How to Fix P1374 Engine Temperature Light Monitor Failure

Introduction

If you’re experiencing the P1374 engine temperature light monitor failure, you’re not alone. This issue is common among car owners and can be frustrating to deal with. However, with the right knowledge and tools, you can fix this problem on your own. In this article, we’ll provide you with step-by-step instructions on how to fix the P1374 engine temperature light monitor failure.

What is P1374 Engine Temperature Light Monitor Failure?

P1374 is a diagnostic trouble code (DTC) that indicates a failure in the engine temperature light monitor circuit. This code is usually triggered when the engine temperature sensor fails to send a signal to the engine control module (ECM). As a result, the ECM cannot monitor the engine temperature and may cause the engine to run poorly or even stall.

Step-by-Step Guide to Fix P1374 Engine Temperature Light Monitor Failure

Step 1: Check the Engine Temperature Sensor

The first step in fixing the P1374 engine temperature light monitor failure is to check the engine temperature sensor. This sensor is located on the engine block and is responsible for sending a signal to the ECM about the engine temperature. To check the sensor, follow these steps:

1. Turn off the engine and let it cool down for at least 30 minutes.
2. Locate the engine temperature sensor on the engine block.
3. Disconnect the electrical connector from the sensor.
4. Using a multimeter, check the resistance of the sensor. The resistance should be within the manufacturer’s specifications. If it’s not, replace the sensor.

Step 2: Check the Wiring

If the engine temperature sensor is working properly, the next step is to check the wiring. The wiring may be damaged or disconnected, causing the P1374 code to appear. To check the wiring, follow these steps:

1. Inspect the wiring for any damage or corrosion.
2. Check the wiring connections for any loose or disconnected wires.
3. If you find any damage or loose connections, repair or replace the wiring as necessary.

Step 3: Check the ECM

If the engine temperature sensor and wiring are both working properly, the next step is to check the ECM. The ECM may be faulty and not receiving the signal from the engine temperature sensor. To check the ECM, follow these steps:

1. Disconnect the battery cables from the battery.
2. Remove the ECM from the vehicle.
3. Inspect the ECM for any damage or corrosion.
4. If you find any damage or corrosion, replace the ECM.

Useful Tips

• Always wear safety glasses and gloves when working on your car.
• Refer to your car’s owner’s manual for specific instructions on how to remove and replace parts.
• Use a multimeter to check the resistance of the engine temperature sensor.
• Make sure the engine is cool before working on it.

Conclusion

Fixing the P1374 engine temperature light monitor failure may seem daunting, but with the right knowledge and tools, it can be done. By following the step-by-step guide provided in this article, you can diagnose and fix the issue on your own. Remember to always wear safety gear and refer to your car’s owner’s manual for specific instructions.

FAQs

1. Can I drive my car with the P1374 engine temperature light monitor failure?

It’s not recommended to drive your car with the P1374 engine temperature light monitor failure. This issue can cause the engine to run poorly or even stall, which can be dangerous while driving.

2. How much does it cost to fix the P1374 engine temperature light monitor failure?

The cost to fix the P1374 engine temperature light monitor failure can vary depending on the cause of the issue. If it’s a simple fix like replacing the engine temperature sensor, it may only cost a few hundred dollars. However, if the ECM needs to be replaced, it can cost upwards of $1,000.

3. Can I fix the P1374 engine temperature light monitor failure on my own?

Yes, you can fix the P1374 engine temperature light monitor failure on your own if you have the right knowledge and tools. Follow the step-by-step guide provided in this article and refer to your car’s owner’s manual for specific instructions.