WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, and 2010 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Circuit
Short to Ground
Open/High Resistance
Short to Voltage
Signal Performance
ECT Sensor Signal
P0117
P0118
P0118*
P0116, P0128
Low Reference
-
P0118
P0118*
P0128
*ECM or sensor damage may occur if the circuit is shorted to B+