AutoCodes – Nissan – P0103 2012 Nissan Pathfinder

P0103 2012 Nissan Pathfinder 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 2012 Nissan Pathfinder 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 5,593

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 2012 Nissan Pathfinder 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 2012 Nissan Pathfinder - Mass Air Flow Sensor Circuit High Input - AutoCodes.com — P0103 2012 Nissan Pathfinder Code - Mass Air Flow Sensor Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0103 2012 Nissan Pathfinder?

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 2012 Nissan Pathfinder?

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 2012 Nissan Pathfinder 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 2012 Nissan Pathfinder 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 2012 Nissan Pathfinder Code

1. What are the common symptoms of OBDII code P0103 in a 2012 Nissan Pathfinder?

- Common symptoms include a check engine light, rough idling, engine stalling, poor acceleration, and decreased fuel efficiency.

2. What does the OBDII code P0103 "Mass Air Flow Sensor Circuit High Input" mean for a 2012 Nissan Pathfinder?

- This code indicates that the mass air flow sensor is detecting a higher than normal voltage input, potentially leading to incorrect air/fuel mixture readings.

3. What are the possible causes of OBDII code P0103 in a 2012 Nissan Pathfinder?

- Causes can include a faulty mass air flow sensor, dirty or contaminated sensor, damaged sensor wiring, vacuum leaks, or issues with the air intake system.

4. How can I diagnose the issue causing OBDII code P0103 in my 2012 Nissan Pathfinder?

- To diagnose, you can visually inspect the sensor and its wiring, perform a voltage test on the sensor, check for air leaks, and use a scan tool to monitor sensor readings.

5. Can driving with OBDII code P0103 in a 2012 Nissan Pathfinder cause further damage?

- Continued driving with this code can potentially lead to poor engine performance, increased emissions, and further damage to the engine components over time.

6. How can I repair OBDII code P0103 in a 2012 Nissan Pathfinder?

- Repairs may involve cleaning or replacing the mass air flow sensor, repairing damaged wiring, fixing vacuum leaks, or addressing any issues in the air intake system.

7. Is it safe to reset the OBDII code P0103 in a 2012 Nissan Pathfinder using a scan tool?

- While resetting the code may temporarily turn off the check engine light, it is important to address the underlying issue causing the code to prevent further problems.

8. Can a dirty air filter trigger OBDII code P0103 in a 2012 Nissan Pathfinder?

- A dirty air filter can restrict airflow and potentially cause incorrect readings by the mass air flow sensor, leading to the triggering of this code.

9. How long does it typically take to repair OBDII code P0103 in a 2012 Nissan Pathfinder?

- The repair time can vary depending on the exact cause of the code, but it may take anywhere from 30 minutes to a few hours to diagnose and fix the issue.

10. Should I seek professional help to address OBDII code P0103 in my 2012 Nissan Pathfinder?

- If you are not familiar with diagnosing or repairing automotive issues, it is recommended to seek the assistance of a qualified mechanic to properly address the code and prevent further complications.