Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer thinks there's something wrong with the sensor that checks the air pressure inside the engine. It's like when you have a balloon and you're not sure if it's fully blown up or not.
The P1199 code is triggered when the engine control module (ECM) detects a discrepancy between the intake manifold pressure readings and the expected values from the differential pressure sensor.
The differential pressure sensor monitors the pressure difference between two points in the intake manifold. If the sensor's readings do not align with expected values, the ECM sets the P1199 code. This can affect engine performance and efficiency.
• Check Engine Light is on
• Poor engine performance
• Reduced fuel efficiency
• Faulty differential pressure sensor
• Wiring issues or connector problems
• Intake manifold leaks
Differential Pressure Sensor: A sensor that measures the pressure difference between two points.
Intake Manifold: A part of the engine that supplies the air/fuel mixture to the cylinders.
• Use an OBD-II scanner to confirm the code.
• Inspect the differential pressure sensor and its wiring.
• Check for leaks in the intake manifold.
• Replace the faulty differential pressure sensor.
• Repair or replace damaged wiring or connectors.
• Fix any leaks in the intake manifold.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $400
Moderate
• Volkswagen Golf
• Audi A4
• BMW 3 Series
• Regularly inspect and maintain the intake manifold.
• Ensure sensors are clean and functioning.
• Check wiring and connectors periodically.
Sensor Issue
• Do not ignore the Check Engine Light.
• Get the vehicle inspected by a professional if unsure.
• Regular maintenance can prevent such issues.
Check with the vehicle manufacturer for sensor-related warranty coverage.
This code has been associated with vehicles that have aging sensors or issues with intake manifold integrity.
Moderate – It should be addressed soon to avoid potential engine performance issues.
Driving with a malfunctioning sensor can lead to increased emissions and may not comply with local regulations.
• Engine at operating temperature
• Vehicle at idle
The differential pressure sensor is typically located on or near the intake manifold.
Q: Can I drive with a P1199 code?
A: It's possible to drive, but it's not recommended as it can affect engine performance and efficiency.
Q: How do I reset the Check Engine Light after fixing the issue?
A: Use an OBD-II scanner to clear the code after repairs are complete.
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