Air Filter Differential Pressure Sensor Circuit
The air filter differential pressure sensor is reading outside normal parameters.
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What it means (plain English)
The sensor that checks how clogged your air filter is is sending a warning because it thinks the filter might be too dirty or there's an issue with the sensor itself.
What the computer is actually seeing
The engine control unit (ECU) sees the voltage signal from the differential pressure sensor falling outside the expected range, indicating either a clogged air filter or a malfunctioning sensor.
What a healthy reading looks like
Normal voltage readings should be between 0.5 to 4.5 volts depending on filter condition; a reading below 0.3V or above 4.7V indicates a problem.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Inspect the wiring and connectors to the differential pressure sensor for damage or corrosion. Repair as necessary. Decision Point: Are the connections solid and undamaged?
- 2Check the air filter for excessive dirt and contamination. Replace if necessary. Decision Point: Is the air filter dirty enough to restrict airflow?
- 3With the air filter replaced, monitor the voltage from the differential pressure sensor. Should be between 0.5 to 4.5 volts under normal operation. Decision Point: Are the sensor readings within spec?
- 4If the sensor readings are still off, replace the differential pressure sensor and retest. Decision Point: Is the problem resolved after the sensor replacement?
Common causes
- Clogged air filter
- Faulty differential pressure sensor
- Wiring issues or connector faults
Typical repair cost
$$
Related codes
Frequently asked questions
Can I still drive the vehicle if this code is present?
Yes, the vehicle is drivable, but it's best to fix it to avoid performance issues.
Will this code come back after I fix it?
If the issue is resolved, it shouldn't return. Keep an eye on it after your repair.
Can this code be related to other performance issues?
Yes, if the air filter is clogged, it can affect engine performance and fuel economy.
Working a real vehicle right now?
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