BMW DTC P112D – O2 Sensor Negative Current or Positive Current Control Circuit/Open (Bank 2 Sensor 1)
DTC P112D meaning on BMW
DTC P112D is a diagnostic trouble code that indicates an issue with the O2 sensor negative current or positive current control circuit for Bank 2 Sensor 1 in a BMW vehicle. This code specifically relates to the oxygen sensor located before the catalytic converter on the bank 2 side of the engine.
BMW DTC P112D symptoms
Symptoms of DTC P112D in a BMW may include:
- Check Engine Light illuminated on the dashboard
- Decreased fuel efficiency
- Engine running rough or misfiring
- Reduced engine performance
BMW DTC P112D causes
Common causes of DTC P112D in a BMW include:
- Faulty O2 sensor
- Open or short circuit in the O2 sensor wiring
- Corrosion or poor connections in the sensor circuit
- Issues with the engine control module (ECM)
BMW DTC P112D seriousness
While DTC P112D may not cause immediate drivability issues, it can lead to decreased fuel efficiency and potentially harm the engine over time if left unresolved. It is recommended to address this code promptly to prevent further damage.
How to diagnose DTC P112D on BMW
To diagnose DTC P112D on a BMW, a mechanic would typically perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the wiring and connections related to Bank 2 Sensor 1
- Test the O2 sensor for proper operation
- Check the ECM for any faults or programming issues
How to fix DTC P112D on BMW
To fix DTC P112D on a BMW, the following steps may be taken:
- Replace the faulty O2 sensor
- Repair any damaged wiring or connections
- Clean or replace corroded connectors
- Reset the fault codes and monitor the system for proper operation
How to erase DTC P112D on BMW
To erase DTC P112D on a BMW, the fault codes can be cleared using a diagnostic scanner. After addressing the underlying issue causing the code, the codes can be reset to see if the problem has been resolved. It is important to ensure that the root cause of the code has been fixed before clearing the codes.
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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