AutoCodes – Generic – P1104

P1104 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 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 25,935

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 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 - MAP Sensor Low Voltage - AutoCodes.com — P1104 Code - MAP Sensor Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1104?

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?

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 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 code?

Need more information on how to fix the P1104 code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Makes

P1104 Audi — HO2S12 Sensor Circuit Voltage Too Low Air Leak
P1104 BMW — Differential Pressure Sensor Intake Manifold Plausibility
P1104 Hyundai — Mass Air Flow Ground Malfunction
P1104 Infiniti — MAP Sensor Low Voltage
P1104 Jaguar — Mass Air Flow Ground Malfunction
P1104 MINI — Differential Pressure Sensor Intake Manifold Plausibility
P1104 Mitsubishi — Turbocharger Wastegate Solenoid
P1104 Nissan — MAP Sensor Low Voltage
P1104 Subaru — Engine Torque Control Signal Circuit Malfunction
P1104 Volkswagen — HO2S12 Sensor Circuit Voltage Too Low Air Leak

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 Code

1. What are the common symptoms of OBDII code P1104 (MAP Sensor Low Voltage)?

- Common symptoms include engine hesitation, rough idle, poor acceleration, and potentially stalling.

2. What are the typical causes of OBDII code P1104?

- The code P1104 is usually triggered by a faulty MAP (Manifold Absolute Pressure) sensor, damaged wiring or connectors, or a problem with the sensor's power supply.

3. How can I diagnose the cause of OBDII code P1104?

- To diagnose the issue, you can visually inspect the MAP sensor and its wiring, check for any loose connections, perform a voltage test on the sensor, and use a scan tool to gather more data.

4. Can a dirty or clogged MAP sensor cause code P1104?

- Yes, a dirty or clogged MAP sensor can lead to incorrect voltage readings and trigger code P1104. It is recommended to clean or replace the sensor if this is the case.

5. What are some repair tips for fixing OBDII code P1104?

- Repair tips include checking and repairing any damaged wiring or connectors, replacing the MAP sensor if faulty, ensuring the sensor is receiving proper voltage, and clearing the code to see if it returns.

6. Is it safe to continue driving with OBDII code P1104 present?

- It is not recommended to drive with code P1104 active, as it can cause drivability issues and potentially lead to further damage if left unaddressed.

7. Can a DIY enthusiast fix OBDII code P1104 at home?

- Depending on the root cause, DIY enthusiasts with proper tools and knowledge may be able to fix code P1104 by replacing the MAP sensor, checking wiring connections, and clearing the code.

8. Will resetting the check engine light resolve OBDII code P1104?

- Resetting the check engine light may temporarily clear the code, but it is crucial to diagnose and address the underlying issue causing code P1104 to prevent it from reoccurring.

9. How much does it typically cost to repair OBDII code P1104 at a mechanic or dealership?

- The cost of repairing code P1104 can vary depending on the cause and location, but it may range from $100 to $300 for parts and labor at a mechanic or dealership.

10. Can extreme weather conditions affect the MAP sensor and trigger code P1104?

- Yes, extreme weather conditions such as extreme cold or heat can impact the performance of the MAP sensor, potentially leading to low voltage readings and triggering code P1104.