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Home/DTC Codes/Pontiac/Sunfire/1995-2005 2.2L I4/P1190
P1190

Engine Vacuum Leak

1995-2005 Pontiac Sunfire 2.2L I4

Moderate SeverityPowertrain

Description

The PCM detected an engine vacuum leak based on fuel trim adaptation data. The system has determined that unmetered air is entering the engine.

Symptoms

  • Check Engine Light
  • Rough idle
  • Lean running condition
  • Poor fuel economy
  • Hissing noise from engine

Common Causes

  • Cracked or disconnected vacuum hose
  • Intake manifold gasket leak
  • Brake booster vacuum leak
  • PCV valve or hose leak
  • Throttle body gasket leak

Diagnostic Steps

  1. Perform smoke test on intake system
  2. Inspect all vacuum hoses and connections
  3. Check intake manifold gaskets
  4. Test brake booster vacuum hose
  5. Inspect PCV system

Repair Notes

Perform smoke test to locate leak. Repair or replace damaged hoses, gaskets, or fittings.

Related Codes

P0171System Too Lean Bank 1P0174System Too Lean Bank 2P1101MAF Sensor Out of Self-Test RangeP1101MAF Sensor Out of Self-Test RangeP1101MAF Sensor Out of Self-Test RangeP1101Intake Airflow System PerformanceP1101Intake Airflow System PerformanceP1101Intake Airflow System PerformanceP1101Intake Airflow System PerformanceP1101Intake Airflow System PerformanceP1101Intake Airflow System PerformanceP1101Intake Airflow System PerformanceP1101Intake Airflow System PerformanceP1101Neutral Position Switch Circuit MalfunctionP1101MAF Sensor Out of Self-Test Range

Other Powertrain Codes

P1190 on Other Vehicles

Pontiac Aztek

2001-2005 3.4L V6

Pontiac Bonneville

1990-1999 3.8L V6

Pontiac Bonneville

2000-2005 3.8L V6

Pontiac Bonneville GXP

2000-2005 4.6L V8

Pontiac Bonneville GXP

2000-2005 4.6L V8 Northstar

Pontiac Bonneville SSEi

1992-1999 3.8L Supercharged V6

Pontiac Bonneville SSEi

1992-1999 3.8L V6 Supercharged

Pontiac Firebird

1993-1997 3.4L V6

Common Questions

What does code P1190 mean on a 1995-2005 Pontiac Sunfire?

P1190 stands for "Engine Vacuum Leak". The PCM detected an engine vacuum leak based on fuel trim adaptation data. The system has determined that unmetered air is entering the engine.

What are the symptoms of P1190 on a Pontiac Sunfire?

Common symptoms of P1190 include: Check Engine Light, Rough idle, Lean running condition, Poor fuel economy, Hissing noise from engine.

What causes P1190 on a 1995-2005 Pontiac Sunfire?

Common causes of P1190 include: Cracked or disconnected vacuum hose, Intake manifold gasket leak, Brake booster vacuum leak, PCV valve or hose leak, Throttle body gasket leak.

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