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Diagnostic trouble code · Mazda

B115E on Mazda vehicles

B115E is named on 21 Mazda model years (2017–2021): 21 manufacturer filings and 0 owner reports in NHTSA’s files, across CX-3, CX-5, CX-9, MX-5, Mazda3 and 1 more.

Body 21 model years 21 manufacturer filings

Which Mazda model years name B115E

Source: NHTSA manufacturer communications and complaints
Model yearFiled underBulletinsOwner reports
2021 Mazda CX-3Equipment Adaptive/Mobility1—
2021 Mazda CX-5Forward Collision Avoidance1—
2021 Mazda CX-9Forward Collision Avoidance1—
2021 Mazda MX-5Equipment Adaptive/Mobility1—
2021 Mazda Mazda6Equipment Adaptive/Mobility1—
2020 Mazda CX-3Equipment Adaptive/Mobility1—
2020 Mazda CX-5Equipment Adaptive/Mobility1—
2020 Mazda CX-9Forward Collision Avoidance1—
2020 Mazda MX-5Equipment Adaptive/Mobility1—
2020 Mazda Mazda6Equipment Adaptive/Mobility1—
2019 Mazda CX-3Forward Collision Avoidance1—
2019 Mazda CX-9Forward Collision Avoidance1—
2019 Mazda MX-5Equipment Adaptive/Mobility1—
2019 Mazda Mazda6Forward Collision Avoidance1—
2018 Mazda CX-3Forward Collision Avoidance1—
2018 Mazda CX-9Equipment Adaptive/Mobility1—
2018 Mazda Mazda3Equipment Adaptive/Mobility1—
2018 Mazda Mazda6Equipment Adaptive/Mobility1—
2017 Mazda CX-5Forward Collision Avoidance1—
2017 Mazda Mazda3Equipment Adaptive/Mobility1—
2017 Mazda Mazda6Forward Collision Avoidance1—

A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.

Equipment Adaptive/Mobility 12 Forward Collision Avoidance 9
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Mazda filings that name B115E

Source: NHTSA manufacturer communications

Bulletins and campaigns Mazda filed with NHTSA whose summary names B115E. Quote the document number at the service desk — it is a diagnosis the maker has already written down.

What B115E means

Source: SAE J2012 / OBD-II

B115E is a manufacturer-specific code: the second character is a 1, which under the OBD-II standard hands the definition to whoever built the vehicle. The same code can mean one thing on a Ford and something unrelated on a Hyundai. Any site that prints a single definition for it is guessing.

A stored code names the test that failed, never the part that caused it. The record above is what Mazda and its owners have filed about it; the code’s page across every make has the whole file.

From here

Common questions

Source: NHTSA files and the OBD-II standard

Is B115E a known problem on Mazda vehicles?

It is a documented one: NHTSA's files hold 21 manufacturer filings and 0 owner reports naming B115E on 21 Mazda model years (2017–2021). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.

Which Mazda models does B115E appear on most?

2021 CX-3 (1 document), 2020 CX-3 (1 document), 2019 CX-3 (1 document).

Does B115E on a Mazda mean it is recalled?

No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.