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Home >> Chevrolet >> 1999 >> Tracker 4D Utility, 4WD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Diagnostic Tests >> DTC P0121: Throttle Position (TP) Sensor Performance >> Condition For Running DTC

Condition For Running DTC

Engine speed less than 3500 RPM and maximum air flow rate 25.5 grams/second or greater with MAP sensor less than 26 kPa with throttle valve open less than 35 degrees, or MAP sensor greater than 67 kPa with throttle valve open greater than 35 degrees.