What causes an ECT sensor to get an error code p0117?
The PCM expects slow change of resistance from the ECT signal circuit. As the temperature of the coolant changes, the sensor’s resistance also changes. If the PCM detects that the signal voltage is lower than the normal operating range of the sensor, then it triggers the error code P0117.
What happens to the p0117 code when coolant is warm?
As the temperature of the coolant changes, the resistance of the sensor changes. When the engine is cold, the resistance is high. When the engine is warm, the resistance is low. If the PCM detects a signal voltage lower than the normal operating range of the sensor then P0117 code will set.
What is the error code for engine coolant temperature?
Error Code P0117: Engine Coolant Temperature (ECT) Sensor Circuit Low Input. Error Code P0117 is described as Engine Coolant Temperature (ECT) Sensor Circuit Low Input. Meaning, the PCM (powertrain control module, also referred as ECM or engine control module) determined the ECT sensor output going less than 0.14V or above 284˚ F (140˚ C).
What is the voltage of a temp sensor?
No matter what supply you use, the analog voltage reading will range from about 0V (ground) to about 1.75V. If you’re using a 5V Arduino, and connecting the sensor directly into an Analog pin, you can use these formulas to turn the 10-bit analog reading into a temperature:
How to diagnose engine coolant sensor low p0117?
Start by checking the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins. What does this mean? The cost to diagnose the P0117 code is 1.0 hour of labor.
What does the code p0117 mean on the ECM?
This data is sent to the ECM, which uses this data to regulate the air to fuel ratio, cooling fans, and ignition spark timing needed by the engine. Code P0117 is the result of the ECT sensor indicating a low voltage input from the coolant temperature circuit. (approximately less than .3V) What Are the Symptoms of Code P0117?
What causes a p0117 ECT signal low input?
Potential causes of the P0117 code include: 1 Bad ECT sensor 2 Short to ground on ECT signal circuit 3 Faulty or damaged connectors 4 Wiring harness damaged 5 Loose terminals at ECT or PCM 6 POSSIBLY an overheated engine 7 Bad PCM More
What happens when the coolant temperature sensor is low?
When the engine is cold, the resistance is high. When the engine is warm, the resistance is low. If the PCM detects a signal voltage lower than the normal operating range of the sensor then P0117 code will set. An example of an Engine Coolant Temperature ECT sensor Potential symptoms include: