Manifold Absolute Pressure (MAP) / Barometric Pressure Circuit Malfunction
Was bedeutet das?
The MAP sensor measures intake manifold vacuum pressure to help the PCM calculate engine load. Code P0105 indicates a general malfunction in this circuit.
Haftungsausschluss: Dieser Diagnosecode ist Teil des OBD2-Standards und gilt für Mercedes-benz S-class Modelle von 1996 bis 2026. Bitte beachten Sie jedoch, dass dies von der genauen Motorkonfiguration abhängt.
Häufige Ursachen
Defekter MAP-Sensor (Saugrohrdrucksensor)
Beschädigter oder gebrochener Kabelbaum
Korrodierter oder loser Steckverbinder
Vakuumleck im Ansaugsystem
Zu beachtende Symptome
- Motorkontrollleuchte leuchtet
- Unruhiger oder instabiler Leerlauf
- Motor geht unerwartet aus
- Schlechte Beschleunigung oder träge Reaktion
- Erhöhter Kraftstoffverbrauch
- Schwierigkeiten beim Starten des Motors
Wie man diagnostiziert
Häufige Lösungen
**Replace the Manifold Absolute Pressure (MAP) Sensor:** This is the most common fix if the sensor itself is determined to be faulty after electrical and vacuum testing. Ensure you use a quality OEM or reputable aftermarket sensor.
**Repair or Replace Damaged Vacuum Hoses/Lines:** Address any vacuum leaks found during the initial inspection. This could involve replacing cracked or hardened vacuum hoses, securing loose connections, or replacing a faulty PCV valve or its hose.
**Repair or Replace Damaged Wiring/Connector:** If diagnostic steps reveal an open, short, or high resistance in the MAP sensor's wiring harness or a corroded/damaged connector, the affected section must be repaired or replaced to restore proper circuit integrity.
**Address Intake Manifold Gasket Leaks:** If a significant vacuum leak is identified at the intake manifold gasket, it must be replaced. This is a more involved repair but crucial for proper engine operation and MAP sensor readings.