Fault Code UO423
10-29-2023, 12:57 PM
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W166 ML250 AMG Bluetec
Fault Code UO423
Hello Folks just a recap been having trouble for sometime regarding the above mentioned fault code,aprox 6 months ago the icarsoft kept coming up with supercharger/turbo charger inop and it was, eventually removed Turbo Actuator, only stripped and cleaned as all fuse links were in tact and the only thing i could see was the circuit board where the wheel comes in contact with the board was contaminated with something ? could only be grease from the gear wheels i guess,cleaned with Contact Cleaner and reassembled
OK ran fine for aprox 8. weeks or more no trouble from actuator / tubo working fine but still getting UO423 fault code,and again it was taking out the Actuator,so i remember reading a Thread about a Sprinter fellow member stating he had replaced is Outside ambient tempeture sender so today i also done the same ?
And all is well,but i have driven this carfor 7. Years with this Sender stating the Tempeture was of +85 degrees
OK ran fine for aprox 8. weeks or more no trouble from actuator / tubo working fine but still getting UO423 fault code,and again it was taking out the Actuator,so i remember reading a Thread about a Sprinter fellow member stating he had replaced is Outside ambient tempeture sender so today i also done the same ?
And all is well,but i have driven this carfor 7. Years with this Sender stating the Tempeture was of +85 degrees
10-29-2023, 06:49 PM
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2015 SL400 (M276 Turbo), 2014 C350 Sport (M276 NA), 2004 SL500 (M113), 2004 Audi TT225 (BEA)
Sorry, but I have no idea what you are asking.
10-30-2023, 07:38 AM
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W166 ML250 AMG Bluetec
Hi thanks for the reply,what i was getting at, was the fact that the faulty ambient airr tempeture unit had been in the car for 7.years and only now is it causing a problem with the system,so i am not to sure of believing the Software ?
