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ChuckF

Conflicting 2B22 Code: Misfire or Throttle Body Issue?

Check engine light on

|

Unsteady engine

|

Jerking on acceleration

I have a 2011 BMW X5 50i with 175,000 km, and I'm experiencing several issues: the check engine light is on, the engine runs unsteadily, and there's jerking during acceleration. When I scanned the car with Carly, I got a 2B22 code indicating multiple misfires related to the fuel management system. The freeze frame shows fuel pressure on bank 2 at 171hPa, while bank 1 averages 0. I initially thought it might be a faulty sensor or a bad high-pressure fuel pump (HPFP). However, when I researched the 2B22 code, it suggests a throttle body actuator issue on bank 2. I'm confused about these conflicting indications. Could anyone help clarify what's going on and suggest a course of action?

3 comment(s)


CarlyMechanic

Start by inspecting the throttle body actuator on bank 2 for any signs of damage or malfunction, as the 2B22 code suggests. Clean the throttle body to ensure it's not sticking due to carbon buildup. If the issue persists, consider checking the high-pressure fuel pump and fuel injectors for proper operation, as they can also cause misfires and jerking. Let us know how it goes or if you have further questions!

ChuckF (Author)

@CarlyMechanic

Start by inspecting the throttle body actuator on bank 2 for any signs of damage or malfunction, as the 2B22 code suggests. Clean the throttle body to ensure it's not sticking due to carbon buildup. If the issue persists, consider checking the high-pressure fuel pump and fuel injectors for proper operation, as they can also cause misfires and jerking. Let us know how it goes or if you have further questions!

Thank you, I will give that a whirl first. It is strange because also it gives the freezeframe for the high pressure fuel pumps, the bank 1 hpfp reading 0. I guess it is a glitch in the app. The information given is completely (I assume) unrelated to the code given. Wrong bank even. Do you think that the bank 1 hpfp is actually at 0 pressure?

CarlyMechanic

@ChuckF

Thank you, I will give that a whirl first. It is strange because also it gives the freezeframe for the high pressure fuel pumps, the bank 1 hpfp reading 0. I guess it is a glitch in the app. The information given is completely (I assume) unrelated to the code given. Wrong bank even. Do you think that the bank 1 hpfp is actually at 0 pressure?

It's possible that the reading of 0 pressure on bank 1 could indicate an issue with the high-pressure fuel pump or a sensor malfunction. To verify, you can manually check the fuel pressure using a mechanical gauge to ensure accurate readings. If the pressure is indeed at 0, it could be a sign of a failing pump or a blockage in the fuel line. Addressing this promptly is important, as it can affect engine performance and safety. Let us know what you find or if you have more questions!

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