[SOLVED] P1151 Code: Lean Bank 2 – Fixing Upstream Heated Oxygen Sensor Switch

The automobile fault code P1151 indicates a problem with the upstream oxygen sensor in bank 2. This fault code can be caused by various factors, including high or low fuel pressure, a dirty or defective MAF sensor, a vacuum leak on the engine, a leaking fuel injector or fuel pressure regulator, or a faulty Powertrain Control Module (PCM).

To fix this issue, it is recommended to check the possible causes mentioned above and visually inspect the wiring harness and connectors for any damage. Look out for broken, bent, pushed out, or corroded connector pins. The repair time for this fault code is estimated to be around 1.0.

It is important to address this issue promptly to ensure optimal performance and efficiency of your vehicle.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level6.67 (Out of 10)

Experiencing rough idling, decreased fuel efficiency, and potential stalling? Check out the symptoms of fault code p1151 below.

  • The symptoms of the automobile fault code P1151 include rough idle, hesitation or stumbling during acceleration, poor fuel economy, engine misfire, and the check engine light being illuminated.

The automobile fault code p1151 can be caused by a faulty upstream oxygen sensor, fuel pressure issues, a dirty or defective MAF sensor, a vacuum leak, a leaking fuel injector or pressure regulator, or a faulty PCM.

  • The fault code P1151 can be caused by several factors, including a faulty upstream oxygen sensor in bank 2, high or low fuel pressure, a dirty or defective MAF sensor, a vacuum leak on the engine, a leaking fuel injector or fuel pressure regulator, and a faulty Powertrain Control Module (PCM).

To fix the p1151 fault code, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.

  • To fix the automobile fault code P1151, start by checking the possible causes mentioned above.
  • Then, visually inspect the wiring harness and connectors related to the issue.
  • Look for any damaged components and check if there are any broken, bent, pushed out, or corroded pins in the connectors.
  • This fix is estimated to take approximately 1.0 hour.

The factors influencing the diagnosis and fixing cost of the automobile fault code p1151 are the estimated repair time and the hourly rate charged by auto repair shops. The estimated repair time for this fault code is 1.0 hour. Auto repair shops typically charge between $75 and $150 per hour for their services.

These factors will determine the overall cost of diagnosing and fixing the p1151 fault code.

When you see the Engine Light ON or the Service Engine Soon Warning Light, it could be due to the fault code P1151. This code indicates a problem with the oxygen sensor on bank 2, which is typically found on the side of the engine opposite the cylinder number one.

The oxygen sensor is responsible for measuring the oxygen content in the exhaust gases and providing feedback to the engine control module. A P1151 code suggests that the oxygen sensor on bank 2 is not functioning properly, which can lead to issues with fuel efficiency and emissions. It is important to address this issue promptly to ensure optimal engine performance and to prevent further damage to the vehicle’s components.

What are the possible causes of fault code P1151 in an automobile?

If you’re seeing fault code P1151 in your automobile, it could be due to a few different causes. One possibility is a faulty upstream oxygen sensor in Bank 2. Another potential cause could be high or low fuel pressure. A dirty or defective MAF sensor, a vacuum leak on the engine, or a leaking fuel injector or fuel pressure regulator could also be to blame. Lastly, a faulty Powertrain Control Module (PCM) could be causing the issue. To fix the problem, start by checking the possible causes mentioned above. Take a close look at the wiring harness and connectors, inspect for any damage, and check for broken, bent, pushed out, or corroded connector pins.

How can I visually inspect the wiring harness and connectors to fix fault code P1151?

To fix fault code P1151, start by visually inspecting the wiring harness and connectors. Check for any damaged components and look for broken, bent, pushed out, or corroded connector pins. This will help identify any issues with the upstream oxygen sensor bank 2, fuel pressure, MAF sensor, vacuum leaks, leaking fuel injector, or faulty Powertrain Control Module (PCM). Don’t forget to also check the “Possible Causes” listed above for a comprehensive solution.

What should I look for when checking for damaged components and corroded connector pins to resolve fault code P1151?

To resolve fault code P1151, start by checking for damaged components and corroded connector pins. This can be done by visually inspecting the related wiring harness and connectors. Look for any broken, bent, pushed out, or corroded pins. Additionally, check the possible causes listed, such as a faulty upstream oxygen sensor, high or low fuel pressure, a dirty or defective MAF sensor, a vacuum leak on the engine, a leaking fuel injector, or a faulty Powertrain Control Module (PCM).

p1151 error fault code explained

To fix the P1151 fault code, start by checking the possible causes: a faulty upstream oxygen sensor in Bank 2, high or low fuel pressure, a dirty or defective MAF sensor, a vacuum leak on the engine, a leaking fuel injector or fuel pressure regulator, or a faulty Powertrain Control Module (PCM). Visually inspect the wiring harness and connectors for any damage, and check for broken, bent, pushed out, or corroded connector pins.

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