Hi Everyone,

Recently I bought a MB B200 Auto 2015 model from an auction.
On driving back home, I observed low engine power, and upon reaching home while checking for any OBD2 scan codes, it threw me the following. Out of which, I believe P029921 is the main reason I am getting low engine power.
Can anyone please advise which could be the reason for it? Is it the whole Turbo assembly or just a part of it? I checked for any vacuum leaks but couldn't find any (I may be wrong!).
Thanks in advance for your support.
Cheers
Mayank


OBD2 code:
Car Scanner ELM OBD2
Version: 1.104.0/1.104.0/iOS
DTC report
Connection profile: Mercedes-Benz OBD-II / EOBDDate: 17/02/2024 8:52:16 AM
============================
OBD-IIOBD-II
DTCs: 5
----------------------------
P2637(97) [0x263797] Archive (inactive)
Torque management, feedback signal A - malfunction
Status: Confirmed
----------------------------
P0299(21) [0x029921]
Turbocharger (TC)/supercharger (SC) - low boost
Status: Pending, Test failed since last DTC clear, Test not completed during this operation cycle
----------------------------
P0563(00) [0x056300] Archive (inactive)
System voltage - high
System Voltage High
Status: Test failed since last DTC clear
----------------------------
P0562(00) [0x056200] Archive (inactive)
System voltage - low
System Voltage Low
Status: Test failed since last DTC clear
----------------------------
P060A(00) [0x060A00] Archive (inactive)
Engine control module (ECM), monitoring processor performance problem
Status: Test failed since last DTC clear
============================
Engine control unitEngine control unit
DTCs: 2
----------------------------
P0299(21) [0x029921]
Turbocharger (TC)/supercharger (SC) - low boost
Status: Pending, Test failed since last DTC clear, Test not completed during this operation cycle
----------------------------
P0563(00) [0x056300] Archive (inactive)
System voltage - high
System Voltage High
Status: Test failed since last DTC clear
============================
Transmission control unitTransmission control unit
DTCs: 3
----------------------------
P0562(00) [0x056200] Archive (inactive)
System voltage - low
System Voltage Low
Status: Test failed since last DTC clear
----------------------------
P060A(00) [0x060A00] Archive (inactive)
Engine control module (ECM), monitoring processor performance problem
Status: Test failed since last DTC clear
----------------------------
P2637(97) [0x263797] Archive (inactive)
Torque management, feedback signal A - malfunction
Status: Confirmed, Test failed since last DTC clear
============================
ABS control unit
No DTC found.
============================
SteeringSteering
DTCs: 1
----------------------------
U0100(87) [0xC10087] Archive (inactive)
Data bus, engine control module (ECM) A - no communication
Lost Communication with ECM/PCM A
Status: Test failed since last DTC clear

 

Have you seen this? Not the same car, but the same code and symptoms from the sounds of it.

 

I suspect the same- Wastegate actuator is a very common issue in these engines especially in a warmer environment- its summer here in Australia.
also, when i tracing the part number written on existing wastegate actuator it appears that its an aftermarket replaced part. Tomorrow/dayafter i will try to actuate it by vacuuming externally and will update.

Much appreciate for your support mate!
cheers

 

I tested the wastegate actuator using vacuum hand pump- no issues
i tested the solenoid and it was Normally Open all the times. Cleaned using pressurised air and put it back- started working all good!
finally the Wastegate actuator is in sync with rpm.

 

Do you know what caused it?

 

Not 100% sure but could be a struck solenoid!