AutoCodes – Nissan – P0103 2005 Nissan Altima Sedan

P0103 2005 Nissan Altima Sedan 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 2005 Nissan Altima Sedan 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 4,671

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 2005 Nissan Altima Sedan 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 2005 Nissan Altima Sedan - Mass Air Flow Sensor Circuit High Input - AutoCodes.com — P0103 2005 Nissan Altima Sedan Code - Mass Air Flow Sensor Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0103 2005 Nissan Altima Sedan?

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 2005 Nissan Altima Sedan?

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.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0103 2005 Nissan Altima Sedan 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 2005 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P0103 in a 2005 Nissan Altima Sedan?

The common symptoms of code P0103 include rough idling, engine stalling, decreased fuel efficiency, and illuminated Check Engine Light.

2. What does the OBDII code P0103 mean for a 2005 Nissan Altima Sedan?

Code P0103 indicates a high input signal from the mass airflow sensor (MAF) circuit in the 2005 Nissan Altima Sedan.

3. What are the possible causes of OBDII code P0103 in a 2005 Nissan Altima Sedan?

Potential causes of code P0103 in a 2005 Nissan Altima Sedan include a faulty MAF sensor, damaged wiring or connectors in the MAF circuit, or a dirty or clogged air filter.

4. How can I diagnose the OBDII code P0103 in a 2005 Nissan Altima Sedan?

To diagnose code P0103, you can start by inspecting the MAF sensor, checking the wiring and connectors for any damage, and ensuring the air filter is clean. Using an OBDII scanner to read live data can also help pinpoint the issue.

5. Can a dirty air filter trigger OBDII code P0103 in a 2005 Nissan Altima Sedan?

Yes, a dirty or clogged air filter can disrupt the airflow and cause incorrect readings by the MAF sensor, potentially triggering code P0103 in a 2005 Nissan Altima Sedan.

6. How can I repair OBDII code P0103 in a 2005 Nissan Altima Sedan?

Repairing code P0103 may involve cleaning or replacing the MAF sensor, repairing damaged wiring or connectors, and ensuring the air filter is clean and properly installed.

7. Is it safe to continue driving a 2005 Nissan Altima Sedan with OBDII code P0103?

It is not recommended to drive a vehicle with an unresolved P0103 code, as it can lead to poor engine performance, reduced fuel efficiency, and potential further damage to engine components.

8. Can a DIY enthusiast fix OBDII code P0103 in a 2005 Nissan Altima Sedan?

Depending on the root cause, DIY enthusiasts with automotive repair knowledge and tools may be able to address code P0103 by cleaning the MAF sensor, checking wiring, and replacing the air filter.

9. How much does it typically cost to repair OBDII code P0103 in a 2005 Nissan Altima Sedan?

The cost of repairing code P0103 in a 2005 Nissan Altima Sedan can vary based on the specific cause and whether you choose to address it yourself or seek professional assistance. Costs may range from inexpensive for cleaning the MAF sensor to more significant for sensor replacement or wiring repairs.

10. Can weather conditions affect OBDII code P0103 in a 2005 Nissan Altima Sedan?

Extreme weather conditions, such as extremely cold or hot temperatures, can sometimes impact the MAF sensor's performance and potentially contribute to triggering code P0103 in a 2005 Nissan Altima Sedan.