Ml250 W166 NoX sensor fault code P2201

S20TYA

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Hi I only picked up my 2012 Ml 2 weeks ago and while my wife was driving the Engine Management light came on, I phoned the garage where I purchased it from and they told me to phone the AA, they came out and checked the fault as a P2201 NoX sensor circuit range/Performance bank 1, he cleared the fault but told me to take it to be checked. Has anyone has this fault before thanks
 

Steve@Avantgarde

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Yes, you need to check them on STAR, have to be careful as there are a few software updates and DPF regens to do to combat this fault as well as wiring mods and updated sensors. May not be straightforward
 

mattkh

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..... the AA, they came out and checked the fault as a P2201 NoX sensor circuit range/Performance bank 1, he cleared the fault. thanks
How soon did the EML light come back on.
 

star

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You may have to replace both with modified Nox sensors, software update and changing of the data card.
 

fabes

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Had the same code on mine and it was a NOX sensor
As both garages above state, needs a STAR hook up.

Mine needed a Star session to identify the exact sensor, then MBS changed it and (I presume) coded it in.

Cost a few quid mind.....
 

jjp35

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Yes, you need to check them on STAR, have to be careful as there are a few software updates and DPF regens to do to combat this fault as well as wiring mods and updated sensors. May not be straightforward

I have similar problem

On my 2012 ML250, I had Refill Ad Blue alert, filled tank with 20 litre Adblue then the " No Engine start XXX miles" sign came up. EML light is on.

The Diagnosis with icarsoft MB V2.0 shows,

Current Fault code P13E400 -Remaining Driving distance limited due to Malfunction in Adblue system"

Any idea what this could be and how much will it cost to repair?
Do you have mobile diagnostic service?
 

ajlsl600

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is it a system malfunction? or benz cxxxy sensors malfunction, reading with interest as suspect this will come my way at some point. and if wiring requires replacement should that not be a benz problem as it cant have been any good from new esp if the whole thing needs changing/updating.
 

Steve@Avantgarde

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I have similar problem

On my 2012 ML250, I had Refill Ad Blue alert, filled tank with 20 litre Adblue then the " No Engine start XXX miles" sign came up. EML light is on.

The Diagnosis with icarsoft MB V2.0 shows,

Current Fault code P13E400 -Remaining Driving distance limited due to Malfunction in Adblue system"

Any idea what this could be and how much will it cost to repair?
Do you have mobile diagnostic service?

I dont do mobile I'm sorry. If its just an update we charge £70+VAT, but check and update every system for that, not just the engine.
 

Steve@Avantgarde

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Thanks Steve,

Do you think system update will resolve the problem?

It depends on what the result of the guided fault finding will be. If your specialist has Xentry STAR online, it should lead them to the front door of the fault.
 

jjp35

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It depends on what the result of the guided fault finding will be. If your specialist has Xentry STAR online, it should lead them to the front door of the fault.
Thank you Steve for your help. You are quite far from Oprington otherwise I would have bought the car to you. Thanks again.
 

alexanderfoti

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Thank you Steve for your help. You are quite far from Oprington otherwise I would have bought the car to you. Thanks again.

You are quite close to us, we do pickup/drop off from Orpington and have online STAR and can sort your issue!
 

ajlsl600

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did OP get sorted ?
 

davemercedes

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Good to see another illustration of the effective brilliance of this forum!
 


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