P0105 to P0109, P0068, P0069 and P0129: manifold pressure sensor
The manifold absolute pressure (MAP) sensor, which on some engines also reads barometric pressure, has a circuit fault or an implausible, low, high or intermittent signal, or its reading disagrees with the throttle position or the barometric pressure.
SeverityModerateUsually not urgent today, but it can get worse if left.
Can you keep driving?Drive gently, check it soonWhat does P0105 mean?
The MAP sensor measures the pressure inside the intake manifold, which tells the engine computer how hard the engine is working. On engines without an air flow meter it is the main measure of how much air goes in, so a bad reading upsets the fuel mixture and the ignition timing. P0068 and P0069 say its reading does not agree with what the throttle or the outside air pressure suggests, which often means a vacuum leak or a blocked sensor port rather than a failed sensor.
What causes P0105?
- A split or disconnected vacuum hose to the MAP sensor
- A sensor port blocked with oil or soot
- A failed MAP sensor or a damaged wire to it
- A vacuum leak in the intake, for the correlation codes
- A shared reference voltage pulled down by another faulty sensor
What to check first for P0105
- With the engine off, compare the MAP reading with barometric pressure on a scan tool
- Inspect the sensor's hose and port for splits, oil and soot
- Look for other sensor codes, which together point to a shared supply
- Check the intake for vacuum leaks if the correlation codes are stored
Can you drive with P0105?
Usually you can drive to a workshop. Expect hesitation, rough running or higher fuel use; if the engine stalls or runs very poorly, keep the trip short.
Clear a code only after the fault is fixed. A code that comes back means the cause is still there, and a warning light left on can hide a second fault behind the first.
Codes on this page
- P0105Manifold Absolute Pressure/Barometric Pressure Circuit
- P0106Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance
- P0107Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
- P0108Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- P0109Manifold Absolute Pressure/Barometric Pressure Circuit Intermittent
- P0068MAP/MAF - Throttle Position Correlation
- P0069Manifold Absolute Pressure - Barometric Pressure Correlation
- P0129Barometric Pressure Too Low
Related codes
Checked on · Rafael Soares
These are the generic meanings every manufacturer shares. Each brand adds its own detail, so your car's handbook, its service information and a qualified mechanic have the last word. OdoKeep has no connection with any manufacturer, and the app does not read codes from the car.
