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Engine-Codes – GMC – P1190 GMC

P1190 GMC Code - Engine Vacuum Leak

Quick Answer

The P1190 GMC code indicates that there is an engine vacuum leak in the vehicle. Common causes include Loose or damaged vacuum hoses, Cracked or damaged intake manifold gasket, Faulty vacuum pump. 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
P1190 GMC indicates Engine Vacuum Leak.
Common causes
Common causes include Loose or damaged vacuum hoses, Cracked or damaged intake manifold gasket, Faulty vacuum pump.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P1190 GMC Description

The P1190 GMC code indicates that there is an engine vacuum leak in the vehicle. A vacuum leak occurs when there is an unintended gap or hole in the system that allows air to enter where it should not. This can disrupt the balance of air and fuel mixture needed for proper combustion in the engine.

OBDII Code P1190 GMC - Engine Vacuum Leak
P1190 GMC Code - Engine Vacuum Leak

Common Causes of P1190 GMC

  1. Loose or damaged vacuum hoses
  2. Cracked or damaged intake manifold gasket
  3. Faulty vacuum pump
  4. Malfunctioning PCV valve
  5. Leaking brake booster

Symptoms of P1190 GMC

  1. Rough idling
  2. Stalling
  3. Hesitation or lack of power during acceleration
  4. Increased fuel consumption
  5. Engine misfires

How to Fix P1190 GMC

  1. Perform a visual inspection of the vacuum hoses and connections to identify any visible signs of damage or leaks.
  2. Use a smoke machine to pinpoint the location of the vacuum leak by introducing smoke into the system and looking for where it escapes.
  3. Replace any damaged or worn vacuum hoses or connections.
  4. Check and replace the intake manifold gasket if necessary.
  5. Test the system after repairs to ensure that the vacuum leak has been successfully addressed.

Cost to Fix P1190 GMC

The cost of repairing an engine vacuum leak can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the cost of repairing an engine vacuum leak can range from $100 to $500, including parts and labor. It's important to note that the actual cost may vary based on factors such as the make and model of the vehicle, the location of the repair shop, and the severity of the issue. Additionally, the diagnosis time and labor rates at different auto repair shops can also impact the overall cost of the repair.

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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.

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