$09 Time between two transitions

Fig 1: Identifying $09 Time Between Two Transitions Value (Mode 5)

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The required range and the actual value are indicated.

Fig 2: Identifying $09 Transition Required Range & Actual Value (Mode 5)

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A - sensor OK

B - sensor characteristic offset e.g. by silicon.

C - sensor characteristic offset e.g. by lead.

D1 - sensor offset toward leaner mixture (PID 31)

D2 - sensor offset toward richer mixture (PID 30).