The automobile fault code P1118 indicates a problem with the Engine Coolant Temperature (ECT) sensor. This can result in the Engine Light or Service Engine Soon Warning Light turning on.

The possible causes include a faulty ECT sensor, low engine coolant level, open or shorted ECT sensor harness, poor connection in the ECT sensor electrical circuit, or a faulty engine coolant thermostat. To fix this issue, you should visually inspect the wiring harness and connectors, checking for any damage or corrosion.

Additionally, look for broken, bent, pushed out, or corroded connector pins.

The repair time for this issue is estimated to be 1.0.

It is important to address this problem promptly to prevent further damage to the engine.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level6.67 (Out of 10)

When the p1118 fault code appears, the Engine Light will illuminate, indicating the presence of a problem.

  • The symptoms of the automobile fault code p1118 include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.

The automobile fault code p1118 can be caused by a faulty Engine Coolant Temperature (ECT) sensor, low engine coolant level, open or shorted ECT sensor harness, poor connection in the ECT sensor electrical circuit, or a faulty engine coolant thermostat.

  • The fault code P1118 can be caused by a faulty Engine Coolant Temperature (ECT) sensor, low engine coolant level, an open or shorted ECT sensor harness, a poor connection in the ECT sensor electrical circuit, or a faulty engine coolant thermostat.

To fix the p1118 fault code, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code p1118, start by checking the possible causes mentioned above.
  • Then, visually inspect the wiring harness and connectors related to the issue.
  • Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins.
  • The estimated repair time for this fix is 1.0 hour.

The factors influencing the cost of diagnosing and fixing the automobile fault code p1118 are the estimated repair time of 1.0 hour and the typical auto repair shop charges of $75 to $150 per hour.

The P1118 fault code indicates that the Engine Coolant Temperature (ECT) sensor is reporting a signal voltage that is higher than the expected range. The ECT sensor is a semiconductor device that measures the temperature of the engine coolant. It changes its resistance based on the temperature, allowing the Powertrain Control Module (PCM) to determine the coolant temperature.

When the engine coolant is cold, the sensor resistance is high, and the PCM detects a high signal voltage, indicating a low temperature. Conversely, when the coolant is warm, the sensor resistance is low, and the PCM detects a low signal voltage, indicating a high temperature.

In the case of the P1118 fault code, the ECT sensor is reporting a signal voltage that is higher than what is expected for the given coolant temperature. This could be caused by a faulty ECT sensor, a wiring issue, or a problem with the PCM itself.

It is important to diagnose and fix this issue promptly to ensure proper engine performance and prevent potential damage.

How can I determine if the Engine Coolant Temperature (ECT) sensor is faulty when I have the fault code p1118?

If you’re seeing the Engine Light ON or the Service Engine Soon Warning Light and have the fault code p1118, it could indicate a faulty Engine Coolant Temperature (ECT) sensor. Other possible causes include low engine coolant level, open or shorted ECT sensor harness, poor connection in the ECT sensor electrical circuit, or a faulty engine coolant thermostat. To determine if the ECT sensor is faulty, visually inspect the wiring harness and connectors, checking for any damage or corrosion. Also, look for broken, bent, pushed out, or corroded pins in the connectors.

What steps should I take to check the engine coolant level when the Engine Light is ON and I have the fault code p1118?

If your Engine Light is ON and you have the fault code p1118, there are a few steps you can take to check the engine coolant level. First, visually inspect the wiring harness and connectors related to the Engine Coolant Temperature (ECT) sensor. Look for any damage or broken, bent, pushed out, or corroded connector pins. Next, check the possible causes listed above, including a faulty ECT sensor, low engine coolant level, or a faulty engine coolant thermostat. By following these steps, you can diagnose and potentially fix the issue causing the Engine Light to come on.

What are the possible causes for the Engine Coolant Temperature (ECT) sensor harness to be open or shorted when I encounter the fault code p1118?

If you’re seeing the fault code p1118 and your engine light is on, it could be due to a few possible causes. One of them is a faulty Engine Coolant Temperature (ECT) sensor. Another cause could be a low engine coolant level. Additionally, the ECT sensor harness might be open or shorted, or there could be a poor connection in the electrical circuit of the ECT sensor. Lastly, a faulty engine coolant thermostat could also be the culprit. To fix this issue, you should visually inspect the wiring harness and connectors, checking for any damage or corrosion. Make sure to look out for broken, bent, pushed out, or corroded connector pins as well.

p1118 error fault code explained

If your engine light is on and you’re seeing the P1118 fault code, it could be due to a faulty Engine Coolant Temperature (ECT) sensor, low coolant level, or a problem with the ECT sensor harness or electrical circuit. To fix it, visually inspect the wiring harness and connectors for any damage, and check for broken or corroded pins.

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