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ChuckF

Conflicting 2B22 Code: Misfire or Throttle Body Issue?

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?

Summary of the thread

A 2011 BMW X5 50i is experiencing issues with the check engine light, unsteady engine performance, and jerking during acceleration. The 2B22 code suggests either multiple misfires related to the fuel management system or a throttle body actuator issue on bank 2. Initial steps include inspecting and cleaning the throttle body actuator on bank 2, checking the high-pressure fuel pump, and verifying fuel pressure readings with a mechanical gauge. If the problem persists, further investigation into the low-pressure fuel pump or relay is recommended, although locating the relay has proven challenging.

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7 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 (community.author)

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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

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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!

MacDaz

Hello, My CARLY indicates the code 002DD6 (VALVETRONIC short circuit or open circuit) on my 2011 BMW 135i E82. Could you tell me the diagnostic steps before a possible replacement of the VALVETRONIC? Thank you in advance for your reply. Sincerely, Nicolas.

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CarlyMechanic

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Hello, My CARLY indicates the code 002DD6 (VALVETRONIC short circuit or open circuit) on my 2011 BMW 135i E82. Could you tell me the diagnostic steps before a possible replacement of the VALVETRONIC? Thank you in advance for your reply. Sincerely, Nicolas.

Start by checking the wiring and connectors related to the VALVETRONIC system for any signs of damage, corrosion, or loose connections. Ensure all connections are secure and intact. If the wiring appears fine, you can test the VALVETRONIC motor with a multimeter to check for continuity, which can help identify if there's an open or short circuit. If you need further assistance, feel free to ask!

ChuckF (community.author)

community_quotation:

community_author_wrote_on

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!

So it's quite a bit later, but I first replaced the hpfp then the sensor. Still 0 pressure on bank 1. But then I realized that bank 2 was essentially 0. The value shown for bank 2 was in hPa, and not in mPa. So its either the low pressure fuel pump or the relay. But I can't find the relay in any place in the car I read about. Want to check that first obviously.

CarlyMechanic

community_quotation:

community_author_wrote_on

So it's quite a bit later, but I first replaced the hpfp then the sensor. Still 0 pressure on bank 1. But then I realized that bank 2 was essentially 0. The value shown for bank 2 was in hPa, and not in mPa. So its either the low pressure fuel pump or the relay. But I can't find the relay in any place in the car I read about. Want to check that first obviously.

Check the fuse box diagram in your owner's manual to locate the fuel pump relay. It's often found in the rear trunk area or under the glove box. If you can't find it, consider consulting a repair manual specific to your model or contacting a BMW dealership for guidance. Let me know if you need more help!

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BMW

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X5