Circuit/System Testing: P0117
WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
Ignition ON, engine OFF, disconnect the ECT sensor and observe the ECT parameter for -38°C (-36°F).
- If over -38°C (-36°F), test the signal circuit of the ECT sensor for a short to ground or a short to any low reference circuit or an intermittent and poor connection at the control module. If it checks good, then replace the ECT sensor.
- If under -38°C (-36°F), test for an intermittent and for a poor connection at the ECT sensor. If it checks good, then replace the control module.