Hey guys I could use your help:
2004 Audi TT 1.8T 225hp BEA Quattro, 6spd manual & 65k miles
So the car exhibits no symptoms but I have these 4 CELs that I can't get rid of:
-P1297 Pressure Drop between turbo valve and throttle body (Check DV!)
-P0420 Catalytic system efficiency below threshold (running lean)
-P0300 intermittent misfires all cylinders
-P0303 misfire cylinder 3
Here's a list of what I've tried so far:
-Replaced valve cover gasket & spark plugs
-Replaced coil on cylinder #3
-Replaced diverter, N75, and pressure control valves
-Replaced hose from N75 valve to turbo charge air pipe
-Smoke test, nothing found
-Deleted N249 system
-Replaced fuel pressure regulator hose + hose from diverter valve to charge pipe
-Cleaned and aligned throttle body
-Smoke test, nothing found
I'm kind of at my wit's end with this. I think all codes tie back to the first one and that there's an air leak. Like I said the car runs fine but I can't get this CEL to stay away
One more tidbit: The rate at which the CEL comes on varies... If I'm doing city driving it will come on ~50-80kms after clearing it. However if I'm driving more highway it takes much longer, usually 200kms+. Currently at 250kms without the CEL on but I know it'll appear shortly. Also only the catalytic converter CEL appears on my regular OBD scanner but I see the other 3 when I use the VCDS VAG-COM.
Any advice??
2004 Audi TT 1.8T 225hp BEA Quattro, 6spd manual & 65k miles
So the car exhibits no symptoms but I have these 4 CELs that I can't get rid of:
-P1297 Pressure Drop between turbo valve and throttle body (Check DV!)
-P0420 Catalytic system efficiency below threshold (running lean)
-P0300 intermittent misfires all cylinders
-P0303 misfire cylinder 3
Here's a list of what I've tried so far:
-Replaced valve cover gasket & spark plugs
-Replaced coil on cylinder #3
-Replaced diverter, N75, and pressure control valves
-Replaced hose from N75 valve to turbo charge air pipe
-Smoke test, nothing found
-Deleted N249 system
-Replaced fuel pressure regulator hose + hose from diverter valve to charge pipe
-Cleaned and aligned throttle body
-Smoke test, nothing found
I'm kind of at my wit's end with this. I think all codes tie back to the first one and that there's an air leak. Like I said the car runs fine but I can't get this CEL to stay away
One more tidbit: The rate at which the CEL comes on varies... If I'm doing city driving it will come on ~50-80kms after clearing it. However if I'm driving more highway it takes much longer, usually 200kms+. Currently at 250kms without the CEL on but I know it'll appear shortly. Also only the catalytic converter CEL appears on my regular OBD scanner but I see the other 3 when I use the VCDS VAG-COM.
Any advice??
