P112D – Negative Current Control Circuit or Positive Current Control Circuit of Oxygen Sensor / Open Circuit of Row 2 Sensor 1

P112D Possible Causes

  • Faulty oxygen (O2) sensor, bank 2 sensor 1
  • O2 sensor, bank 2 Sensor 1 harness is open or shorted
  • O2 sensor, bank 2, sensor 1 circuit, poor electrical connection

How is code P112D 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)

P112D Meaning

The engine control module (ECM) monitors the oxygen (O2) sensor, bank 2, sensor 1. The ECM sets the OBDII code when the oxygen (O2) sensor, bank 1, sensor 1 does not meet factory specifications.

P112D BMW – Negative Current Control Circuit or Positive Current Control Circuit of Oxygen Sensor / Open Circuit of Row 2 Sensor 1

🚗 BMW P112D Error Code – Causes, Symptoms, and Solutions

🔎 Possible Causes of BMW P112D Code

The P112D code indicates a problem with the oxygen sensor (O2), bank 2, sensor 1. Possible causes include:

✅ Faulty oxygen sensor (O2) (bank 2, sensor 1)
✅ Open or short circuit in the O2 sensor wiring
✅ Poor electrical connection in the O2 sensor circuit

⚠️ Possible Symptoms

If your vehicle has the P112D code, you may experience the following symptoms:

🚨 Check engine light on (“Check Engine” or “Service Engine Soon”)
🚗 Reduced engine performance (in some cases)
⛽ Increased fuel consumption

🛠️ How to Fix BMW P112D Code?

To correct this issue, follow these steps:

1️⃣ Check the possible causes mentioned above.
2️⃣ Visually inspect the wiring harness and connectors: look for damaged wires, broken, bent, or corroded pins.
3️⃣ Replace the O2 sensor if necessary after confirmation with a multimeter or diagnostic tool.
4️⃣ Clear the error code and test again with an OBD-II scanner.

📖 Meaning of BMW P112D Code

The engine control module (ECM) monitors the oxygen sensor (O2), bank 2, sensor 1.
When this sensor does not operate according to manufacturer specifications, the P112D code is stored and may affect engine operation.

P112D BUICK – Intake Air Temperature Sensor 3 Circuit High Voltage

🔧 P112D BUICK Code: Causes, Symptoms, and Solutions

📌 Definition of P112D BUICK Code

The error code P112D indicates a problem with the Intake Air Temperature Sensor (IAT). The PCM (Powertrain Control Module) detects that the IAT sensor value is outside the manufacturer’s specified range.

🚨 Possible Symptoms

  • 🔥 Engine light on (Check Engine)
  • 🚗 Unstable idle or engine stalling
  • ⛽ Poor fuel consumption
  • 🌡️ Reduced engine performance

⚠️ Possible Causes of P112D Code

🔍 Main causes include:

  1. Faulty Intake Air Temperature Sensor (IAT)
  2. Damaged IAT sensor wiring harness (shorted or open)
  3. Poor electrical connection in the IAT sensor circuit

🛠️ How to Fix P112D BUICK Code?

1️⃣ Visually inspect the wiring harness
🔎 Check the IAT sensor connectors and wires.
✅ Look for broken, melted, corroded, or disconnected wires.

2️⃣ Test the air temperature sensor with a multimeter
🔧 Measure the IAT sensor resistance at different temperatures:

  • At 20°C, resistance should be around 2,500 Ω.
  • At 50°C, it should drop to approximately 700 Ω.

3️⃣ Scan for codes with an OBD-II tool
📊 Use an OBD-II scanner to check for other error codes.

4️⃣ Clear codes and test the vehicle
🚗 If the problem persists after repairs, replace the IAT sensor.

📌 Conclusion

The P112D BUICK code is usually caused by a faulty IAT sensor or an electrical connection issue. Checking the wiring harness, performing a resistance test, and using an OBD-II scan will help diagnose and resolve the problem.

P112D CADILLAC – Intake Air Temperature Sensor Circuit 3 High Voltage

P112D CADILLAC 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 P112D 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)

P112D 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.

P112D CHEVROLET – Intake Air Temperature Sensor 3 Circuit High Voltage

P112D 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 P112D CHEVROLET 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)

P112D 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.

P112D GMC – Intake Air Temperature Sensor 3 Circuit High Voltage

P112D 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 P112D 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)

P112D 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.

P112D MINI – Negative Current Control Circuit or Positive Current Control Circuit of Oxygen Sensor / Open Circuit of Row 2 Sensor 1

P112D MINI Possible Causes

  • Faulty oxygen sensor (O2), bank 2 sensor 1
  • O2 sensor, bank 2 Sensor 1 harness is open or shorted
  • O2 sensor, bank 2, sensor 1 circuit, poor electrical connection
 

How to Fix Code P112D MINI?

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)
 

P112D MINI Meaning

The engine control module (ECM) monitors the oxygen sensor (O2), bank 2, sensor 1. The ECM sets the OBDII code when the oxygen sensor (O2), bank 1, sensor 1 does not meet factory specifications.

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.