TT 01 18 14
Service Bulletin Details
Public Details for: TT 01 18 14
Alternative diagnosis for lean fuel trim.
- 2018 - 2017 - 2016 - 2015 - 2014 - 2013 -
Models from 2018
| 2018 VOLKSWAGEN BEETLE |
| 2018 VOLKSWAGEN BEETLE CONVERTIBLE |
| 2018 VOLKSWAGEN GOLF |
| 2018 VOLKSWAGEN JETTA |
| 2018 VOLKSWAGEN PASSAT |
Models from 2017
| 2017 VOLKSWAGEN BEETLE |
| 2017 VOLKSWAGEN BEETLE CONVERTIBLE |
| 2017 VOLKSWAGEN GOLF |
| 2017 VOLKSWAGEN JETTA |
| 2017 VOLKSWAGEN PASSAT |
Models from 2016
| 2016 VOLKSWAGEN BEETLE |
| 2016 VOLKSWAGEN BEETLE CONVERTIBLE |
| 2016 VOLKSWAGEN GOLF |
| 2016 VOLKSWAGEN JETTA |
| 2016 VOLKSWAGEN PASSAT |
Models from 2015
| 2015 VOLKSWAGEN BEETLE |
| 2015 VOLKSWAGEN BEETLE CONVERTIBLE |
| 2015 VOLKSWAGEN GOLF |
| 2015 VOLKSWAGEN JETTA |
| 2015 VOLKSWAGEN PASSAT |
Models from 2014
| 2014 VOLKSWAGEN BEETLE |
| 2014 VOLKSWAGEN BEETLE CONVERTIBLE |
| 2014 VOLKSWAGEN GOLF |
| 2014 VOLKSWAGEN JETTA |
| 2014 VOLKSWAGEN JETTA SPORTWAGEN |
| 2014 VOLKSWAGEN PASSAT |
Models from 2013
| 2013 VOLKSWAGEN BEETLE |
| 2013 VOLKSWAGEN BEETLE CONVERTIBLE |
| 2013 VOLKSWAGEN GOLF |
| 2013 VOLKSWAGEN JETTA |
| 2013 VOLKSWAGEN JETTA SPORTWAGEN |
| 2013 VOLKSWAGEN PASSAT |
Technical Tips Technical Tip Topic 01-18-14TT – Fuel Trim Lean Faults Resulting from Unmetered Air Market area United States 444 Volkswagen of America, Inc. (6444) Brand Volkswagen Date Novermber 9, 2018 Condition ATTENTION: THIS IS A TECH TIP, NOT A TECHNICAL BULLETIN. TECH TIPS ARE NOT ASSOCIATED WITH WARRANTY CLAIMING. Fuel Trim Lean Faults Resulting from Unmetered Air Model(s) Jetta, Passat, Golf, Beetle, Beetle Convertible Year Eng. Code Trans. Code VIN Range From VIN Range To All All All 2.0L 2013-2018 CPPA, CPLA, CPRA,CPKA,CXBA, CXBB, CXCA, CXCB Technical Background Lean operating conditions/fuel trims. In cases where the fuel trims demonstrate a lean operating condition and no issues have been found with fuel delivery/quality, sensor operation, vacuum leaks or camshaft timing, there may be excessive crankcase vacuum with corresponding low intake vacuum. Service Remove the Map sensor and attach a vacuum gauge to monitor intake vacuum. Engine should have 18-20” of vacuum at idle (@ sea level). If intake vacuum is too low: Remove valve cover to inspect for missing sealing (freeze plug) plugs in cylinder head. If missing: Replace sealing plugs. Reference ETKA for the necessary part(s). Please see the figures below. 1 Technical Tips Figure 1 Figure 2 2 Technical Tips Additional Information Revision History Revision Number Released Date Reason For Update 2052930/1 11/9/18 Original publication. © 2018 Volkswagen Group of America, Inc. All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Volkswagen Group of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the publisher. 3