P0299 - Turbocharger (TC)/supercharger (SC) - low boost

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Clayton1212

New Member
Joined
Jan 6, 2024
Messages
3
Location
Denmark
Car
A180 W176
Hi Guys

Happy Newyear ;)

My wife drives her Mercedes A180 W176 (2017 120.000km.) on the way to work, she has to pull into the emergency lane because it won't take gas.
She turns it off and on a few times and can drive home (without turbo pressure),
the engine light is on though!

I put my OBD2 tester on and get the following error codes:

Car Scanner ELM OBD2
Version: 1.101.9/401019/GP
DTC report
Connection profile: Mercedes-Benz OBD-II / EOBD + AT (CAN)Date: 1/6/2024 10:21:16 AM
VIN: WDD1760121J638488
============================
OBD-IIOBD-II
DTCs: 3
----------------------------
P0299 [0x0299]
Turbocharger (TC)/supercharger (SC) - low boost
Status: Confirmed
----------------------------
P247A [0x247A]
Exhaust gas temperature sensor 3, bank 1 - out of range
Status: Confirmed
----------------------------
U0401(86) [0xC40186] Archive (inactive)
Invalid data received - engine control module (ECM)
Status: Test failed since last DTC clear
============================
Engine control unitEngine control unit
DTCs: 5
----------------------------
P0638(77) [0x063877] Archive (inactive)
Throttle actuator control (TAC), bank 1 - range/performance problem
Status: Test failed since last DTC clear, Test not completed during this operation cycle
----------------------------
P0638(73) [0x063873] Archive (inactive)
Throttle actuator control (TAC), bank 1 - range/performance problem
Status: Test failed since last DTC clear
----------------------------
P1544(98) [0x154498] Archive (inactive)
Status: Confirmed, Test failed since last DTC clear
----------------------------
P2263(22) [0x226322]
Turbocharger (TC) boost pressure/supercharger (SC) boost pressure - performance problem
Status: Test failed, Pending, Confirmed, Test failed since last DTC clear, Test not completed during this operation cycle, Warning indicator requested
----------------------------
P148E(22) [0x148E22] Archive (inactive)
Status: Test failed since last DTC clear, Test not completed during this operation cycle
============================
Transmission control unit
No DTC found.
============================
ABS control unitABS control unit
DTCs: 1
----------------------------
C0734(00) [0x473400] Archive (inactive)
Status: Test failed since last DTC clear
============================
Steering


No DTC found.

I've searched and found it probably has something to do with the Throttle sensor, I've also checked the plugs/wires and hoses, nothing to see, do you have any experience with the above error codes?
and possibly Do you know where the throttle sensor is located?

Thank you in advance from Denmark ;)

Best Regards Morten
 
Come on guys, help me out here ;)

In Denmark it costs 230 pounds an hour at a Mercedes workshop, and they only have time in a week, so if I can fix it myself so my wife can get to work, would that be nice

I've been making cars for 30 years

BR Morten Clayton
 
Come on guys, help me out here ;)

In Denmark it costs 230 pounds an hour at a Mercedes workshop, and they only have time in a week, so if I can fix it myself so my wife can get to work, would that be nice

I've been making cars for 30 years

BR Morten Clayton
I can’t really help , but that’s a lot of codes , if you delete them all (as you have now made a note of them here ) do they all come back ?
Is the battery healthy and well charged ? I’m guessing the weather is pretty cold where you are now .
Do you have any sort of recovery call out that will come to your house and give their professional opinion of the fault ?
Some times a google search of the sensor you are looking for (or eBay or AUTODOC) will get you a picture of the sensor and that might help you find it ?
Good luck though .
 
Thanks, have now disassembled and reassembled the throttle, everything looks fine in relation to the throttle valve/motor/sensor, after I deleted the fault codes again they don't come back, test drive of 200 km. :)
 

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