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.

P112F CADILLAC – Radiator Coolant Temperature Sensor

P112F CADILLAC 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 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)

P112F CADILLAC 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 provides ground to the low reference circuit. The purpose of this diagnostic is to determine if the RCT sensor input is hotter than normal. The internal clock of the ECM will record how long the engine is 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.

P112F GMC Code: Radiator Temperature Sensor Problem

The P112F code on GMC vehicles indicates a malfunction of the Radiator Coolant Temperature (RCT) sensor. The ECM compares data from the RCT sensor with that from the Engine Coolant Temperature (ECT) sensor. If the difference exceeds specifications after the engine has been shut down, the code is stored.

Common Symptoms

  • Check Engine Light On (P112F code sometimes accompanied by P0116-P0118).
  • Radiator Fan Running Continuously.
  • Potential Overheating if the cooling system does not regulate correctly.

Main Causes

Category Details
Faulty RCT Sensor Internal resistance out of specifications (typically 200–5,000 Ω depending on temperature).
Electrical Issues Cut wiring, short circuit, or corroded connector (5V or ground wires).
Faulty ECM Damaged 5V signal or reference circuit.
Coolant Problem Low level, air bubbles, or stuck thermostat.

Diagnostic Steps

1. Preliminary Checks

  • Coolant Level: Top up if necessary (50% antifreeze mixture).
  • Air Bleed: Avoid air bubbles in the circuit (specific GMC procedure).

2. RCT Sensor Test

  • Location: On the radiator or lower hose.
  • Resistance: Disconnect the connector and measure with a multimeter:
    • When Cold (20°C): ~3,500 Ω.
    • When Hot (90°C): ~200 Ω.
  • ECT/RCT Comparison: Use a scan tool to check temperature consistency (max. 10°C difference after engine shutdown).

3. Electrical Inspection

  • 5V Power Supply: Measure voltage between the signal wire and ground (engine off).
  • Continuity: Check wires between the sensor and ECM (no short circuit or break).

4. Thermostat Test

  • Operation: Check for progressive opening starting at 90°C (marker on the thermostat).
  • Replacement: If stuck open/closed (cost: €30–100).

Solutions and Costs

Problem Solution Cost (€)
Faulty RCT Sensor Replace with an OEM part (e.g., ACDelco 213-4484). 50–120
Damaged Wiring Repair the harness or replace the connector. 30–150
Faulty ECM Reprogramming or replacement (at a dealership). 500–1,200

Best Practices

  • Use Dex-Cool coolant (specific to GMC) to avoid corrosion.
  • Reset the ECM after repair to clear adaptations.

FAQ

Q: Can I drive with a P112F code?
A: Yes, but monitor the temperature. Overheating can damage the engine.

Q: Why does the code return after replacing the sensor?
A: Check the wiring or thermostat. A clogged circuit or ECM fault may persist.

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

P112F 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 throttle body

How to Fix P112F 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)

P112F 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 the amount of fuel injection, the ignition advance or retard rate, boost pressure control, and idle control.
The Digital Motor Electronics (DME) monitors the plausible throttle position relative to the vacuum applied in the intake pipe. The Diagnostic Trouble Code (DTC) is recognized when the monitored mass flow exceeds a limit value.