AutoCodes – Nissan – P0103 2003 Nissan Sentra

P0103 2003 Nissan Sentra Code - Mass Air Flow Sensor Circuit High Input

Quick Answer

The Mass Air Flow (MAF) sensor is placed in the stream of the intake air. Common causes include Dirty Air Filter, Dirty Mass Air Flow (MAF) Sensor, Intake air leaks. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0103 2003 Nissan Sentra indicates Mass Air Flow Sensor Circuit High Input.
Common causes: Common causes include Dirty Air Filter, Dirty Mass Air Flow (MAF) Sensor, Intake air leaks.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 4,470

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 18, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0103 2003 Nissan Sentra Description

The Mass Air Flow (MAF) sensor is placed in the stream of the intake air. It measures the intake flow rate by measuring a part of the entire intake flow. It consists of a hot film that is supplied with electric current from the Engine Control Module (ECM). The ECM controls the temperature of the hot film by a certain amount. The heat generated by the hot film is reduced as the intake air flows around it. The more air, the greater the heat loss. Therefore, the ECM must supply more electric current to maintain the temperature of the hot film as air flow increases. The ECM detects the air flow by means of this current change. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the MAF Sensor Signal is more than the factory specifications.

OBDII Code P0103 2003 Nissan Sentra - Mass Air Flow Sensor Circuit High Input - AutoCodes.com — P0103 2003 Nissan Sentra Code - Mass Air Flow Sensor Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0103 2003 Nissan Sentra?

Dirty Air Filter
Dirty Mass Air Flow (MAF) Sensor
Intake air leaks
Faulty Mass Air Flow Sensor
Mass Air Flow Sensor harness is open or shorted
Mass Air Flow Sensor circuit poor electrical connection

How to Fix the DTC P0103 2003 Nissan Sentra?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

Before replacing the Mass Air Flow (MAF) Sensor, try replacing the air filter and cleaning the Mass Air Flow Sensor with low compress air or Mass Air Flow Sensor Cleaner. Reset code and drive vehicle. If the code comes back, you must replace the Mass Air Flow Sensor to fix the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0103 2003 Nissan Sentra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0103 2003 Nissan Sentra code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0103 2003 Nissan Sentra Code

1. What are the common symptoms of an OBDII code P0103 on a 2003 Nissan Sentra?

- Common symptoms include poor fuel economy, rough idling, stalling, and a decrease in engine performance.

2. What does the OBDII code P0103 indicate in a 2003 Nissan Sentra?

- The code indicates a high input in the Mass Air Flow (MAF) Sensor circuit.

3. What are the possible causes of the P0103 code on a 2003 Nissan Sentra?

- Possible causes include a faulty MAF sensor, damaged wiring or connectors in the MAF circuit, or a dirty or contaminated MAF sensor.

4. How can I diagnose the cause of the P0103 code on my 2003 Nissan Sentra?

- You can start by checking the MAF sensor's wiring and connectors for any damage or corrosion. You may also need to test the MAF sensor itself using a multimeter or scan tool.

5. Can a dirty MAF sensor trigger the P0103 code on a 2003 Nissan Sentra?

- Yes, a dirty or contaminated MAF sensor can cause erratic readings and trigger the high input code P0103.

6. Is it safe to continue driving with an unresolved P0103 code on a 2003 Nissan Sentra?

- It is not recommended to drive with a P0103 code as it can lead to poor engine performance and potential damage if left unresolved.

7. How can I repair the P0103 code on my 2003 Nissan Sentra?

- Repair options may include cleaning or replacing the MAF sensor, repairing any damaged wiring or connectors, and clearing the error code with a scan tool.

8. Can a loose or disconnected air intake hose cause the P0103 code on a 2003 Nissan Sentra?

- Yes, a loose or disconnected air intake hose can cause air leaks affecting the MAF sensor readings and triggering the P0103 code.

9. How do I reset the OBDII code P0103 on a 2003 Nissan Sentra after making repairs?

- You can reset the code using an OBDII scan tool by clearing the error codes stored in the vehicle's computer system.

10. Will a P0103 code on a 2003 Nissan Sentra cause the Check Engine light to illuminate?

- Yes, the P0103 code will typically trigger the Check Engine light to illuminate on the dashboard of the 2003 Nissan Sentra.

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