AutoCodes – Nissan – P0102 2012 Nissan Altima Sedan

P0102 2012 Nissan Altima Sedan Code - Mass or Volume Air Flow Circuit Low 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: P0102 2012 Nissan Altima Sedan indicates Mass or Volume Air Flow Circuit Low 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 7,247

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 P0102 2012 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 less than the factory specifications.

OBDII Code P0102 2012 Nissan Altima Sedan - Mass or Volume Air Flow Circuit Low Input - AutoCodes.com — P0102 2012 Nissan Altima Sedan Code - Mass or Volume Air Flow Circuit Low Input

What does this mean?

What are the Possible Causes of the DTC P0102 2012 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 P0102 2012 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 P0102 2012 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 P0102 2012 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P0102 on a 2012 Nissan Altima Sedan?

The common symptoms of code P0102 include poor acceleration, rough idling, stalling, decreased fuel efficiency, and the Check Engine light illuminating on the dashboard.

2. What does the OBDII code P0102 indicate on a 2012 Nissan Altima Sedan?

Code P0102 indicates a low input signal from the Mass Air Flow (MAF) sensor circuit in the 2012 Nissan Altima Sedan, affecting the engine's air-fuel mixture.

3. What are the possible causes of OBDII code P0102 on a 2012 Nissan Altima Sedan?

Possible causes of code P0102 in a 2012 Nissan Altima Sedan include a faulty MAF sensor, damaged wiring or connectors in the MAF circuit, a dirty or clogged air filter, or a vacuum leak.

4. How can I diagnose the OBDII code P0102 on my 2012 Nissan Altima Sedan?

To diagnose code P0102, you can start by visually inspecting the MAF sensor and its wiring, checking the air filter, performing a voltage test on the MAF sensor, and scanning for any other related trouble codes.

5. Can a dirty air filter cause OBDII code P0102 on a 2012 Nissan Altima Sedan?

Yes, a dirty or clogged air filter can disrupt the airflow to the MAF sensor, leading to incorrect readings and triggering code P0102 in a 2012 Nissan Altima Sedan.

6. Is it safe to continue driving with OBDII code P0102 on a 2012 Nissan Altima Sedan?

While the vehicle may still be operational with code P0102, it is not recommended to drive for an extended period as it can cause further damage to the engine or emissions system. It is advised to address the issue promptly.

7. How can I repair OBDII code P0102 on my 2012 Nissan Altima Sedan?

Repairing code P0102 may involve cleaning or replacing the MAF sensor, repairing any damaged wiring or connectors, replacing the air filter, fixing any vacuum leaks, and clearing the trouble codes from the vehicle's computer.

8. Can I reset the Check Engine light after fixing OBDII code P0102 on my 2012 Nissan Altima Sedan?

Yes, after fixing the underlying issue causing code P0102, you can reset the Check Engine light using an OBDII scanner or by disconnecting the car's battery for a few minutes.

9. How much does it typically cost to repair OBDII code P0102 on a 2012 Nissan Altima Sedan?

The cost of repairing code P0102 can vary depending on the specific cause of the issue. It may range from around $50 for a DIY air filter replacement to a few hundred dollars for a professional MAF sensor replacement.

10. Will OBDII code P0102 prevent my 2012 Nissan Altima Sedan from passing an emissions test?

Yes, code P0102 can prevent your 2012 Nissan Altima Sedan from passing an emissions test as it indicates an issue with the air-fuel mixture, which can lead to increased emissions. It is recommended to address the problem before attempting an emissions test.