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Home >> Chevrolet >> 2003 >> Impala Base, 3.4 E >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Control System Self-Diagnostics - 3.8L) >> Diagnostic Tests >> DTC P0116: ECT Sensor Circuit Performance >> Conditions For Setting DTC

Conditions For Setting DTC

WARNING: This page is about a different variant/trim than selected.

The PCM may detect a temperature difference between the ECT and the IAT of more than 180°F (100°C).

The time spent cranking the engine, within starting is more than 5 seconds with a temperature difference between the ECT sensor and the IAT sensor of more than 27°F (15°C).

The PCM detects a temperature difference between the ECT sensor of more than 27°F (15°C), then the vehicle must be driven for 5 minutes over 15 MPH. If the IAT sensor temperature decreases more than 12.6°F (7°C) then a block heater is detected and the test is aborted. If the IAT sensor temperature does not decrease, then a block heater was not detected and DTC P0116 sets.

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