is (5% – 10%) / 10 = -50% error.
EGR_ERR may be computed using various control parameters such as position, steps, counts, etc. All EGR systems must react to
quickly changing conditions in the engine; therefore, EGR_ERR will generally show errors during transient conditions. Under steady
condition, the error will be minimised (no necessarily zero, however) if the EGR system is under control.
If the control system does not use closed loop control, EGR_ERR shall not be supported.
When commanded EGR is 0%, EGR error is technically undefined. In this case EGR error should be set to 0% when actual EGR = 0%
or EGR error should be set to 99.2% when actual EGR > 0%.

Może lepiej zacząć od podstaw, skoro widać, że przepływa mniej powietrza, to może wyciągnąć i przeczyścić przepływkę, zobaczyć w jakim stanie jest filtr powietrza, szczelność dolotu?