What does code P1105 mean?

Q: What does code P1105 mean?

Atmospheric Pressure Sensor In Control Module. P1105 on Mercedes-Benz vehicles indicates that the engine control module (ECM) has detected a fault in its internal atmospheric pressure sensor circuit, which is used to calculate air density and adjust fuel delivery. The ECM compares this sensor's output against expected values and sets the code when the signal is out of range or implausible.

DTC codes / Mercedes-Benz codes / P1105

P1105 · Mercedes-BenzAtmospheric Pressure Sensor In Control Module

P1105 on Mercedes-Benz vehicles indicates that the engine control module (ECM) has detected a fault in its internal atmospheric pressure sensor circuit, which is used to calculate air density and adjust fuel delivery. The ECM compares this sensor's output against expected values and sets the code when the signal is out of range or implausible.

SystemPowertrain

Code typeMercedes-Benz specific

SeverityMedium

Fix difficultyProfessional

AreaFuel and air metering

Guidance is general and written for Mercedes-Benz vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.