Trying to help a mate sort out the poor running of his 1.8T AUM MK4. It feels very flat to drive and has hardly any power, a quick VAG COM scan has shown to error codes: Control Module Part Number: 06A 906 032 DR Component and/or Version: 1.8L R4/5VT G 0002 Software Coding: 11500 Work Shop Code: WSC 00153 2 Faults Found: 16487 - Mass Air Flow Sensor (G70): Signal too High P0103 - 35-10 - - - Intermittent 17705 - Shareware Version. To Decode all DTCs P1297 - 35-00 - Please Register/Activate Car is running a Forge DV already and i have checked all hoses and they seem ok. I have also done some logs in VAG COM and at 6K revs and 35.3% of throttle the MAF is showing 60.03g/s. In the past the wiring to the MAF has been repplaced as well as a exchange MAF from the dealers. After a quick poke at the MAF the air flow figures at idle are down at 22.6g/s but it is still throwing a 16487 code all the time. I am going to run a throttle body alignment, anyone get any other suggestions ? Cheers, Jamie.
17705 is to do with the n75 vale. check the hoses are not leaking any where. And there is a test you can do on its electrical side. the n75 unplugged should be about 25-35 ohms across the n75 connections, and the plug disconected it should see about 11-14volts on the plug at idle. if the n75 is not working properly it will be flat as described.
Thanks for the reply. Will check the n75 valve when i see the car next weekend, ordered an replacment MAF for it being as the air flow at idle being recorded is way too high. Did make a bit more progress last sunday, managed to get hold of a registered copy of VAG COM and after running a throttle body adaption it has a bit more power and isn't completly flat
Mass Air Flow Sensor (G70): Signal too High Right had a look at this at car again this weekend. Checked the resistence of the N75 vale and it was around 28.3 Ohms on my multi meter. Fitted a new exchange MAF and reset the ECU by disconnecting the battery, and the car ran great had a read of 2.5-3 g/s in VAG COM whilst logging the MAF at Idle. After a run we left the car to cool and went back out to it with the engine cold, and it will start and idel for a while and then revs will drop and it will either catch itself or cut out full stop. If it caths itself it then throws Mass Air Flow Sensor (G70): Signal too High error code, and if you look in VAG COM the air flow recorded at idel is now at 17 g/s. How come all of a sudden the MAF is recording more air flow, if you disconnet the battery for 5 minutes the air flow readings return to normal. Anyone got any ideas
