Intake Manifold Pressure Sensor Out of Range - High
The intake manifold pressure is higher than expected during operation.
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)
The computer measures the pressure in the intake manifold and expects it to be within a certain range while the engine runs. If the pressure goes too high, it means there might be too much boost or a sensor issue.
What the computer is actually seeing
The ECM reads the input from the intake manifold pressure sensor and expects values typically between 10 inHg (0.34 bar) and 30 inHg (1.02 bar) at idle and cruise conditions. A value above the normal operating range indicates a problem.
What a healthy reading looks like
Intake manifold pressure should be between 5-30 inHg (0.17-1.02 bar) at idle; above 40 inHg indicates a fault (overboost).
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 to the intake manifold pressure sensor for corrosion or damage. If damaged, repair and retest.
- 22. Verify sensor operation by checking the voltage output with a scan tool or multimeter (expected output approx. 0.5-4.5V with pressure change). Replace sensor if out of range.
- 33. Inspect all intake and vacuum lines for leaks or obstructions. Fix any issues found and retest.
- 44. Check if the turbocharger is boosting above normal levels; look for wastegate issues if present. Correct any abnormalities and retest.
- 55. If all previous steps are good, check ECM for fault codes related to airflow and update software if needed. Re-flash if specified.
Common causes
- Faulty intake manifold pressure sensor
- Turbocharger overboost
- Leaky intake manifold or vacuum lines
- Clogged intake passages
- Faulty ECM calibration
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It's generally safe to drive short distances, but fix it soon to avoid potential engine damage.
Will this code clear on its own?
If the issue resolves, the code may clear on its own; otherwise, a scan tool is needed.
Why might this code be related to other codes?
It's often tied to boost control issues, so codes for turbo or boost pressure may appear together.
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