Intake Manifold Pressure Sensor Circuit
Intake manifold pressure sensor has detected a fault.
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 is seeing a problem with the sensors that measure the pressure in the intake manifold, which is crucial for the engine's air-fuel mix.
What the computer is actually seeing
The intake manifold pressure sensor sends a voltage signal that varies with the pressure; healthy readings fluctuate between 0.5V at full vacuum (about 30 inHg) to around 4.5V at atmospheric pressure.
What a healthy reading looks like
When at idle, the intake manifold pressure should read approximately 20 inHg, corresponding to a voltage around 1.5V to 2.0V from the sensor.
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.
- 1Check wiring and connector integrity at the intake manifold pressure sensor for damage or corrosion.
- 2Inspect vacuum lines for leaks; they should be intact with no holes or cracks.
- 3Use a multimeter to measure the voltage at the sensor; it should fluctuate as described under expected values.
- 4Compare readings to the pressure gauge to confirm sensor accuracy, noting that significant discrepancies point to a faulty sensor.
Common causes
- Wiring issues between the sensor and the ECM
- Faulty intake manifold pressure sensor
- Vacuum leak in the intake manifold
- Improper engine grounds or interference from other sensors.
Typical repair cost
$$ - $$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It's drivable but could affect performance and fuel efficiency, so fix it soon.
Will this issue reoccur after I fix it?
If underlying wiring or connection issues aren't resolved, it could come back.
Why do I see this code along with others?
Multiple codes often indicate a common issue, like a failing sensor or wiring problem affecting multiple systems.
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