AutoCodes – Subaru – P1110 Subaru

P1110 Subaru Code - Atmospheric Pressure Sensor Circuit Malfunction Low Input

Quick Answer

This sensor measures the atmospheric pressure that the vehicle is experiencing. Common causes include Intake System, Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted. 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: P1110 Subaru indicates Atmospheric Pressure Sensor Circuit Malfunction Low Input.
Common causes: Common causes include Intake System, Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted.
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 5,910

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 Jul 12, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1110 Subaru Description

This sensor measures the atmospheric pressure that the vehicle is experiencing. The Diagnostic Trouble Code (DTC) will set when the Engine Control Module (ECM) detects a low voltage signal from the atmospheric pressure sensor.

OBDII Code P1110 Subaru - Atmospheric Pressure Sensor Circuit Malfunction Low Input - AutoCodes.com — P1110 Subaru Code - Atmospheric Pressure Sensor Circuit Malfunction Low Input

What does this mean?

What are the Possible Causes of the DTC P1110 Subaru?

Intake System
Faulty Engine Control Module (ECM)
Engine Control Module harness is open or shorted
Engine Control Module circuit poor electrical connection

How to Fix the DTC P1110 Subaru?

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

The atmospheric pressure sensor is integrated into the Engine Control Module (ECM) and cannot be serviced separately. The Engine Control Module uses sensor inputs such as intake air pressure, intake air temperature and throttle position in order to calculate an atmospheric pressure reading.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1110 Subaru 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 P1110 Subaru code?

Need more information on how to fix the P1110 Subaru code? Get Access to Factory Service Manuals

Need Help with the 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 P1110 Subaru Code

1. What are common symptoms of an Atmospheric Pressure Sensor Circuit Malfunction (P1110) in a Subaru?

Symptoms may include poor engine performance, reduced fuel efficiency, stalling, rough idling, and even difficulty starting the vehicle.

2. What are the possible causes of the P1110 OBDII code in a Subaru?

Possible causes include a faulty atmospheric pressure sensor, damaged wiring or connectors in the sensor circuit, a vacuum leak, or issues with the engine control module.

3. How can I diagnose the P1110 code in my Subaru?

Diagnosis typically involves checking the sensor's wiring and connections, testing the sensor's functionality, inspecting for vacuum leaks, and using a scan tool to monitor sensor data.

4. Can I drive my Subaru with the P1110 code?

It is not recommended to drive your Subaru with the P1110 code, as it can lead to further damage and potential safety issues. It's best to address the underlying problem promptly.

5. How can I repair the Atmospheric Pressure Sensor Circuit Malfunction in my Subaru?

Repairing the issue may involve replacing the atmospheric pressure sensor, repairing damaged wiring or connectors, fixing any vacuum leaks, or reprogramming the engine control module.

6. Is it possible to reset the P1110 code in my Subaru without fixing the issue?

Resetting the code without addressing the underlying problem will only temporarily clear the check engine light. The code is likely to return until the root cause is fixed.

7. Are there any DIY repair tips for the P1110 code in a Subaru?

DIY enthusiasts can start by inspecting the sensor's wiring and connectors for damage, checking for vacuum leaks, and testing the sensor's functionality using a multimeter.

8. How much does it typically cost to repair the P1110 code in a Subaru?

The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor if a sensor replacement or wiring repair is needed.

9. Can a mechanic help me with diagnosing and repairing the P1110 code in my Subaru?

Yes, a qualified mechanic with experience in Subaru vehicles can diagnose the issue accurately using specialized tools and repair the problem efficiently to resolve the P1110 code.

10. How important is it to fix the Atmospheric Pressure Sensor Circuit Malfunction in a Subaru?

It is crucial to address the P1110 code promptly to ensure optimal engine performance, fuel efficiency, and overall vehicle reliability. Ignoring the issue can lead to more severe problems over time.