AutoCodes – Nissan – P0103 2002 Nissan Altima Sedan

P0103 2002 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 2002 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 5,206

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 2002 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 2002 Nissan Altima Sedan - Mass Air Flow Sensor Circuit High Input - AutoCodes.com — P0103 2002 Nissan Altima Sedan Code - Mass Air Flow Sensor Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0103 2002 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 2002 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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0103 2002 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 2002 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P0103 in a 2002 Nissan Altima Sedan?

- Common symptoms include poor engine performance, rough idle, stalling, decreased fuel efficiency, and the Check Engine light illuminated on the dashboard.

2. What does the OBDII code P0103 on a 2002 Nissan Altima Sedan indicate?

- OBDII code P0103 indicates a high input signal from the Mass Air Flow (MAF) sensor circuit in the vehicle.

3. What are the potential causes of OBDII code P0103 in a 2002 Nissan Altima Sedan?

- The potential causes of P0103 include a faulty MAF sensor, damaged wiring or connectors in the MAF sensor circuit, a dirty or contaminated MAF sensor, or a vacuum leak in the intake system.

4. How can I diagnose the OBDII code P0103 on my 2002 Nissan Altima Sedan?

- Diagnose OBDII code P0103 by visually inspecting the MAF sensor and its wiring, testing the MAF sensor using a multimeter, checking for vacuum leaks, and scanning the vehicle's computer for additional error codes.

5. Can I continue to drive my 2002 Nissan Altima Sedan with the OBDII code P0103?

- It is not recommended to continue driving the vehicle with the P0103 code as it can lead to further engine damage and decreased fuel efficiency.

6. How can I repair OBDII code P0103 on my 2002 Nissan Altima Sedan?

- Repair the P0103 code by cleaning or replacing the MAF sensor, repairing any damaged wiring or connectors, fixing any vacuum leaks, and clearing the error code using an OBDII scanner.

7. Will resetting the Check Engine light fix the OBDII code P0103 on my 2002 Nissan Altima Sedan?

- Resetting the Check Engine light may temporarily turn off the warning light, but it will not fix the underlying issue causing the P0103 code. It is important to diagnose and repair the problem to prevent further issues.

8. How much does it cost to repair OBDII code P0103 on a 2002 Nissan Altima Sedan?

- The cost of repairing P0103 can vary depending on the cause of the issue. Costs may include the price of a new MAF sensor, wiring repairs, or labor charges if taken to a mechanic.

9. Can a DIY enthusiast fix OBDII code P0103 on a 2002 Nissan Altima Sedan?

- A DIY enthusiast with automotive repair experience can attempt to fix the P0103 code by following diagnostic procedures, replacing the MAF sensor, checking wiring, and addressing vacuum leaks.

10. How often does OBDII code P0103 occur in a 2002 Nissan Altima Sedan?

- OBDII code P0103 can occur in a 2002 Nissan Altima Sedan due to various factors, including sensor aging, environmental conditions, and maintenance history.