Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is saying that a sensor in the engine is detecting too much pressure in a part where air goes in. It's like blowing too hard into a balloon and it's getting too tight.
The engine control module (ECM) has detected that the differential pressure sensor is reporting a higher than expected pressure in the intake manifold.
The P1105 code indicates that the differential pressure sensor, which monitors the pressure difference across the intake manifold, is reading a pressure that is too high. This can affect the air-fuel mixture and engine performance.
• Check Engine Light on
• Poor engine performance
• Rough idling
• Faulty differential pressure sensor
• Clogged or restricted intake manifold
• Vacuum leaks
Differential Pressure Sensor: A sensor that measures the difference in pressure between two points.
Intake Manifold: A part of the engine that distributes air to the cylinders.
• Use an OBD-II scanner to confirm the code.
• Inspect the intake manifold for blockages.
• Test the differential pressure sensor with a multimeter.
• Replace the differential pressure sensor if faulty.
• Clean or replace the intake manifold if clogged.
• Repair any vacuum leaks.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $400
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regularly clean the intake manifold.
• Inspect vacuum lines for leaks.
• Replace air filters as recommended.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if unsure.
• Regular maintenance can prevent such issues.
Check with the vehicle manufacturer for specific warranty coverage on sensors.
This code has been associated with sensor failures and intake manifold issues in various models over the years.
Moderate – It should be addressed soon to prevent further 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 near the intake manifold.
Q: Can I drive with a P1105 code?
A: It's not recommended as it can lead to poor engine performance and increased emissions.
Q: How do I reset the P1105 code?
A: After fixing the issue, use an OBD-II scanner to clear the code.
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