P112E BMW Possible Causes
What does it mean?
- Faulty intake pipe vacuum sensor
- Intake pipe vacuum sensor harness is open or shorted
- Poor electrical connection in the intake pipe vacuum sensor circuit
- Faulty electric motor throttle actuator
How to fix BMW P112E code?
Start by checking the “possible causes” listed above. Visually inspect the corresponding cable harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Check engine light on (or service engine soon warning light)
P112E BMW Meaning
The Manifold Absolute Pressure (MAP) sensor is used to monitor engine load by sampling the vacuum in the intake manifold. At idle, a high vacuum will exist because the throttle is in the idle load position and the engine cylinders act as an air pump against a restriction. Higher vacuum exists during overrun conditions because the throttle is in the idle load position and engine speed is high. Intake manifold vacuum disappears when the throttle is open and intake manifold pressure is approximately equal to atmospheric pressure. Higher vacuum exists during overrun conditions because the throttle is in the idle load position and engine speed is high.
The MAP sensor signal can be used to calculate fuel injection quantity, ignition advance or retard rate, boost pressure control, and idle control.
The Digital Motor Electronics (DME) monitors the plausible throttle position relative to the applied vacuum in the intake pipe. The Diagnostic Trouble Code (DTC) is detected when the verified mass air flow falls below a threshold value.