P0155 BMW Code - O2 Sensor Heater Circuit Bank 2 Sensor 1
Quick Answer
Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1, Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit fuse, Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 harness is open shorted to ground. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P0155 BMW indicates O2 Sensor Heater Circuit Bank 2 Sensor 1.
- Common causes
- Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1, Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit fuse, Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 harness is open shorted to ground.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code P0155 BMW Description
What are the Possible Causes of the DTC P0155 BMW?
- Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1
- Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit fuse
- Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 harness is open shorted to ground
- Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0155 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0155 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.
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Frequently Asked Questions about P0155 BMW Code
1. What does the OBDII code P0155 BMW mean?
- The code P0155 BMW refers to an issue with the O2 sensor heater circuit for Bank 2 Sensor 1 in the vehicle's exhaust system.
2. What are the common symptoms of a P0155 BMW code?
- Common symptoms of a P0155 BMW code may include poor fuel economy, rough idling, decreased engine performance, and an illuminated check engine light.
3. What are the potential causes of a P0155 BMW code?
- Potential causes of a P0155 BMW code include a faulty O2 sensor, damaged wiring or connectors in the heater circuit, a blown fuse, or a problem with the vehicle's engine control module (ECM).
4. How can I diagnose a P0155 BMW code?
- Diagnosing a P0155 BMW code typically involves using an OBDII scanner to retrieve the code, inspecting the O2 sensor and related wiring for damage, checking the fuse for the heater circuit, and testing the ECM for proper functionality.
5. Can I continue driving with a P0155 BMW code?
- It is not recommended to continue driving with a P0155 BMW code, as it can lead to decreased fuel efficiency and potential damage to the vehicle's engine over time.
6. How can I repair a P0155 BMW code?
- Repairing a P0155 BMW code may involve replacing the Bank 2 Sensor 1 O2 sensor, repairing damaged wiring or connectors, replacing a blown fuse, or reprogramming the ECM if necessary.
7. Are there any DIY tips for fixing a P0155 BMW code?
- DIY tips for fixing a P0155 BMW code include checking the fuse for the O2 sensor heater circuit, inspecting the wiring and connectors for damage, and ensuring proper connection to the ECM before considering sensor replacement.
8. How much does it cost to repair a P0155 BMW code?
- The cost to repair a P0155 BMW code can vary depending on the cause of the issue, but it may range from around $100 to $300 for parts and labor.
9. Can a P0155 BMW code cause emissions issues?
- Yes, a P0155 BMW code can cause emissions issues due to the O2 sensor not functioning properly, leading to increased emissions from the vehicle.
10. How long does it take to repair a P0155 BMW code?
- The repair time for a P0155 BMW code can vary depending on the cause and complexity of the issue, but it typically takes a few hours to diagnose and fix the problem.
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