Intake Manifold Pressure Sensor Circuit Low
The intake manifold pressure sensor is reading a low voltage condition.
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What it means (plain English)
The sensor measures air pressure in the intake manifold, and a low reading usually means there's a problem with the sensor, wiring, or the manifold pressure itself.
What the computer is actually seeing
The ECM expects the intake manifold pressure to be within a specific range. If the voltage from the sensor drops below 0.5 volts (which is typically too low), the ECM triggers this fault code.
What a healthy reading looks like
Normal voltage for the intake manifold pressure sensor usually ranges between 0.5V to 4.5V, depending on engine load.
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 of the intake manifold pressure sensor for damage or corrosion. If found, repair and retest.
- 22. Check the intake manifold pressure sensor with a multimeter. Ensure voltage readings are within 0.5V to 4.5V while cranking and idling. If out of range, replace the sensor.
- 33. Using a vacuum gauge, check for vacuum leaks in the intake manifold. Repair any leaks identified.
- 44. If steps 1-3 check out, use a scan tool to verify ECM functionality and check for other associated codes.
Common causes
- Faulty intake manifold pressure sensor
- Wiring issue in the sensor circuit
- Vacuum leaks in the intake manifold
- ECM malfunction
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code present?
It's not recommended to drive for long periods as it can affect performance and fuel economy.
Will this code come back after I clear it?
If the underlying issue is not fixed, the code will likely reappear.
Why does this code relate to low voltage?
The system monitors the voltage output from the sensor; a low voltage indicates a potential failure in the sensor or its circuit.
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