Engine Intake Manifold Pressure Sensor
Intake manifold pressure reading is out of expected range.
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What it means (plain English)
The engine's computer is not getting a signal from the intake manifold pressure sensor that's where it should be. This affects how the engine mixes air and fuel.
What the computer is actually seeing
The ECM sees the intake manifold pressure sensor voltage is either too high (above 4.8 volts) or too low (below 0.2 volts) during engine operation.
What a healthy reading looks like
Normal manifold pressure is typically between 0.5 and 4.5 volts, depending on engine load and speed.
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 wiring and connectors to the intake manifold pressure sensor for damage or corrosion. Decision Point: If damaged, repair or replace. If okay, proceed to step 2.
- 22. Check the intake manifold pressure sensor with a multimeter. Expected value should be between 0.5 and 4.5 volts. Decision Point: If out of range, replace the sensor. If within range, proceed to step 3.
- 33. Inspect for vacuum leaks around the intake manifold. Use a smoke machine or carb cleaner to check. Decision Point: If leaks found, repair them. If no leaks, proceed to step 4.
- 44. Scan the vehicle for related trouble codes and perform a thorough PCM update. Decision Point: If other codes relate to the same circuit, address those accordingly. If no additional codes, the problem may be intermittent or resolved.
Common causes
- Wiring damage between the sensor and ECM
- Faulty intake manifold pressure sensor
- Vacuum leaks in the intake manifold
- Poor connections at the sensor or ECM
- Exhaust leaks affecting pressure readings
Typical repair cost
$$$
Related codes
Frequently asked questions
Can I drive the vehicle with this code active?
It's best to fix soon, as it can affect drivability and emissions.
Will this code clear itself if I fix the issue?
Yes, if the underlying problem is resolved, the code should clear after a few drive cycles.
Why do I keep getting this code with other sensor errors?
Multiple sensor failures can indicate a common wiring issue or ECM fault.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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