SA-061-20a

Mazda North American Operations
Irvine, CA 92618-2922
Service Alert
Subject:
CHECK ENGINE LIGHT ON WITH P3400
Service Alert No.: SA-061/20
Last Issued: 09/10/2020
BULLETIN NOTES
This Service Alert supersedes the previously issued Service Alert(s) listed below: The changes are noted in
Red.
Previous Service Alert(s):
Date(s) Issued:
SA-061/20
08/05/2020
SA-015/19
05/20/19 and 04/08/19
APPLICABLE MODEL(S)/VINS
2018-2020 Mazda6
2018-2020 CX-5
2019-2020 Mazda3
2020 CX-30
DESCRIPTION
If you receive a customer concern about the CHECK IN light coming on and DTC P3400 (cylinder
deactivation system malfunction) stored, the cylinder deactivation oil control valve may be plugged with
plastic debris from the oil filter wrapper. The debris may enter the center of the oil filter when poking a hole
in the filter wrapper during removal, and then travel through the engine and plug the cylinder deactivation oil
control valve.
REPAIR PROCEDURE
1. Verify customer concern.
2. Remove the front and rear cylinder deactivation oil control valves and inspect the oil control valves and
cylinder head port for contamination or debris (see photo).
Was contamination or debris found?


YES: Inspect the oil passage for debris and clear the passage if debris is found. A vacuum device
such as a brake bleeder may be helpful in removing the debris.
 If the OCV tip filter is damaged, replace the cylinder deactivation OCV.
NO: Proceed with a normal diagnosis for DTC P3400 on MGSS.
Page 1 of 2
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.
© 2020 Mazda North American Operations, U.S.A.
09/11/2020 2:16 PM tlawrenc
Service Alert No.: SA-061/20
Last Issued: 09/10/2020
3. Verify repair.
WARRANTY INFORMATION
Warranty does not apply if condition is created from outside influence.
Page 2 of 2
CONSUMER NOTICE: The information and instructions in this bulletin are intended for use by skilled technicians. Mazda technicians utilize the proper tools/
equipment and take training to correctly and safely maintain Mazda vehicles. These instructions should not be performed by “do-it-yourselfers.” Customers
should not assume this bulletin applies to their vehicle or that their vehicle will develop the described concern. To determine if the information applies,
customers should contact their nearest authorized Mazda dealership. Mazda North American Operations reserves the right to alter the specifications and
contents of this bulletin without obligation or advance notice. All rights reserved. No part of this bulletin may be reproduced in any form or by any means,
electronic or mechanical---including photocopying and recording and the use of any kind of information storage and retrieval system ---without permission in
writing.
© 2020 Mazda North American Operations, U.S.A.
09/11/2020 2:16 PM tlawrenc