2006 XC70 LTFT problems (ECM212C and ECM21EC) Topic is solved

[ortho stice]

This weekend I put 400 miles on the car without any sign of the LTFT code. I checked trims today and VIDA was reporting around 1% which seems like a significant improvement. The ECM had two pending codes for MAF flow, this time saying it was too high! The idle reading is still showing 12.5 kg/h so I'll see if those ever make it to CEL territory.

So, conclusions? Not sure, but it seems possible that the NTK MAF was throwing something off, specifically under acceleration. For now I'm considering this issue resolved.

I have a big service planned for June; the timing belt will be due, I'll probably due the PCV system as there is some oil collecting around the coils next to the PCV hose, and I'll replace the O2 sensors of unknown age with new OEM. Other than the radiator replacement, this car has needed very little to be ready for daily usage, $1900 well spent!

[Anthony113]

That's definitely on the agenda and I can see how that could impact things. Any reason to worry about the low indicated flow through the MAF at idle?

Vacuum leak. Smoke the intake. Pay extra attention to the vicinity of PTC (PCV long heated pipe/hose ends there by the turbo).

What part number is on MAF. Should be Volvo original or Bosch

https://www.fcpeuro.com/products/volvo- ... 0-31342414

https://www.fcpeuro.com/products/volvo- ... 0280218088 poor bunny Check the part number.

Exactly the information I needed, thanks a lot!