AutoCodes – Nissan – P0102 2004 Nissan Altima Sedan

P0102 2004 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 2004 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 5,011

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 2004 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 2004 Nissan Altima Sedan - Mass or Volume Air Flow Circuit Low Input - AutoCodes.com — P0102 2004 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 2004 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 2004 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 P0102 2004 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 2004 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P0102 in a 2004 Nissan Altima Sedan?

The common symptoms of code P0102 include a decrease in engine performance, rough idling, stalling, and poor fuel economy.

2. What does the OBDII code P0102 for a 2004 Nissan Altima Sedan indicate?

Code P0102 indicates that there is a low input signal coming from the mass or volume air flow sensor circuit.

3. What are the possible causes of OBDII code P0102 in a 2004 Nissan Altima Sedan?

Possible causes of code P0102 include a dirty or faulty mass air flow sensor, a vacuum leak in the intake system, a clogged air filter, or issues with the wiring or connectors.

4. How can I diagnose the OBDII code P0102 in my 2004 Nissan Altima Sedan?

You can diagnose code P0102 by visually inspecting the air intake system, checking the mass air flow sensor for dirt or damage, testing the sensor with a multimeter, and scanning the vehicle's computer for any related trouble codes.

5. What are some repair tips for fixing OBDII code P0102 in a 2004 Nissan Altima Sedan?

Try cleaning the mass air flow sensor with electronic cleaner, replacing the air filter, checking and repairing any vacuum leaks, and ensuring all wiring and connectors related to the sensor are in good condition.

6. Can driving with OBDII code P0102 in a 2004 Nissan Altima Sedan cause further damage?

Continuing to drive with code P0102 can potentially lead to decreased engine performance, increased fuel consumption, and damage to other engine components over time.

7. Will resetting the OBDII code P0102 in a 2004 Nissan Altima Sedan make it go away permanently?

Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing code P0102 is not addressed, the code is likely to reappear.

8. How much does it typically cost to repair OBDII code P0102 in a 2004 Nissan Altima Sedan?

The cost of repairing code P0102 can vary depending on the exact cause of the issue, but it may range from $100 to $400 for parts and labor.

9. Can I drive my 2004 Nissan Altima Sedan with OBDII code P0102?

It is not recommended to drive your vehicle with code P0102 for an extended period, as it can lead to poor engine performance and potential damage to other components.

10. How urgent is it to address OBDII code P0102 in a 2004 Nissan Altima Sedan?

It is advisable to address code P0102 as soon as possible to prevent further issues with engine performance, fuel efficiency, and potential damage to the vehicle.