In November 2018, Mazda filed a statutory recall with Japan's Ministry of Land, Infrastructure, Transport and Tourism (MLIT) concerning the Computer (Emissions/Noise), covering the Atenza, Axela and 2 more models. The filing affects 235,293 vehicles manufactured between February 13, 2012 and July 2018.
Overview
| MLIT filing number | 1143513 |
|---|---|
| Type | Statutory Recall (government-mandated recall) |
| Date filed | November 8, 2018 |
| Manufacturer(s) | Mazda |
| Component | Computer (Emissions/Noise) |
| Production period | February 13, 2012 — July 2018 |
| Vehicles affected | 235,293 units |
Filing in context
The Computer (Emissions/Noise) is the most frequently cited component category in this archive, appearing in 9 of its 4,890 filings. This filing is one of 39 Mazda notifications from 2018 in this archive. For scale, 212 of the 4,890 filings in this archive report a larger number of affected vehicles; the vehicles involved here were manufactured over a span of about 6 years and 5 months.
Defect
The fault detection program for the engine exhaust pressure sensor is incorrect, causing the system to fail to register a fault when moisture intrudes into the sensor and shifts its output value outside the specified range, resulting in exhaust emissions that do not meet regulatory standards. Continued operation in this condition allows the intruded moisture to corrode the sensor's internal electronic circuit, causing a broken wire. This triggers the engine warning light and activates fail-safe control, disabling the idling stop function and potentially causing increased shift shock.
Corrective action
On all vehicles, inspect the engine control computer and reprogram the exhaust pressure sensor control program to the corrected software. If the inspection reveals an abnormality in the exhaust pressure sensor, replace the sensor with a new current-production unit. Additionally, if the engine warning light illuminates after the software update, replace the exhaust pressure sensor with a new current-production unit.
Affected models & chassis ranges
This filing lists 17 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 |
|---|---|---|
| 3DA-GJ2AP | Atenza | GJ2AP-400003 — GJ2AP-400012 |
| 3DA-GJ2AW | Atenza | GJ2AW-400004 — GJ2AW-400012 |
| 3DA-GJ2FP | Atenza | GJ2FP-400003 — GJ2FP-400013 |
| 3DA-GJ2FW | Atenza | GJ2FW-400006 — GJ2FW-400013 |
| 3DA-KF2P | ＣＸ－５ | KF2P-200005 — KF2P-207960 |
| 3DA-KG2P | ＣＸ－８ | KG2P-100037 — KG2P-117382 |
| LDA-BM2AP | AXELA | BM2AP-100004 — BM2AP-100349 |
| LDA-BM2AS | AXELA | BM2AS-100007 — BM2AS-101509 |
| LDA-BM2FP | AXELA | BM2FP-100002 — BM2FP-201021 |
| LDA-BM2FS | AXELA | BM2FS-100006 — BM2FS-202741 |
| LDA-GJ2AP | Atenza | GJ2AP-100010 — GJ2AP-301008 |
| LDA-GJ2AW | Atenza | GJ2AW-100007 — GJ2AW-301584 |
| LDA-GJ2FP | Atenza | GJ2FP-100014 — GJ2FP-302443 |
| LDA-GJ2FW | Atenza | GJ2FW-100012 — GJ2FW-303000 |
| LDA-KE2AW | ＣＸ－５ | KE2AW-100017 — KE2AW-217477 |
| LDA-KE2FW | ＣＸ－５ | KE2FW-100009 — KE2FW-221328 |
| LDA-KF2P | ＣＸ－５ | KF2P-100029 — KF2P-131275 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
エンジンの排気圧センサにおいて、異常判定プログラムが不適切なため、センサ内部への水分の浸入により、センサの出力値がずれ、排出ガスが基準値を満足しなくなる場合に、異常判定しない。そのため、そのままの状態で使用を続けると、浸入した水分により排気圧センサ内の電子回路が腐食し、断線することでエンジン警告灯が点灯し、フェールセーフ制御によりアイドリングストップが作動しなくなり、変速ショックが大きくなるおそれがある。
改善措置
全車両、エンジン制御コンピュータを点検し、排気圧センサ用制御プログラムを対策プログラムに修正する。点検の結果、排気圧センサに異常がある場合は、排気圧センサを現行の新品に交換する。また、プログラム修正後にエンジン警告灯が点灯した場合は、排気圧センサを現行の新品に交換する。
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=3004361
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