Overview
| MLIT filing number | 1145150 |
|---|---|
| Type | Statutory Recall (government-mandated recall) |
| Date filed | June 27, 2019 |
| Manufacturer(s) | Mazda |
| Component | Computer (Engine) |
| Production period | February 2018 — May 23, 2019 |
| Vehicles affected | 9,000 units |
Defect
In the engine control computer, a flawed cylinder deactivation control program may cause the valve clearance adjustment mechanism to malfunction when returning from cylinder deactivation mode. This can cause the rocker arm to disengage and contact adjacent components, resulting in engine misfire and loss of power output. In the worst case, the engine may stall.
Corrective action
On all vehicles, reprogram the cylinder deactivation control program in the engine control computer with the corrected/updated software.
Affected models & chassis ranges
This filing lists 3 type code(s). A vehicle is affected if its chassis number falls within one of the ranges below.
| Type code (型式) | Model | Chassis ranges |
|---|---|---|
| 6BA-GJ5FP | Atenza | GJ5FP-400004 — GJ5FP-401175 |
| 6BA-GJ5FW | Atenza | GJ5FW-400003 — GJ5FW-400753 |
| 6BA-KF5P | ＣＸ－５ | KF5P-200003 — KF5P-304386 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
エンジン制御コンピュータにおいて、気筒休止制御プログラムが不適切なため、気筒休止から復帰する際、バルブクリアランス調整機構が誤作動することがある。そのため、ロッカアームが脱落して周辺部品と干渉し、エンジン失火による出力不足が発生して、最悪の場合、エンジンが停止するおそれがある。
改善措置
全車両、エンジン制御コンピュータの気筒休止制御プログラムを対策プログラムに修正する。
Source & verification
This entry reproduces public data from Japan's MLIT recall registry. English text is jdmvin.com's own translation; always verify against the official source:
https://renrakuda.mlit.go.jp/renrakuda/ris-detail-car.html?class=recalldatacar&id=3004538