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Multiple codes triggered, possible short circuit? Vacuum issue?

2434 Views 11 Replies 4 Participants Last post by  43sqd
Hi folks

The following codes have all triggered at once:

P2009 Intake Manifold Runner Control Circuit Low Bank 1
P0112 Intake Air Temperature Circuit Low Input
P0100 Mass Air Flow (MAF) Circuit Malfunction
P0102 Mass air flow (MAF) sensor/volume air flow (VAF) sensor low input
P1102 Mass Air Flow Sensor In Range But Lower Than Expected
P0243 Turbocharger Wastegate Solenoid A Malfunction

Could it be a vacuum issue? I've check all hoses visually and cannot see any cracks, they all appear to be in good condition. None appear to be dislodged.

Any ideas what it could be or anything I can do to test?

1 - 4 of 12 Posts

It helps greatly to know what year and engine you are asking questions about.
Also include miles/KMs and your general location.
Include any recent maintenance and events leading to your post.
Sometimes things happen suddenly, sometimes there may have been clues.
That helps.
W164 is the designation.
2006 320 CDI
Miles on vehicle?
Does the vehicle run now?
Battery voltage at rest, engine off.
Battery voltage engine on.
Any blown fuses? First place to look is box under hood.

Researched the P1102 and it looks like A) check to confirm all connections are OK, B) check air filters to see if they need replacing, C) either clean the MAF's or replace them. I had one fail on my '08 320 ML and while the vehicle ran OK it guzzled fuel. I also think the CEL was on, but it was several years ago. In that case the dealer replaced the air snorkel which included the two MAF's.
It is normal for it to look like that. That small tube is the crankcase vent and the electric valve with the orange seal is a heater.
If it was loose like the picture it is a likely suspect.
There is another orange seal, larger, at the turbo inlet. Both of these get soft over time. I replace mine every 20,000 mikes or so.
New ones fit tightly.

1 - 4 of 12 Posts
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