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[polilara]

Hello all

I was driving normally 80 km/hour when I realized that the MIL orange light is on. I drove home and started the car couple of times, the light remained on. With pedal trick I found codes 170 and 173; Fuel trim malfunction bank 1 and bank 2. What does this mean. Which parts I have to replace ? The car seems to work normally, however.

[Proz]

Hi there
I had the P0170 code as well a while ago .
You really need the live data looking at to see what Maf is reporting etc .

In my case it was the Maf at fault but please dont change it till you know whats wrong 

[polilara]

Thanks for comments, I believe that it really can be the MAF. Actually I checked my earlier questions here and found that this happened first time in Aug. 2010. I have about 150 000 km behind so perhaps that is the time MAF will last.

[feeutfo]

Unless there is an air leak of some sort, but otherwise Maf usually.

[polilara]

Just for info..

I erased the fault codes and changed the MAF (original Bosch 0281002184). No error codes seen after that. What I see is that the fuel consumtion is slightly lower than earlier. Engine also seems to start easier and "softly" without rattling during first seconds like it did earlier.

[Kneepad]

Good result.   

Nice to get feedback on the result of your work.