Conditions For Setting DTC
WARNING: This page is about a different car, the 2003 Cadillac Seville and 2003 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
One of the following conditions must be attained for setting the DTC.
- The PCM detects a temperature difference between the ECT sensor and the IAT sensor of more than 180°F (100°C) at start up.
- The time spent cranking the engine without starting is more than 5 seconds, with a temperature difference between the ECT sensor and the IAT sensor more than 27°F (15°C).
- The PCM detects a temperature difference between the ECT sensor and the IAT 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.