P112F Possible Causes
- Faulty intake pipe vacuum sensor
- Intake pipe vacuum sensor harness is open or short-circuited
- Poor electrical connection in the intake pipe vacuum sensor circuit
- Faulty throttle body
How to Fix Code P112F?
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)
P112F 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. A higher vacuum exists during overrun conditions because the accelerator is in the idle load position and the engine speed is high. The intake manifold vacuum disappears when the throttle is open and the intake manifold pressure is approximately equal to atmospheric pressure. A higher vacuum exists during overrun conditions because the accelerator is in the idle load position and the 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 recognized when the monitored mass flow exceeds a threshold value.