P0112 – BMW DTC

BMW DTC P0112 – Intake Air Temperature Sensor 1 Circuit Low (Bank 1)

DTC P0112 meaning on BMW

The Diagnostic Trouble Code (DTC) P0112 for BMW refers to the Intake Air Temperature Sensor 1 Circuit Low on Bank 1. This code indicates that the Engine Control Module (ECM) has detected a lower than normal voltage signal from the intake air temperature sensor.

BMW DTC P0112 symptoms

Symptoms of a DTC P0112 on a BMW may include:

• Check Engine Light illuminated on the dashboard
• Decreased engine performance or rough idling
• Poor fuel efficiency
• Engine stalling or hesitation

BMW DTC P0112 causes

Common causes of a DTC P0112 on a BMW include:

• Failed intake air temperature sensor
• Wiring or connector issues in the intake air temperature sensor circuit
• ECM software or hardware problems

BMW DTC P0112 seriousness

While a DTC P0112 may not cause immediate harm to the vehicle, it can lead to poor engine performance and decreased fuel efficiency. Ignoring this code may result in further damage to engine components over time.

How to diagnose DTC P0112 on BMW

To diagnose a DTC P0112 on a BMW, you can follow these steps:

1. Use an OBD-II scanner to retrieve the fault code and freeze frame data
2. Inspect the intake air temperature sensor and its wiring for any visible damage
3. Test the intake air temperature sensor using a multimeter to check for proper resistance values
4. Check the ECM for any software updates or malfunctions

How to fix DTC P0112 on BMW

To fix a DTC P0112 on a BMW, you can try the following solutions:

1. Replace the intake air temperature sensor if it is faulty
2. Repair or replace any damaged wiring or connectors in the sensor circuit
3. Clear the fault code and reset the ECM by disconnecting the battery for a few minutes
4. If the issue persists, seek professional help for further diagnosis and repair

How to erase DTC P0112 on BMW

To erase a DTC P0112 on a BMW, you can:

1. Use an OBD-II scanner to clear the fault code
2. Disconnect the battery for a few minutes to reset the ECM and clear the code
3. After performing the necessary repairs, ensure the issue is resolved before clearing the code

Recommended tools & DTC Scanners for BMW

Best Diagnostic App for modern BMWs: BimmerLink

Recommended Bluetooth adapter for Bimmerlink: OBDLink CX

Cable adapter for Bimmerlink: Enet Cable USB Type C

For older BMWs we recommend: Autel AutoLink AL319 (2024 version)

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

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