Mass airflow algorithm error. Where else can I look.

[Nobby1968]

Hi guys.
Don’t like doing this on my first post but I’m at my whits end.
Right, I’ve done a search and nothing too helpful has come up. My issue is as title. I’ve fitted a new inter cooler to intake pipe as it was split and the error stayed. So I cleaned the MAF and this also fixed nothing. Bit he bullet and changed the MAF But to no avail. Does anybody have any idea where else to look? When I reset the fault it comes straight back, even with the engine off, just can’t get my head around it.
Thanks

 

[Craiglxviii]

What fault codes are coming up?

 

[mattkh]

When I reset the fault it comes straight back,

What are you using to read and reset the code.?

 

[Nobby1968]

P010106 is he fault code I’m getting no engine management light just a soft limp mode 3000k max rpm

 

[Nobby1968]

I’m using I carsoft MB2 to read and reset codes.

 

[Craiglxviii]

OP, have a read of this thread: https://forums.mercedesclub.org.uk/...r-1-has-a-malfunction-algorithm-fault.164292/

 

[Nobby1968]

OP, have a read of this thread: https://forums.mercedesclub.org.uk/...r-1-has-a-malfunction-algorithm-fault.164292/

Been through this one. Didnt help sorry.

 

[alexanderfoti]

As per the thread, is usually down to air leaks. Have you smoke tested the engine?

 

[Nobby1968]

As per the thread, is usually down to air leaks. Have you smoke tested the engine?

I haven’t. I’ll have to get some kit and try that. Thing that’s puzzling me is the fault code is there with engine off after it’s been reset. Surly the engine would have to run to generate the code?

 

[alexanderfoti]

yes, but are you cycling the ignition (off 10 seconds then on again) after erasing?

 

[Nobby1968]

yes, but are you cycling the ignition (off 10 seconds then on again) after erasing?

Me been thick..please explain..

 

[alexanderfoti]

Me been thick..please explain..

ignition on - erase codes - ignition off for 10 seconds, ignition on , scan again

 

[Nobby1968]

ignition on - erase codes - ignition off for 10 seconds, ignition on , scan again

Just tried it….same.

 

[alexanderfoti]

I'd try another tool then.

OR the MAF is reporting an airflow even when the engine isnt running.

Either way, you will probably need Xentry (star) to sort it properly without going round and round.

 

[Nobby1968]

I'd try another tool then.

OR the MAF is reporting an airflow even when the engine isnt running.

Either way, you will probably need Xentry (star) to sort it properly without going round and round.

That’s what I’m starting to think. Thanks for all the input.

 

[mersum1es]

I recently diagnosed one sprinter with similar fault, MAF gave error just after ingnition on. Reason was offset in boost sensor reading, even engine shut down, systm read pressure difference --> calculated there should be air flow ---> detected MAF is not giving reading --> concluded MAF fault. Only difference was there was intermittent boost failure if engine was running and revved (due to bad pressure sensor).

 

[mattkh]

I recently diagnosed one sprinter with similar fault, MAF gave error just after ingnition on. Reason was offset in boost sensor reading,

Where is this boost sensor located,,?

 

[mersum1es]

Depending on engine, but of course between turbo and intake manifold. Google will be your friend if you don't have WIS.