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Chevrolet
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2003
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TrailBlazer 5.3 P, RWD
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Repair and Diagnosis
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Engine Performance
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System
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Engine Control System - Self-Diagnostics - 5.3L
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Diagnostic Tests
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DTC P0125: Excessive Time To Enter Closed Loop Fuel Control
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Conditions For Setting DTC
Conditions For Setting DTC
The PCM detects that the calibrated amount of engine run time has been met.
The calibrated amount of engine air flow has been met.
The engine coolant temperature for Closed Loop of 90° F (34° C) has not been met.