97 model can the ECT sensor cause starting failure
Fuel Trim System Lean (Bank 1)
Possible Causes:
Air leaks in intake manifold, exhaust pipes or exhaust manifoldFuel control sensor is out of calibration (ECT, IAT or MAF)Low fuel pressure (fuel filter clogged, pressure regulator failure)One or more injectors restricted or pressure regulator has failedHO2S element is contaminated, deteriorated or has failedVacuum hose is disconnected, broken, leaking or loose.Trouble Code: P0174
Fuel Trim System Lean (Bank 2)
Possible Causes:
Air leaks in intake manifold, exhaust pipes or exhaust manifoldFuel control sensor is out of calibration (ECT, IAT or MAF)Low fuel pressure (fuel filter clogged, pressure regulator failure)One or more injectors restricted or pressure regulator has failedHO2S element is contaminated, deteriorated or has failedVacuum hose is disconnected, broken, leaking or loose.
The engine coolant temperature (ECT) sensor is a variable resistor, that measures the temperature of the engine coolant. The powertrain control module (PCM) supplies 5 volts to the ECT signal circuit and a ground for the ECT low reference circuit. When the ECT is cold, the sensor resistance is high. When the ECT increases, the sensor resistance lowers. With high sensor resistance, the PCM detects a high voltage on the ECT signal circuit. With lower sensor resistance, the PCM detects a lower voltage on the ECT signal circuit. If the PCM detects an excessively low ECT signal voltage, which is a high temperature indication, DTC P1114 sets.
Conditions for Running the DTC
The engine run time is more than 5 seconds.
Conditions for Setting the DTC
The PCM detects an intermittent high ECT sensor temperature while the engine is running, and the run time exceeds 5 seconds.
Action Taken When the DTC Sets
The number below refers to the step number on the diagnostic table.
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replaced engine coolant temperature sensor ( the one related to the pcm) as advised by the book (ford taurus and mercury sable) and the problem disappeared.... i think is just concidence ... regards
There are quite a few things that may cause a vehicle not to start. Lets go to the beginning, what exactly is the problem & when did problem start, and what have you tried so far? Have you confirmed whether it is getting spark & fuel?
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