Inlet Air Pressure Sensor Rate of Change
Indicates a problem with the Inlet Air Pressure sensor's readings.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
This code means the Inlet Air Pressure sensor is showing readings that change too fast or erratically, which can mess up engine performance.
What the computer is actually seeing
The ECM sees rapid fluctuations in the signal voltage from the Inlet Air Pressure sensor. Ideally, values should change smoothly and within calculated limits.
What a healthy reading looks like
Normal inlet air pressure values range between 5 to 30 psi under various engine loads.
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.
- 11. Inspect the wiring and connectors for the Inlet Air Pressure sensor. Look for frays, corrosion, or disconnections. Decision: If damage is found, repair or replace wiring and retest.
- 22. Check the Inlet Air Pressure sensor voltage with a multimeter. Key voltage should be between 0.5V (low pressure) and 4.5V (high pressure). Decision: If values are out of this range, replace the sensor.
- 33. Inspect the intake system for leaks, including hoses and any mounting points. Decision: If a leak is found, repair the intake system and retest for the code.
- 44. Conduct a visual inspection of the physical condition of the Inlet Air Pressure sensor. Look for signs of damage or excessive dirt. Decision: Replace if physical damage is found.
Common causes
- Faulty Inlet Air Pressure sensor
- Wiring issues or corroded connectors in the sensor circuit
- Excessive vibration or physical damage to the sensor
- Vacuum leak or restriction in the intake system
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
No, it can lead to poor engine performance and increased emissions. Fix it as soon as possible.
Will the code come back after clearing it?
Yes, if the underlying problem isn't fixed, the code will likely return.
Why does this code relate to other SPN codes?
SPN 4367 can be associated with other codes tied to air intake and pressure issues, as they often stem from similar problems.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →