Absorption Pressure Sensor Out of Range
The absorption pressure sensor is reporting a value out of its expected range.
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What it means (plain English)
The absorption pressure sensor, which measures the pressure in the system, is giving readings that are too low or too high, indicating a possible issue with the sensor or the system it monitors.
What the computer is actually seeing
The ECM sees pressure readings from the absorption pressure sensor that fall outside of the normal range, typically less than 0.5 V or greater than 4.5 V in an analog signal context.
What a healthy reading looks like
Normal signals from the absorption pressure sensor should range between 0.5V to 4.5V under working conditions, corresponding to a pressure range of 10 to 30 psi.
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. Check the wiring and connector for the absorption pressure sensor. Look for frays, corrosion, or loose connections.
- 2If the wiring and connections are good, move to step 2.
- 32. Verify the operation of the absorption pressure sensor using a multimeter. Measure the voltage output. It should be between 0.5V and 4.5V under normal conditions.
- 4If the measured voltage is within range, check for air leaks in the system before replacing the sensor.
- 53. If the voltage is outside the expected range, replace the absorption pressure sensor and retest the system.
Common causes
- Faulty absorption pressure sensor
- Wiring issues or poor connections
- Clogged intake air filter
- Air leaks in intake system
- Improper software calibration
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Driving with this code may affect performance and fuel efficiency, so it's best to address it soon.
Will the code come back after repair?
If the root issue is correctly fixed, the code shouldn't return.
Why is this code showing up with SPN 430?
SPN 430 usually relates to the predetermined values from the absorption pressure sensor, so they often trigger together if there's a sensor failure.
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