AutoCodes – Generic – C1084

C1084 Code - Vacuum Pressure Sensor Low

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Vacuum Pressure Sensor. Common causes include Faulty Vacuum Pressure Sensor, Vacuum Pressure Sensor harness is open or shorted, Vacuum Pressure Sensor 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: C1084 indicates Vacuum Pressure Sensor Low.
Common causes: Common causes include Faulty Vacuum Pressure Sensor, Vacuum Pressure Sensor harness is open or shorted, Vacuum Pressure Sensor 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 1,173

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 10, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1084 Description

The Anti-Lock Brake System (ABS) Module monitors the Vacuum Pressure Sensor. The ABS Module sets the OBDII code when the Vacuum Pressure Sensor is not to factory specifications.

OBDII Code C1084 - Vacuum Pressure Sensor Low - AutoCodes.com — C1084 Code - Vacuum Pressure Sensor Low

What does this mean?

What are the Possible Causes of the DTC C1084?

Faulty Vacuum Pressure Sensor
Vacuum Pressure Sensor harness is open or shorted
Vacuum Pressure Sensor circuit poor electrical connection
Faulty Anti-Lock Brake System (ABS) Module

How to Fix the DTC C1084?

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 C1084 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 C1084 code?

Need more information on how to fix the C1084 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1084 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1084 Chrysler — Vacuum Pressure Sensor Low
C1084 Dodge — Vacuum Pressure Sensor Low
C1084 Jeep — Vacuum Pressure Sensor Low

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 C1084 Code

1. What are the common symptoms of OBDII code C1084 Vacuum Pressure Sensor Low?

- Common symptoms include reduced engine performance, poor fuel efficiency, and potential stalling or hesitation while driving.

2. What can cause the OBDII code C1084 Vacuum Pressure Sensor Low?

- Possible causes include a faulty vacuum pressure sensor, vacuum leaks in the system, or damaged vacuum hoses.

3. How can I diagnose the OBDII code C1084 Vacuum Pressure Sensor Low?

- Diagnosing this code involves checking the vacuum pressure sensor for proper operation, inspecting vacuum hoses for leaks or damage, and using a scan tool to monitor sensor data.

4. Can a dirty air filter trigger the OBDII code C1084 Vacuum Pressure Sensor Low?

- Yes, a dirty air filter can restrict airflow and lead to incorrect readings by the vacuum pressure sensor, potentially triggering the code.

5. What repairs are typically needed for OBDII code C1084 Vacuum Pressure Sensor Low?

- Repairs may involve replacing the vacuum pressure sensor, repairing or replacing damaged vacuum hoses, and ensuring proper sealing of the vacuum system.

6. Is it safe to continue driving with the OBDII code C1084 Vacuum Pressure Sensor Low?

- It is not recommended to continue driving with this code, as it can lead to further engine damage or performance issues. It's best to address the underlying problem promptly.

7. Can a DIY enthusiast repair the OBDII code C1084 Vacuum Pressure Sensor Low?

- Depending on the skill level and tools available, some DIY enthusiasts may be able to address this code by replacing the vacuum pressure sensor or fixing minor vacuum system leaks.

8. How can I prevent the OBDII code C1084 Vacuum Pressure Sensor Low from recurring?

- Regular maintenance, such as checking and replacing air filters, inspecting vacuum hoses for wear, and addressing any issues promptly, can help prevent this code from reappearing.

9. Will resetting the OBDII system clear the C1084 Vacuum Pressure Sensor Low code?

- Resetting the system may temporarily clear the code, but it's essential to diagnose and address the underlying issue to prevent it from coming back.

10. Does the OBDII code C1084 Vacuum Pressure Sensor Low affect vehicle safety?

- While the code itself may not directly impact safety, addressing the underlying issue is crucial to maintaining optimal engine performance and preventing potential drivability issues.