Location of oxygen sensors

[jkcharacter]

Can anyone help me locate the oxygen sensors on a Mercedes vito w639?
I have the engine diagnostic light on and heard this is the most common reason.

Thanks in advance

 

[star]

The eml can come up for many reasons, not just the nox.

 

[jkcharacter]

The eml can come up for many reasons, not just the nox.

A garage plugged in a code reader and found no code ‍

 

[jkcharacter]

The eml can come up for many reasons, not just the nox.

When the van goes up an incline, the eml comes on. Any suggestions?

 

[Wighty]

Can anyone help me locate the oxygen sensors on a Mercedes vito w639?
I have the engine diagnostic light on and heard this is the most common reason.

Thanks in advance

Use this helpful tool to narrow down the fault buddy

 

[jkcharacter]

Use this helpful tool to narrow down the fault buddy
View attachment 75517

Yeah that’s how it feels, especially when a garage ecu reader can’t find a fault

 

[LostKiwi]

That would tend to suggest they are using a pretty basic code reader as if the light comes on there should be a recorded error.
Generic code readers may not pick up MB specific faults.

 

[jkcharacter]

That would tend to suggest they are using a pretty basic code reader as if the light comes on there should be a recorded error.
Generic code readers may not pick up MB specific faults.

He said the kit was worth about £1500 so guessing that’s not basic. So frustrating

 

[star]

Basic in terms of what a star system costs.

 

[jkcharacter]

Basic in terms of what a star system costs.

Wow! Really? I got a real basis one which showed a code for me of c0300. The ODI cost me £25. If one that cost £1500k can’t find a code then that’s worrying

 

[star]

Try £9,000 ish and £230 a month to keep it online, each.