AutoCodes – Chevrolet – P1189 Chevrolet

P1189 Chevrolet Code - Engine Oil Pressure Switch Fault

Quick Answer

The low oil pressure sensor is normally closed. Common causes include Faulty Engine Oil Pressure Switch, Engine Oil Pressure Switch harness is open or shorted, Engine Oil Pressure Switch 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: P1189 Chevrolet indicates Engine Oil Pressure Switch Fault.
Common causes: Common causes include Faulty Engine Oil Pressure Switch, Engine Oil Pressure Switch harness is open or shorted, Engine Oil Pressure Switch 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 48,324

How popular is this code, among other codes? Medium

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1189 Chevrolet Description

The low oil pressure sensor is normally closed. When oil pressure increases above 1 to 4.5 psi the switch contacts open. The Powertrain Control Module (PCM) supplies 12 volts to the oil pressure input circuit. With low oil pressure the 12 volts is pulled low to ground. This diagnostic tests for a open condition of the oil pressure switch circuit. If the engine has been off long enough for engine temperature to drop by 10Â°C, then a shorted (low oil pressure) condition of the circuit should be observed prior to engine running.

OBDII Code P1189 Chevrolet - Engine Oil Pressure Switch Fault - AutoCodes.com — P1189 Chevrolet Code - Engine Oil Pressure Switch Fault

What does this mean?

What are the Possible Causes of the DTC P1189 Chevrolet?

Faulty Engine Oil Pressure Switch
Engine Oil Pressure Switch harness is open or shorted
Engine Oil Pressure Switch circuit poor electrical connection

How to Fix the DTC P1189 Chevrolet?

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 P1189 Chevrolet 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 P1189 Chevrolet code?

Need more information on how to fix the P1189 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1189 Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 P1189 Chevrolet Code

1. What are the common symptoms of OBDII code P1189 (Chevrolet) related to the Engine Oil Pressure Switch Fault?

The common symptoms include illuminated Check Engine light, low oil pressure warning light, engine stalling, rough idling, and decreased fuel efficiency.

2. What are the possible causes of the Engine Oil Pressure Switch Fault (P1189) in a Chevrolet vehicle?

Possible causes may include a faulty oil pressure switch, low engine oil level, oil pressure sensor issues, wiring problems, or engine oil viscosity issues.

3. How can I diagnose the Engine Oil Pressure Switch Fault (P1189) in my Chevrolet vehicle?

Diagnosing involves using an OBDII scanner to retrieve the trouble code, inspecting the oil pressure switch and sensor, checking the engine oil level and quality, and testing the wiring for continuity.

4. Can I drive my Chevrolet with the OBDII code P1189 (Engine Oil Pressure Switch Fault) active?

It is not recommended to drive with this fault as it can lead to serious engine damage due to insufficient lubrication. Immediate attention and repair are advised.

5. What are some repair tips for fixing the Engine Oil Pressure Switch Fault (P1189) in a Chevrolet?

Repair tips include replacing the faulty oil pressure switch, ensuring the engine oil level and quality are correct, checking for any wiring issues, and resetting the trouble code with a scanner after repairs.

6. Will resetting the OBDII code P1189 (Chevrolet) make it go away permanently?

Resetting the code without addressing the underlying issue will not make it disappear permanently. The fault needs to be diagnosed and fixed to prevent the code from reoccurring.

7. How much does it typically cost to repair the Engine Oil Pressure Switch Fault (P1189) in a Chevrolet?

The cost of repair can vary depending on the exact cause of the fault, but it may range from $100 to $300 for parts and labor at a professional automotive repair shop.

8. Can a DIY enthusiast fix the OBDII code P1189 (Chevrolet) related to the Engine Oil Pressure Switch Fault?

While some DIYers may be able to replace the oil pressure switch themselves, diagnosing and repairing underlying issues may require advanced automotive knowledge and tools. Professional help is recommended if unsure.

9. Are there any safety precautions to consider when dealing with the Engine Oil Pressure Switch Fault (P1189) in a Chevrolet?

Ensure the engine is cool before working on it, wear appropriate safety gear, disconnect the battery before any electrical work, and follow proper procedures outlined in the vehicle's service manual.

10. How urgent is it to address the OBDII code P1189 (Chevrolet) indicating an Engine Oil Pressure Switch Fault?

It is crucial to address this issue promptly to prevent potential engine damage and costly repairs. Ignoring the fault can lead to serious consequences, so immediate attention is recommended.