AutoCodes – BMW – P1156 BMW

P1156 BMW Code - O2 Sensor Heater Circuit Low Voltage Bank 2 Sensor 2

Quick Answer

P1156 BMW indicates O2 Sensor Heater Circuit Low Voltage Bank 2 Sensor 2. Common causes include Faulty O2 Sensor Heater Bank 2 Sensor 2, O2 Sensor Heater Bank 2 Sensor 2 harness is open or shorted, O2 Sensor Heater Bank 2 Sensor 2 circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1156 BMW indicates O2 Sensor Heater Circuit Low Voltage Bank 2 Sensor 2.
Common causes: Common causes include Faulty O2 Sensor Heater Bank 2 Sensor 2, O2 Sensor Heater Bank 2 Sensor 2 harness is open or shorted, O2 Sensor Heater Bank 2 Sensor 2 circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 7,765

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 03, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1156 BMW Description

OBDII Code P1156 BMW - O2 Sensor Heater Circuit Low Voltage Bank 2 Sensor 2 - AutoCodes.com — P1156 BMW Code - O2 Sensor Heater Circuit Low Voltage Bank 2 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P1156 BMW?

Faulty O2 Sensor Heater Bank 2 Sensor 2
O2 Sensor Heater Bank 2 Sensor 2 harness is open or shorted
O2 Sensor Heater Bank 2 Sensor 2 circuit poor electrical connection

How to Fix the DTC P1156 BMW?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1156 BMW code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1156 BMW code?

Need more information on how to fix the P1156 BMW code? Get Access to Factory Service Manuals

Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1156 BMW Code

1. What are the common symptoms of OBDII code P1156 in a BMW related to the O2 Sensor Heater Circuit Low Voltage Bank 2 Sensor 2?

- Common symptoms may include poor fuel economy, rough idling, and a noticeable decrease in engine performance.

2. What are the possible causes of OBDII code P1156 in a BMW?

- The code P1156 could be triggered by a faulty O2 sensor, damaged wiring or connectors, a blown fuse, or an issue with the PCM (Powertrain Control Module).

3. How can I diagnose the O2 Sensor Heater Circuit Low Voltage Bank 2 Sensor 2 issue in my BMW?

- A diagnostic scan tool can help pinpoint the exact cause by reading the codes and providing live data to analyze the sensor's performance.

4. Can I continue driving my BMW with the OBDII code P1156 active?

- It is not recommended to continue driving your BMW with this code active as it may lead to further damage to the engine and emissions system.

5. How do I repair the O2 Sensor Heater Circuit Low Voltage Bank 2 Sensor 2 issue in my BMW?

- The repair typically involves replacing the faulty O2 sensor, checking and repairing any damaged wiring or connectors, and resetting the fault codes.

6. Are there any DIY tips for fixing the OBDII code P1156 in a BMW?

- While some basic troubleshooting like checking the sensor connections can be done by DIY enthusiasts, it is advisable to seek professional help for accurate diagnosis and repair.

7. How much does it cost to repair the O2 Sensor Heater Circuit Low Voltage issue in a BMW?

- The repair cost can vary depending on the extent of the damage and whether you choose to fix it yourself or take it to a mechanic. It may range from $100 to $300 or more.

8. Can a faulty O2 sensor cause other issues in my BMW besides triggering the P1156 code?

- Yes, a faulty O2 sensor can impact fuel efficiency, emissions, and overall engine performance, so it is crucial to address the issue promptly.

9. Will resetting the fault codes make the OBDII code P1156 go away permanently?

- Resetting the fault codes may temporarily clear the code, but if the underlying issue is not fixed, the code is likely to reappear.

10. Is it necessary to replace the O2 sensor if the P1156 code is triggered in my BMW?

- In most cases, replacing the O2 sensor is the most effective way to resolve the OBDII code P1156 related to the O2 Sensor Heater Circuit Low Voltage Bank 2 Sensor 2.