P0106: Manifold Absolute Pressure / Barometric Pressure Circuit Range/Performance
Severity: medium
What it means: The engine computer sees a MAP (intake manifold pressure) sensor reading that doesn't make sense for the conditions, often because of a vacuum leak or a bad sensor.
Safe to drive? Usually drivable short term. Get it checked, since the engine may run poorly or use more fuel.
Common symptoms
- Check-engine light
- Rough idle
- Hesitation
- Poor fuel economy
Likely causes, ranked
- Vacuum leak (including a failed PCV valve)DIY
- Faulty MAP sensorDIY
- Wiring or connector problemDIY
- Boost leak on turbo enginesShop
Vehicle-specific notes
- 2013–2019 Buick Encore: 1.4T: owners report oil loss and vacuum problems from the PCV built into the valve cover; GM bulletin covers it. Read the full answer · Source
What it means: The engine computer sees a MAP (intake manifold pressure) sensor reading that doesn't make sense for the conditions, often because of a vacuum leak or a bad sensor.
Severity: Medium. Safe to drive? Usually drivable short term. Get it checked, since the engine may run poorly or use more fuel.
DIY or shop?
Vacuum leak and sensor checks are DIY for many owners.
Before you replace parts
- Listen for a hiss and check vacuum hoses and the PCV system.
- Check the MAP sensor connector and wiring.
- Read all stored codes; lean codes like P0171 point to a vacuum leak.
- Clear the code only after a repair, then confirm it stays off.
Safety / mechanic note
Verify with a mechanic. A big vacuum leak can make the engine stall. A code points to a circuit or system, not always a specific part.