Decoding The P1140 Nissan Trouble Code

Do you notice the P1140 Nissan trouble code in your vehicle while driving?

You may be wondering why this error code shows up and what you need to do about it. It is definitely concerning when errors come up in your vehicle. You are left concerned if this is a big issue that needs to be resolved immediately or not.

In today’s post, we will uncover the meaning behind this trouble code and what you should do about it. Here we go!

p1140 nissan

Causes of The P1140 Nissan Error Code

The P1140 trouble code specific to Nissan vehicles pertains to a problem associated with the intake valve timing control position sensor. Specifically, it indicates a malfunction in the Bank 1 sensor circuit.

The intake valve timing control position sensor plays a critical role in monitoring the camshaft’s position in relation to the crankshaft. This information is vital for the engine’s timing and fuel delivery. When the engine control module (ECM) detects an issue or malfunction in the Bank 1 sensor circuit, it triggers the P1140 fault code.

Several potential causes can trigger the P1140 code, including:

1. Malfunctioning intake valve timing control position sensor

The sensor may be faulty, leading to incorrect readings or overall dysfunction.

2. Open or shorted sensor circuit

Wiring problems, such as loose connections, broken wires, or short circuits within the sensor circuit, may be present.

3. Defective ECM

In rare instances, the engine control module itself might be faulty, resulting in an improper interpretation of the sensor data.

When the P1140 code is detected, the vehicle’s Check Engine Light will illuminate on the dashboard. In some cases, drivability issues may arise, such as reduced power output or rough idling.

To diagnose and rectify the problem, it is advisable to seek the assistance of a qualified mechanic or visit a Nissan dealership. These professionals employ specialized diagnostic equipment to pinpoint the exact cause of the issue. 

They may conduct tests on the intake valve timing control position sensor, inspect the sensor circuitry for any faults, and assess the ECM’s functionality. Once the root cause is identified, necessary repairs or component replacements can be undertaken.

Promptly addressing the P1140 code is crucial to ensure optimal engine performance and prevent potential damage to the vehicle’s drivetrain.

Signs Of P1140 Nissan Code Issues

When the intake valve timing control position sensor in a Nissan is experiencing issues, several signs may indicate a problem. These signs can vary depending on the severity and specific nature of the sensor malfunction. Check out these signs that trigger the P1140 Nissan trouble code:

1. Check Engine Light

The first and most noticeable sign of a problem with the intake valve timing control position sensor is the illumination of the Check Engine Light on the vehicle’s dashboard. This indicates that the engine control module (ECM) has detected an issue with the sensor or its circuit.

2. Reduced Engine Performance

A malfunctioning sensor can affect the engine’s timing and fuel delivery, leading to reduced performance. You may notice a decrease in engine power, sluggish acceleration, or difficulty maintaining speed.

3. Rough Idling

An irregular or rough idling engine is another possible sign of a faulty intake valve timing control position sensor. The sensor helps regulate the air and fuel mixture, and if it provides incorrect data to the ECM, it can disrupt the engine’s idle operation.

4. Poor Fuel Efficiency

A malfunctioning sensor can cause the engine to run less efficiently, resulting in reduced fuel efficiency. If you notice a sudden decrease in gas mileage without any other apparent cause, it could be related to a problem with the intake valve timing control position sensor.

5. Engine Misfires

In some cases, a faulty sensor can contribute to engine misfires. Misfires occur when the air-fuel mixture does not ignite properly in one or more cylinders. If you experience engine misfires, such as sputtering or a noticeable loss of power, it could be a symptom of a sensor issue.

6. Difficulties Starting the Engine

A malfunctioning intake valve timing control position sensor can make it more challenging to start the engine. You may experience extended cranking times or require multiple attempts to start the vehicle.

It’s important to note that these signs can also be indicative of other engine-related problems. Therefore, it is recommended to have the vehicle diagnosed by a qualified mechanic or Nissan dealership. They can use diagnostic tools to retrieve specific error codes and perform further tests to identify the precise cause of the issue.

Addressing any problems with the intake valve timing control position sensor promptly is essential to ensure proper engine performance, fuel efficiency, and to prevent potential damage to the engine.

Read More: P1456 Nissan Trouble Code You Should Know


To prevent the occurrence of the P1140 trouble code in Nissan vehicles, you can follow these preventive measures:

1. Adhere to your vehicle’s recommended maintenance schedule, including oil changes, filter replacements, and inspections. This helps ensure that all components, including the intake valve timing control position sensor, are functioning properly.

2. Use high-quality fuel from reputable gas stations to maintain optimal engine performance. Poor-quality fuel can contribute to sensor malfunctions and other engine issues.

3. Practice smooth and cautious driving habits to reduce strain on the engine and its components. Avoid aggressive acceleration, excessive idling, and rapid deceleration, which can contribute to sensor failures.

4. Prevent your engine from overheating by maintaining proper coolant levels, ensuring the radiator and cooling system are functioning correctly, and promptly addressing any cooling system issues.

If you notice any symptoms of engine trouble, such as unusual noises, poor performance, or illuminated warning lights, have your vehicle inspected and repaired by a qualified mechanic promptly. Addressing issues early can prevent them from escalating into more significant problems.

By following these preventive measures and maintaining your vehicle in good condition, you can minimize the likelihood of experiencing the P1140 trouble code and other related issues in your Nissan.

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