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P1393 – BMW DTC

BMW DTC P1393 – Ionic Current Voltage Selection Circuit Low

DTC P1393 meaning on BMW

The Diagnostic Trouble Code (DTC) P1393 for BMW refers to the Ionic Current Voltage Selection Circuit Low. This code indicates that there is a low voltage condition detected in the ionic current measurement circuit.

BMW DTC P1393 symptoms

Symptoms of DTC P1393 on a BMW may include:

  • Check Engine Light (MIL) illuminated
  • Engine running rough
  • Reduced engine performance
  • Possible misfires

BMW DTC P1393 causes

Common causes of DTC P1393 on a BMW include:

  • Faulty ionic current sensor
  • Wiring or connection issues in the ionic current measurement circuit
  • ECU (Engine Control Unit) malfunction

BMW DTC P1393 seriousness

The seriousness of DTC P1393 on a BMW depends on the underlying cause. Ignoring this code can lead to potential engine performance issues and may result in further damage if not addressed promptly.

How to diagnose DTC P1393 on BMW

To diagnose DTC P1393 on a BMW, you can follow these steps:

  1. Use a diagnostic scanner to retrieve the fault codes
  2. Inspect the ionic current sensor and its wiring for any visible damage
  3. Check the ECU for any stored fault codes related to the ionic current circuit

How to fix DTC P1393 on BMW

To fix DTC P1393 on a BMW, you may need to:

  1. Replace the faulty ionic current sensor
  2. Repair any damaged wiring or connections in the circuit
  3. If the issue persists, consult a professional mechanic for further diagnosis

How to erase DTC P1393 on BMW

To erase DTC P1393 on a BMW, you can:

  1. Use a diagnostic scanner to clear the fault codes
  2. After fixing the underlying issue, drive the vehicle to allow the ECU to relearn and verify that the code does not return

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

← All BMW Diagnostic Trouble Codes

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