Intake Manifold Pressure Sensor Out of Range
The intake manifold pressure sensor reading is outside the expected range.
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What it means (plain English)
The system is checking the pressure in the intake manifold. If the pressure is too high or too low, it triggers a code. Basically, the sensor is not working right or there’s a problem with airflow.
What the computer is actually seeing
The engine control module (ECM) monitors the intake manifold pressure sensor and expects readings typically between 10 to 30 inches of mercury (Hg) during normal operation. If the reading is above 30 inches or below 10 inches, it throws a fault code.
What a healthy reading looks like
10 to 30 inches Hg during normal operation; maximum of 300 mV for a low pressure or around 5V for high pressure.
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. Verify the fault code with a scan tool. Check if other related codes are present.
- 22. Inspect the wiring and connectors to the intake manifold pressure sensor for damage or corrosion. Repair if necessary.
- 33. Check intake manifold pressure using a manual gauge. Compare it with the sensor readings. They should align under similar conditions.
- 44. Inspect for vacuum leaks around the intake manifold. Use a smoke machine if needed to find leaks.
- 55. Replace the intake manifold pressure sensor if it’s reading incorrectly but all mechanical aspects are fine.
Common causes
- Faulty intake manifold pressure sensor
- Vacuum leak in the intake system
- Blocked air filter
- Wiring issues or connector problems
- Faulty ECM
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally drivable, but performance may be affected, so have it checked soon.
Will this code come back after clearing?
If the underlying issue isn't fixed, yes, it will likely return.
Why does this code sometimes pair with SPN 4352?
SPN 4352 indicates a similar issue but could involve different aspects of the intake pressure sensor circuit.
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