AutoCodes – Generic – C1085

C1085 Code - Vacuum Pressure Sensor High

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: C1085 indicates Vacuum Pressure Sensor High.
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 3,471

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 C1085 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 C1085 - Vacuum Pressure Sensor High - AutoCodes.com — C1085 Code - Vacuum Pressure Sensor High

What does this mean?

What are the Possible Causes of the DTC C1085?

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 C1085?

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 C1085 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 C1085 code?

Need more information on how to fix the C1085 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1085 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1085 Chrysler — Vacuum Pressure Sensor High
C1085 Dodge — Vacuum Pressure Sensor High
C1085 Jeep — Vacuum Pressure Sensor High

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 C1085 Code

1. What are the common symptoms of OBDII code C1085 (Vacuum Pressure Sensor High)?

The common symptoms of code C1085 include rough idling, decreased engine performance, and potential stalling.

2. What are the possible causes of OBDII code C1085?

Possible causes of code C1085 may include a faulty vacuum pressure sensor, a vacuum leak in the intake system, or a problem with the vacuum pressure sensor circuit.

3. How can I diagnose the issue related to OBDII code C1085?

Diagnosing code C1085 typically involves checking the vacuum pressure sensor for proper operation, inspecting the intake system for leaks, and testing the sensor circuit for any faults.

4. Can a vacuum pressure sensor high error cause other problems in the vehicle?

Yes, a vacuum pressure sensor high error can lead to issues such as poor fuel efficiency, increased emissions, and potential damage to other engine components if left unresolved.

5. Is it safe to continue driving with OBDII code C1085 present?

It is not recommended to continue driving with code C1085 present, as it can cause further damage to the engine and affect the overall performance of the vehicle.

6. How can I repair OBDII code C1085 (Vacuum Pressure Sensor High) myself?

Repairing code C1085 may involve replacing the faulty vacuum pressure sensor, repairing any vacuum leaks in the intake system, or fixing any issues in the sensor circuit. It is important to have the necessary tools and knowledge to perform these repairs.

7. Are there any preventive measures to avoid OBDII code C1085 in the future?

Regular maintenance of the intake system, including checking for vacuum leaks and ensuring the vacuum pressure sensor is functioning properly, can help prevent the occurrence of code C1085.

8. Can a simple reset of the OBDII system clear code C1085?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing code C1085 is not addressed, the code is likely to reappear.

9. How much does it typically cost to repair OBDII code C1085 at a professional auto repair shop?

The cost of repairing code C1085 at a professional auto repair shop can vary depending on the specific issue causing the code, the labor rates, and the cost of parts. It is recommended to obtain quotes from different shops for an accurate estimate.

10. Can code C1085 be triggered by other related OBDII codes?

Code C1085 can sometimes be triggered by other related codes, such as vacuum sensor circuit low or intake system leak codes, as they are all interconnected in the vehicle's engine management system.