BMW DTC P1392 – Ionic Current Voltage Selection Measuring-Circuit Open
DTC P1392 meaning on BMW
DTC P1392 on a BMW indicates an issue with the Ionic Current Voltage Selection Measuring-Circuit being open. This means that the circuit responsible for measuring the ionic current in the engine is not functioning properly, leading to potential performance issues.
BMW DTC P1392 symptoms
Symptoms of DTC P1392 on a BMW may include rough idling, engine misfires, decreased fuel efficiency, and potentially even stalling. The Check Engine Light may also be illuminated on the dashboard.
BMW DTC P1392 causes
The causes of DTC P1392 on a BMW can vary, but common reasons include a faulty ionic current sensor, damaged wiring in the measuring circuit, or a poor connection in the circuit.
BMW DTC P1392 seriousness
While DTC P1392 may not always result in immediate drivability issues, it is important to address this fault as it can lead to poor engine performance and potentially cause further damage if left unresolved.
How to diagnose DTC P1392 on BMW
To diagnose DTC P1392 on a BMW, a mechanic would typically use a diagnostic scanner to retrieve the fault code and then perform a visual inspection of the ionic current measuring circuit, checking for any visible damage or loose connections. Testing the ionic current sensor itself may also be necessary.
How to fix DTC P1392 on BMW
Fixing DTC P1392 on a BMW usually involves repairing or replacing the faulty components in the ionic current measuring circuit. This could include replacing the ionic current sensor, repairing damaged wiring, or ensuring proper connections in the circuit.
How to erase DTC P1392 on BMW
Once the underlying issue causing DTC P1392 on a BMW has been resolved, the fault code can be cleared using a diagnostic scanner. This will reset the Check Engine Light and allow the vehicle’s onboard computer to monitor the system for any new faults.
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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