AutoCodes – Nissan – P0103 2007 Nissan Pathfinder

P0103 2007 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 2007 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 3,411

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 2007 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 2007 Nissan Pathfinder - Mass Air Flow Sensor Circuit High Input - AutoCodes.com — P0103 2007 Nissan Pathfinder Code - Mass Air Flow Sensor Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0103 2007 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 2007 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 2007 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 2007 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 2007 Nissan Pathfinder Code

1. What does the OBDII code P0103 mean on a 2007 Nissan Pathfinder?

P0103 indicates a "Mass Air Flow (MAF) Sensor Circuit High Input," meaning the MAF sensor is sending a voltage signal to the Engine Control Module (ECM) that is higher than expected.

2. What are common symptoms of the P0103 code in a 2007 Nissan Pathfinder?

Common symptoms include poor engine performance, rough idling, reduced fuel efficiency, difficulty starting, and an illuminated Check Engine Light.

3. What causes the P0103 code in a 2007 Nissan Pathfinder?

Possible causes include a faulty MAF sensor, damaged or disconnected wiring, a dirty or clogged air filter, or air leaks in the intake system.

4. Can I drive my 2007 Nissan Pathfinder with the P0103 code?

While the vehicle may still be drivable, it is not recommended as it can lead to poor performance, higher emissions, and potential damage to other engine components.

5. How do I diagnose the P0103 code on a 2007 Nissan Pathfinder?

Start by inspecting the MAF sensor wiring and connectors for damage, check for air leaks in the intake system, and test the MAF sensor voltage using a multimeter.

6. How can I fix the P0103 code on a 2007 Nissan Pathfinder?

Repairs may include cleaning or replacing the MAF sensor, repairing damaged wiring, replacing a dirty air filter, or sealing any intake leaks.

7. How much does it cost to fix the P0103 code on a 2007 Nissan Pathfinder?

Repair costs can vary but typically range from $100 to $400, depending on whether the MAF sensor needs cleaning or replacement and if additional repairs are required.

8. Can a dirty air filter cause the P0103 code in a 2007 Nissan Pathfinder?

Yes, a clogged or dirty air filter can restrict airflow and cause the MAF sensor to send incorrect readings, potentially triggering the P0103 code.

9. Will resetting the Check Engine Light fix the P0103 code on a 2007 Nissan Pathfinder?

Resetting the light may clear the code temporarily, but the underlying issue must be addressed to prevent the code from returning.

10. How often should the MAF sensor be checked to avoid P0103 in a 2007 Nissan Pathfinder?

Itâ€™s a good practice to inspect the MAF sensor and air intake system during routine maintenance, typically every 30,000 to 50,000 miles or as specified in the owner's manual.