AutoCodes – Nissan – P1104 2002 Nissan Sentra

P1104 2002 Nissan Sentra Code - MAP Sensor Low Voltage

Quick Answer

The Manifold Absolute Pressure (MAP) sensor provides instantaneous manifold pressure information to the engine's Engine Control Module (ECM). Common causes include Faulty Manifold Absolute Pressure (MAP), Manifold Absolute Pressure (MAP) harness is open or shorted, Manifold Absolute Pressure (MAP) circuit poor electrical connection. 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: P1104 2002 Nissan Sentra indicates MAP Sensor Low Voltage.
Common causes: Common causes include Faulty Manifold Absolute Pressure (MAP), Manifold Absolute Pressure (MAP) harness is open or shorted, Manifold Absolute Pressure (MAP) circuit poor electrical connection.
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 1,705

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 Apr 14, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1104 2002 Nissan Sentra Description

The Manifold Absolute Pressure (MAP) sensor provides instantaneous manifold pressure information to the engine's Engine Control Module (ECM). The data is used to calculate air density and determine the engine's air mass flow rate, which in turn determines the required fuel metering for optimum combustion. A fuel-injected engine may alternately use a Mass Air Flow (MAF) sensor to detect the intake airflow. A typical configuration employs one or the other, but seldom both.The MAP/BARO Switch solenoid valve switches it's air flow passage according to the voltage signal sent from the ECM.

OBDII Code P1104 2002 Nissan Sentra - MAP Sensor Low Voltage - AutoCodes.com — P1104 2002 Nissan Sentra Code - MAP Sensor Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1104 2002 Nissan Sentra?

Faulty Manifold Absolute Pressure (MAP)
Manifold Absolute Pressure (MAP) harness is open or shorted
Manifold Absolute Pressure (MAP) circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P1104 2002 Nissan Sentra?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1104 2002 Nissan Sentra 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.

Need more information about the P1104 2002 Nissan Sentra code?

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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 P1104 2002 Nissan Sentra Code

1. What does the OBDII code P1104 mean on a 2002 Nissan Sentra?

P1104 indicates a "MAP Sensor Low Voltage" issue, meaning the manifold absolute pressure (MAP) sensor is sending a voltage signal to the engine control module (ECM) that is lower than expected.

2. What are the common symptoms of the P1104 code on a 2002 Nissan Sentra?

Symptoms may include poor engine performance, rough idle, decreased fuel efficiency, difficulty starting, and the check engine light being illuminated.

3. What causes the P1104 MAP Sensor Low Voltage code?

Common causes include a faulty MAP sensor, damaged wiring or connectors, vacuum leaks, or a malfunctioning ECM.

4. Can a dirty MAP sensor trigger the P1104 code?

Yes, a dirty or clogged MAP sensor can result in incorrect readings and low voltage output, which may trigger the P1104 code.

5. How do I fix the P1104 code on my 2002 Nissan Sentra?

Start by inspecting the MAP sensor and its wiring for damage. Clean or replace the MAP sensor if necessary. Check for vacuum leaks and ensure all connections are secure.

6. Can driving with the P1104 code cause further damage?

Driving with this code may lead to poor performance and potential damage to the engine or catalytic converter if unaddressed for an extended period.

7. How do I test the MAP sensor on my 2002 Nissan Sentra?

Use a multimeter to measure the voltage output of the MAP sensor while the engine is running. Compare the readings to the manufacturerâ€™s specifications.

8. Is the P1104 code specific to the MAP sensor?

While the code points to low voltage from the MAP sensor, it could also be caused by wiring issues, vacuum leaks, or a problem with the ECM.

9. Do I need to replace the MAP sensor to clear the P1104 code?

Not necessarily. First, inspect and clean the sensor, check wiring and connections, and address any vacuum leaks. Replace the sensor only if itâ€™s confirmed to be faulty.

10. Will clearing the P1104 code with a scan tool fix the problem?

Clearing the code will reset the check engine light, but if the underlying issue is not resolved, the code will likely return.