1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
Joined
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17,277 Posts
Welcome to Allpar. Solve for P0118- ECT voltage too high. This can be a poor or open ground in the connectors, wiring or PCM. Inspect all. It can affect more than the tmperature value reading.
I found oxidized sensor terminals on my wife's 2001 3.3L Caravan. Cleaning them eliminated P0118.
I had to remove the P/S fluid reservior and ign coil to get at the sensor.
P0118-ECT SENSOR VOLTAGE TOO HIGH
When Monitored: With the ignition on. Battery voltage greater than 10 volts.
Set Condition: The Engine Coolant Temperature (ECT) sensor circuit voltage at the PCM
is greater than 4.96 volts for more than 2.6 seconds.
POSSIBLE CAUSES:
INTERMITTENT CONDITION
ECT SENSOR SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
ECT SENSOR INTERNAL FAILURE
ECT SENSOR SIGNAL CIRCUIT OPEN
SENSOR GROUND CIRCUIT OPEN
PCM
I found oxidized sensor terminals on my wife's 2001 3.3L Caravan. Cleaning them eliminated P0118.
I had to remove the P/S fluid reservior and ign coil to get at the sensor.
P0118-ECT SENSOR VOLTAGE TOO HIGH
When Monitored: With the ignition on. Battery voltage greater than 10 volts.
Set Condition: The Engine Coolant Temperature (ECT) sensor circuit voltage at the PCM
is greater than 4.96 volts for more than 2.6 seconds.
POSSIBLE CAUSES:
INTERMITTENT CONDITION
ECT SENSOR SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
ECT SENSOR INTERNAL FAILURE
ECT SENSOR SIGNAL CIRCUIT OPEN
SENSOR GROUND CIRCUIT OPEN
PCM