AutoCodes – Infiniti – P0103 2003 Infiniti G35

P0103 2003 Infiniti G35 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 Infiniti G35 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 7,986

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 Infiniti G35 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 Infiniti G35 - Mass Air Flow Sensor Circuit High Input - AutoCodes.com — P0103 2003 Infiniti G35 Code - Mass Air Flow Sensor Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0103 2003 Infiniti G35?

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 Infiniti G35?

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 Infiniti G35 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.

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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 Infiniti G35 Code

1. What are the common symptoms of OBDII code P0103 in a 2003 Infiniti G35?

- Common symptoms include engine stalling, rough idling, decreased fuel efficiency, and potential issues with acceleration.

2. What does the OBDII code P0103 on a 2003 Infiniti G35 indicate?

- OBDII code P0103 indicates a high input in the mass air flow (MAF) sensor circuit of the vehicle.

3. What are the possible causes of OBDII code P0103 in a 2003 Infiniti G35?

- Potential causes of P0103 include a faulty MAF sensor, damaged wiring or connectors in the MAF sensor circuit, or a dirty or contaminated MAF sensor.

4. How can I diagnose the OBDII code P0103 issue in my 2003 Infiniti G35?

- You can diagnose the P0103 issue by inspecting the MAF sensor and its wiring for any damage, testing the sensor's voltage output, and checking for any air leaks in the intake system.

5. Can a dirty air filter cause OBDII code P0103 in a 2003 Infiniti G35?

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

6. What are some repair tips for addressing OBDII code P0103 in a 2003 Infiniti G35?

- Repair tips include cleaning or replacing the MAF sensor, checking and repairing any damaged wiring or connectors, and ensuring the air filter is clean and properly installed.

7. Is it safe to continue driving my 2003 Infiniti G35 with OBDII code P0103?

- It is not recommended to drive the vehicle with code P0103 as it can lead to engine performance issues and potentially cause further damage if left unresolved.

8. Will resetting the OBDII code P0103 in my 2003 Infiniti G35 make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue causing P0103 is not addressed, the code is likely to reappear.

9. How much does it typically cost to repair OBDII code P0103 in a 2003 Infiniti G35?

- The cost of repairing P0103 can vary depending on the specific cause, but it may range from $100 to $500, including parts and labor.

10. Can I replace the MAF sensor in my 2003 Infiniti G35 myself to fix OBDII code P0103?

- While it is possible to replace the MAF sensor yourself, it is recommended to have the proper tools and knowledge to ensure it is done correctly to address code P0103 effectively.