Codes never identify bad parts, just failed systems.
P0118 - ECT SENSOR VOLTAGE TOO HIGH
With the ignition ON and battery voltage greater than 10.4 volts.
The Engine Coolant Temperature (ECT) sensor circuit voltage at the PCM goes above 4.98 volts for more than 3 seconds.
Sensor ground circuit open
ECT sensor signal circuit open
ECT sensor signal circuit shorted to voltage
ECT wiring harness intermittent problem
Powertrain Control Module
Saturday, December 8th, 2012 AT 4:07 PM