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right my mate put my 2.0 8 valve gti on vag com yesterday and it came up with 4 faults and the only one to do with the engine is this

VCDS-Lite Version: Release 1.0

Control Module Part Number: 06A 906 018 EF

Component and/or Version: 2.0l R4/2V MOTR HS V04

Software Coding: 00031

Work Shop Code: WSC 00028

4 Faults Found:

16518 - Oxygen (Lambda) Sensor B1 S1: No Activity

P0134 - 35-10 - - - Intermittent

17990 - Idle Adaptation Limit Reached

P1582 - 35-10 - - - Intermittent

16556 - Fuel Trim; Bank 1: System Too Rich

P0172 - 35-10 - - - Intermittent

17978 - Engine Start Blocked by Immobilizer

P1570 - 35-10 - - - Intermittent

so my mate said humour me before you put a new front lamba on it put this stuff in

http://www.cataclean.com/index.html

so i did and followed the instructions on the bottle and omg my average mpg on the motorway was 20.9 mpg before i put in cataclean in. and as soon as it went in and started working through the system my average went up to 34.6 mpg at 80 mph and its now returning on my average mpg 28.6 mpg around town. where as before i was averaging 13.9 mpg. so to say i am stunned is a understatement. even if i do have to put a front lamba in it i know this stuff aint gonna have done no harm. wot do you guys think?
 
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