Circuit/System Testing: P0117
WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. 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, a short to any low reference circuit. If the ECT circuits check OK, replace the ECT sensor.
- If under -38°C (-36°F), test for an intermittent and a poor connection at the ECT sensor. If the ECT circuits check OK, replace the control module.