P0158 – BMW DTC

BMW DTC P0158 – O2 Sensor Circuit High Voltage (Bank 2 Sensor 2)

DTC P0158 meaning on BMW

The Diagnostic Trouble Code (DTC) P0158 for BMW indicates that there is a high voltage condition in the oxygen sensor circuit of Bank 2 Sensor 2. This means that the oxygen sensor located after the catalytic converter on the second bank of cylinders is sending a signal indicating a voltage higher than the specified range.

BMW DTC P0158 symptoms

Symptoms associated with DTC P0158 on a BMW may include:

• Check Engine Light (CEL) illuminated on the dashboard
• Decreased fuel efficiency
• Engine running rough or misfiring
• Failed emissions test

BMW DTC P0158 causes

The high voltage condition in the oxygen sensor circuit of Bank 2 Sensor 2, leading to DTC P0158 on a BMW, can be caused by various factors, including:

• Faulty oxygen sensor
• Wiring or connector issues in the oxygen sensor circuit
• Exhaust leaks near the oxygen sensor
• Engine running rich

BMW DTC P0158 seriousness

While DTC P0158 may not cause immediate drivability issues, it is important to address this fault promptly. Ignoring this fault can lead to decreased fuel efficiency, increased emissions, and potential damage to the catalytic converter over time.

How to diagnose DTC P0158 on BMW

To diagnose DTC P0158 on a BMW, you can follow these steps:

1. Use an OBD-II scanner to retrieve the fault code and verify the high voltage condition in Bank 2 Sensor 2.
2. Inspect the wiring and connectors in the oxygen sensor circuit for any damage or corrosion.
3. Check for exhaust leaks near the oxygen sensor.
4. Perform a visual inspection of the oxygen sensor for any physical damage.

How to fix DTC P0158 on BMW

To fix DTC P0158 on a BMW, you can consider the following actions:

1. Replace the faulty oxygen sensor in Bank 2 Sensor 2.
2. Repair any damaged wiring or connectors in the oxygen sensor circuit.
3. Address any exhaust leaks near the oxygen sensor.
4. Diagnose and fix any underlying engine issues that may be causing the high voltage condition.

How to erase DTC P0158 on BMW

After addressing the root cause of DTC P0158 on a BMW, you can erase the fault code using an OBD-II scanner. Follow these steps:

1. Connect the OBD-II scanner to the vehicle’s diagnostic port.
2. Access the scanner’s menu to clear the fault codes stored in the system.
3. Follow the on-screen prompts to erase the DTC P0158 code.
4. Once the code is cleared, you can verify that the Check Engine Light is no longer illuminated.

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

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.