Air Intake Manifold Pressure Sensor Voltage High
The intake manifold pressure sensor is reporting a voltage above the expected range.
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What it means (plain English)
The sensor that measures how much air pressure is in the engine's intake manifold is sending a signal that suggests it's seeing too much voltage, which usually means there's an electrical issue or the sensor itself is faulty.
What the computer is actually seeing
The engine control module (ECM) sees the voltage from the manifold pressure sensor at a level higher than the maximum threshold, which could be around 5 volts. This triggers the fault code because it indicates a potential wiring problem or a bad sensor.
What a healthy reading looks like
The expected voltage from the intake manifold pressure sensor should normally be between 0.5 to 4.5 volts corresponding to the intake pressure range.
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 going to the intake manifold pressure sensor for damage or corrosion. If any issues are found, repair/replace as necessary.
- 22. Measure the voltage at the intake manifold pressure sensor connector with the key on, engine off. Voltage should be below 5 volts. If it is above, there's likely a short to voltage.
- 33. If the wiring is good and voltage is normal, swap the intake manifold pressure sensor with a known good one. Test again for proper function.
- 44. Clear the code and run the engine to see if the code returns. If it does, check the ECM for updates or malfunction.
Common causes
- Faulty intake manifold pressure sensor
- Damaged wiring or connectors to the sensor
- Short circuit in the sensor circuit
- ECM malfunction
- Air leaks in the intake system
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code present?
It's generally safe to drive but performance may be affected. Fix soon to avoid potential issues.
Will this code clear on its own?
If the underlying issue is resolved, the code should clear after a number of drive cycles.
Why does this code pair with others?
Fault codes often point to related issues in the same system, so multiple codes can point to similar problems.
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