P112E – Manifold Absolute Pressure at Accelerator Angle Too Low, Bank 1

Code P112E: Malfunction of the MAP Sensor or Circuit

Probable Causes:

  • Faulty MAP sensor (internal failure or abnormal response).

  • Electrical problem: Damaged sensor wiring (open circuit, short circuit), oxidized connectors, or broken pins.

  • Faulty connection: Poor sensor mounting or corrosion at the terminals.

  • Electronic throttle actuator failure (related to synchronization with the MAP sensor).

Symptoms:

  • Check engine light on (or “Service engine soon” message).

  • Unstable idle or engine stalling.

  • Loss of power or hesitation during acceleration.

  • Increased fuel consumption.

Meaning of Code P112E:
The MAP (Manifold Absolute Pressure) sensor measures the vacuum in the intake manifold to determine engine load. This data is used by the ECU to adjust:

  • Fuel injection.

  • Ignition timing.

  • Idle speed control.

Code P112E is triggered when the ECU detects an inconsistency between:

  • The throttle pedal position (via the electronic actuator).

  • The vacuum measured by the MAP sensor.
    For example, a MAP signal that is too low at full throttle (where vacuum should be nearly zero) indicates a fault.

Diagnostic Procedure:

  1. Visual inspection:

    • Check the MAP sensor, its connector, and the wiring harness (look for cut wires, corrosion, or physical damage).

    • Check the intake system for leaks (vacuum leaks distort readings).

  2. Electrical test:

    • Measure the sensor supply voltage (typically 5V) and ground with a multimeter.

    • Check the MAP output signal (varies with vacuum: ~1V at full throttle, ~4-5V at idle).

  3. Data analysis:

    • Use an OBD-II scanner to observe real-time MAP sensor values. Compare them to expected values (e.g., 30-50 kPa at idle, ~100 kPa at full throttle).

  4. Throttle actuator check:

    • Test its resistance and operation via the ECU (some scanners allow manual actuator activation).

Repair Procedure:

  1. MAP sensor replacement:

    • Disconnect the battery before any work.

    • Install a new sensor that meets manufacturer specifications (avoid low-quality parts).

  2. Electrical circuit repair:

    • Repair or replace damaged wires. Clean connectors with contact cleaner.

  3. Code reset:

    • Clear the P112E code with an OBD-II scanner after repairs. Perform a drive cycle to confirm the issue is resolved.

Technical Tips:

  • Check for vacuum leaks: A cracked intake manifold or detached hose disrupts MAP readings. Use a smoke machine or leak detection spray.

  • Software update: On some vehicles, an ECU recalibration using manufacturer software is required.

  • Prioritize comprehensive diagnostics: A faulty throttle actuator may be a secondary symptom (e.g., issue with EGR valve or turbocharger).

P112E BMW – Manifold Absolute Pressure at Throttle Angle Too Low, Bank 1

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.

P112E BUICK – Intermittent Intake Air Temperature Sensor Circuit 3

P112E BUICK Possible Causes

  • Faulty intake air temperature sensor
  • Intake air temperature sensor harness is open or shorted
  • Poor electrical connection in the intake air temperature sensor circuit

How to Fix P112E BUICK Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring 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 BUICK Meaning

The intake air temperature (IAT) sensor contains a semiconductor device that changes resistance based on temperature (a thermistor). The IAT sensor is located in the air intake passage of the engine’s air intake system. The IAT sensor has a signal circuit and a ground circuit. The powertrain control module (PCM) monitors the intake air temperature sensor signal. The PCM sets the OBDII code when the intake air temperature sensor signal is outside factory specifications.

P112E CADILLAC – Intermittent Circuit for Intake Air Temperature Sensor 3

P112E CADILLAC Possible Causes

What does this mean?

  • Faulty intake air temperature sensor
  • Intake air temperature sensor harness is open or shorted
  • Poor electrical connection in the intake air temperature sensor circuit

How to fix P112E CADILLAC code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring 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 CADILLAC Meaning

The intake air temperature (IAT) sensor contains a semiconductor device that changes resistance based on temperature (a thermistor). The IAT sensor is located in the air intake passage of the engine’s air intake system. The IAT sensor has a signal circuit and a ground circuit. The Powertrain Control Module (PCM) monitors the intake air temperature sensor signal. The PCM sets the OBDII code when the intake air temperature sensor signal is outside factory specifications.

P112E CHEVROLET – Intermittent Intake Air Temperature Sensor 3 Circuit

P112E CHEVROLET Possible Causes

  • Faulty intake air temperature sensor
  • Intake air temperature sensor harness is open or shorted
  • Poor electrical connection in the intake air temperature sensor circuit

How to Fix P112E CHEVROLET Code?

Start by checking the “possible causes” listed above. Visually inspect the related wiring 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 CHEVROLET Meaning

The intake air temperature (IAT) sensor contains a semiconductor device that changes resistance based on temperature (a thermistor). The IAT sensor is located in the air intake passage of the engine’s air intake system. The IAT sensor has a signal circuit and a ground circuit. The Powertrain Control Module (PCM) monitors the intake air temperature sensor signal. The PCM sets the OBDII code when the intake air temperature sensor signal is outside factory specifications.

P112E GMC – Intermittent Intake Air Temperature Sensor 3 Circuit

P112E GMC Possible Causes

  • Faulty intake air temperature sensor
  • Intake air temperature sensor harness is open or shorted
  • Poor electrical connection in the intake air temperature sensor circuit

How is P112E GMC Code Repaired?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring 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 GMC Meaning

The intake air temperature (IAT) sensor contains a semiconductor device that changes resistance based on temperature (a thermistor). The IAT sensor is located in the air intake passage of the engine’s air intake system. The IAT sensor has a signal circuit and a ground circuit. The powertrain control module (PCM) monitors the intake air temperature sensor signal. The PCM sets the OBDII code when the intake air temperature sensor signal is outside factory specifications.

P112E MINI – Manifold Absolute Pressure at Accelerator Angle Too Low, Row 1

P112E MINI 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 electric motor throttle actuator

How to Fix P112E MINI 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

  • Engine light on (or engine service warning light soon)

P112E MINI 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 detected when the verified air mass flow falls below a threshold value.

P112F – Manifold Absolute Pressure at Accelerator Angle Too High, Bank 1

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.

P112F BMW – Manifold Absolute Pressure at Throttle Angle Too High, Bank 1

P112F BMW Possible Causes

  • 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 throttle body

How to Fix BMW P112F Code?

Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring 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 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 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. Higher vacuum exists during overrun conditions because the throttle 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.

P112F BUICK – Radiator Coolant Temperature Sensor

P112F BUICK Possible Causes

  • Faulty radiator coolant temperature sensor
  • Radiator coolant temperature sensor harness is open or shorted
  • Poor electrical connection in the radiator coolant temperature sensor circuit
 

How to Fix P112F BUICK 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)
 

P112F BUICK Meaning

The Engine Radiator Coolant Temperature (RCT) sensor is a variable resistor that measures the engine coolant temperature in the radiator. The Engine Control Module (ECM) provides 5 volts to the engine radiator coolant temperature signal circuit and supplies ground to the low reference circuit. The purpose of this diagnostic is to determine if the RCT sensor input is hotter than normal. The ECM‘s internal clock will record how long the engine has been off. If the required engine off time is met at startup, the ECM will compare the temperature difference between the actually measured RCT and ECT sensors.