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Home >> Chevrolet >> 2003 >> Chevy Express H2500 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 16 (Engine Controls Self-Diagnostics - 4.3L) >> Diagnostic Tests >> DTC P0116: ECT Sensor Performance >> Conditions For Setting DTC

Conditions For Setting DTC

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If the PCM detects a temperature difference of more than 27°F (15°C) between the ECT and the IAT, the vehicle must be driven for 8 minutes over 15 MPH. If the IAT sensor temperature decreases more than 5°F (3°C) then a block heater is indicated and the test is aborted. If the IAT temperature does not decrease, a block heater was not detected and DTC P0116 sets.

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