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Home >> Chevrolet >> 2006 >> TrailBlazer 4.2 S, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 4.2L - DTC P0013 To P0134 >> DTC P0121 >> Conditions for Setting the DTC

Conditions for Setting the DTC

The PCM detects that the calculated airflow rate is more than expected.
The above condition is present for more than 12.5 milliseconds.

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