check engine light was flashing???
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Joined: Jun 2003
Posts: 53
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From: central ca
check engine light was flashing???
I just got my car tuned and on the two hour drive home I had a problem five minutes before I pulled into my driveway the check engine light was flashing??? and its runnng with a bad misfire Please help
Thread Starter
Advanced
Joined: Jun 2003
Posts: 53
Likes: 0
From: central ca
Re: check engine light was flashing??? (wallstAL)
its throwing P0118 C .......it has some thing to do the P0118 Engine Coolant Temp (ECT) Sensor High Voltage
P0118 Engine Coolant Temperature (ECT) Excessive Time to Closed Loop Fuel Control what may be the problem ??? :(
P0118 Engine Coolant Temperature (ECT) Excessive Time to Closed Loop Fuel Control what may be the problem ??? :(
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From: Wilmington NC
Re: check engine light was flashing??? (Joe97)
I just got my car tuned and on the two hour drive home I had a problem five minutes before I pulled into my driveway the check engine light was flashing??? and its runnng with a bad misfire Please help
SOund like the sensor was disconnected or damaged.
Hope this helps!
The Engine Coolant Temperature (ECT) sensor contains a semiconductor device which changes the resistance based on the temperature (a thermistor). The ECT sensor is mounted in the left bank cylinder head near the front of the engine. The ECT sensor has a signal circuit and a ground circuit. The PCM applies a voltage (about 5.0 volts ) on the signal circuit to the sensor. The PCM monitors the changes in this voltage caused by changes in the resistance of the sensor in order to determine the coolant temperature.
When the coolant is cold, the sensor (thermistor) resistance is high. The PCM's signal voltage is only pulled down a small amount through the sensor to a ground. Therefore, the PCM senses a high signal voltage, or a low temperature. When the coolant is warm, the sensor resistance is low. The signal voltage is pulled down a greater amount. Therefore, the PCM senses a low signal voltage, or a high temperature. At normal operating temperature, the scan tool should display an ECT value of 1.5-2.0 volts .
When the PCM senses a signal voltage higher than the normal operating range of the sensor, this DTC will set.
CONDITIONS FOR RUNNING THE DTC
The engine run time is greater than 60 seconds .
OR
The engine run time is less than 60 seconds when the IAT is greater than 0°C (32°F) .
CONDITIONS FOR SETTING THE DTC
The ECT is less than -39°C (-38°F) .
Conditions met for 20 second .
ACTION TAKEN WHEN THE DTC SETS
The PCM illuminates the Malfunction Indicator Lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
The PCM records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the PCM stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the PCM records the operating conditions at the time of the failure. The PCM writes the conditions to the Freeze Frame and updates the Failure Records.
