E-Class Coupe (C207) & Cabrio (A207) 2010-: E250CDI Coupe, E350 Coupe, E350CDI Coupe, E500 Coupe, E550 Coupe [Coupes & Cabriolets]

E550 Error P069704 // P222D12

Old Feb 27, 2025 | 02:09 PM
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frank74's Avatar
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E550
E550 Error P069704 // P222D12

Hello,
i have a E550 214 207 Coupe with M278 Motor.
Engine will crank but dont fire up.
Error Codes P069704 "Output 3 for the reference voltage of the sensors has an electrical fault or an open circuit. There is an internal fault
Error Code P222D12
Error Code P227D12

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Old Mar 2, 2025 | 08:08 PM
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Chevota's Avatar
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E550 Coupe 2wd (2016)
I'd clear the codes and/or disconnect the battery overnight to see if that changes anything.
Fyi I get the open or shorted faults all the time, yet nothing is actually wrong. Even the dealer told me new cars have those all the time and to just ignore them. I believe the translation is they don't don't know why, or how to fix it.

I would assume none of those codes would prevent it from starting, but who knows. So clear/reset and report what happens.
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