Ginga52

P0171 - P0174 - P0300

Hello, i get these codes when I scan the ECU

171 & 174 right and left bank low density
300 random misfires

the only two things i can think of which changed recently in the car configuration are that I added a small quantity of fuel additive (Lucas) to clean the injectors and fuel system, or there is an issue with the APR ECU upgrade stage 1 (318hp chipped with 93 octane). However I get the codes when the program is running stock mode...

I also replaced the sparkplugs with NGK but i don't this has anything to do with 171 and 174

any clues?

car is 01 allroad 2.7tt Tip (APR ECU but otherwise the rest is stock)

Thanks in advance!

quickaudi:STFA

looked them up on ross-tech's website yet?

Ginga52

i'm going to get the hex-can interface... thanks...

in the meantime any ideas what the problem is? Bad PCV? vaccuum leak?

on both sides, and that would cause random misfires?

cheers,

quickaudi:STFA

you can look up your own codes in this link

http://dtcsearch.planetvag.com/default.aspx

Ginga52

yeah i have a generic obd2 reader that gave me the codes but no way to read any blocks. I just bought the hex-can interface form a R-T distributor so I am awaiting delivery by Monday.

In the meantime I have tighten all vaccuum hose connections with new clamps, and went at a scrap yard and got a used MAF sensor from a '02 Allroad. I will replace it and see if that solves my problem....

quickaudi:STFA

make sure to clean the MAF well first

Ginga52

what do you clean it with? what's acceptable if i don';t have specialized MAF cleaner?

quickaudi:STFA

electronics cleaner should work fine

Ginga52

with vag-com i get 10 faults with the engine block codes

16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-00 - -
16685 - Cylinder 1: Misfire Detected
P0301 - 35-00 - -
16687 - Cylinder 3: Misfire Detected
P0303 - 35-00 - -
16686 - Cylinder 2: Misfire Detected
P0302 - 35-00 - -
17536 - Fuel Trim; Bank 1 (Mult): System too Lean
P1128 - 35-00 - -
17538 - Fuel Trim; Bank 2 (Mult): System too Lean
P1130 - 35-00 - -
17862 - Exhaust Gas Temp Sensor 1 (G235): Short to Ground
P1454 - 35-10 - - - Intermittent
16688 - Cylinder 4: Misfire Detected
P0304 - 35-00 - -
16690 - Cylinder 6: Misfire Detected
P0306 - 35-00 - -
16689 - Cylinder 5: Misfire Detected
P0305 - 35-00 - -

when I read blocks 32-33 i get 25% (max in range) on both trims/sides...

i have not replaced the MAF yet but based on your experience does this point to a MAF issue?

quickaudi:STFA

could very well point to a MAF issue

what happens when you clear them - which ones come back?