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 a sensor in your car's engine is reading too high for the air pressure in part of the engine. It's like if a balloon was filled with too much air.
The differential pressure sensor measures the pressure difference in the intake manifold to ensure proper air flow and fuel mixture. A high circuit reading indicates a potential issue with the sensor or the wiring.
P1154 indicates that the differential pressure sensor for the intake manifold on Bank 2 is reporting a higher than expected voltage signal to the engine control module (ECM). This could be due to a sensor fault, wiring issue, or an actual increase in pressure.
• Check Engine Light illuminated
• Reduced engine performance
• Poor fuel economy
• Faulty differential pressure sensor
• Wiring issues such as shorts or open circuits
• Vacuum leaks in the intake manifold
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 wiring and connectors for damage or corrosion.
• Test the differential pressure sensor for proper function.
• Replace the differential pressure sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Seal any vacuum leaks in the intake manifold.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Toyota Camry
• Lexus RX350
• Chevrolet Silverado
• Regularly inspect and maintain intake manifold components.
• Ensure all engine sensors are functioning properly.
• Perform routine vehicle diagnostics.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if unsure.
• Regular maintenance can prevent sensor issues.
Check with your vehicle manufacturer for specific warranty coverage on sensors.
This code has been associated with faulty sensors or wiring issues in older vehicle models.
Moderate – Should be addressed soon to avoid potential engine performance issues.
Driving with a malfunctioning sensor can lead to increased emissions and potential safety hazards.
• Engine running
• Vehicle at operating temperature
The differential pressure sensor is typically located on the intake manifold of the engine.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to poor engine performance and increased fuel consumption.
Q: Can I drive with a P1154 code?
A: While the car may still be drivable, it's best to address the issue to prevent further engine problems.
High-End · Full-system diagnostics
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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Fitment Required · Vehicle-fitment part
Relevant for airflow, fuel-trim, and intake-metering faults after confirming the sensor is actually at fault.
Airflow and fuel-trim codes can involve the mass air flow sensor after proper diagnosis.
Verify the sensor design and fitment for your exact vehicle.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.