AutoCodes – Nissan – P0103 2008 Nissan Sentra

P0103 2008 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 2008 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 4,190

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 2008 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 2008 Nissan Sentra - Mass Air Flow Sensor Circuit High Input - AutoCodes.com — P0103 2008 Nissan Sentra Code - Mass Air Flow Sensor Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0103 2008 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 2008 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 2008 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 2008 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 2008 Nissan Sentra Code

1. What are the common symptoms of OBDII code P0103 in a 2008 Nissan Sentra?

- Common symptoms include rough idling, stalling, poor acceleration, decreased fuel efficiency, and the illumination of the Check Engine Light.

2. What does the OBDII code P0103 indicate in a 2008 Nissan Sentra?

- The code P0103 indicates a high input signal from the mass air flow (MAF) sensor circuit in the 2008 Nissan Sentra.

3. What are the possible causes of OBDII code P0103 in a 2008 Nissan Sentra?

- The common causes include a dirty or faulty MAF sensor, a vacuum leak in the intake system, a damaged air intake hose, or issues with the wiring or connectors.

4. How can I diagnose the OBDII code P0103 in my 2008 Nissan Sentra?

- You can diagnose the code P0103 by visually inspecting the MAF sensor and its connectors, checking for any visible damage or contamination. Additionally, using a multimeter to test the sensor's voltage output can help identify the issue.

5. Can a dirty air filter trigger the OBDII code P0103 in a 2008 Nissan Sentra?

- Yes, a dirty air filter can restrict airflow to the MAF sensor, causing incorrect readings and potentially triggering the code P0103.

6. How can I repair the OBDII code P0103 in my 2008 Nissan Sentra?

- You can start by cleaning or replacing the MAF sensor, checking and repairing any damaged wiring or connectors, inspecting and fixing any vacuum leaks, and ensuring the air intake system is free from obstructions.

7. Is it safe to continue driving my 2008 Nissan Sentra with the OBDII code P0103?

- It is not recommended to continue driving with the code P0103 present, as it can lead to poor engine performance, reduced fuel efficiency, and potential damage to other components over time.

8. Can I reset the OBDII code P0103 in my 2008 Nissan Sentra using an OBDII scanner?

- Yes, you can use an OBDII scanner to reset the code P0103 after addressing the underlying issue. However, if the root cause is not fixed, the code is likely to reappear.

9. Will replacing the MAF sensor resolve the OBDII code P0103 in my 2008 Nissan Sentra?

- Replacing the MAF sensor is a common solution for the code P0103, especially if the sensor is dirty or faulty. However, it is essential to diagnose the issue accurately before replacing any parts.

10. How much does it typically cost to repair the OBDII code P0103 in a 2008 Nissan Sentra at a professional auto repair shop?

- The repair cost for the OBDII code P0103 can vary depending on the root cause and the shop's labor rates. On average, the repair cost can range from $100 to $300, including parts and labor.