P0AB9 on Mazda vehicles
P0AB9 is named on 5 Mazda model years (2024–2026): 6 manufacturer filings and 0 owner reports in NHTSA’s files, across CX-90, CX-70.
Which Mazda model years name P0AB9
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2024 Mazda CX-90 | Engine | 2 | — |
| 2026 Mazda CX-70 | Electrical System | 1 | — |
| 2026 Mazda CX-90 | Engine | 1 | — |
| 2025 Mazda CX-70 | Engine | 1 | — |
| 2025 Mazda CX-90 | Engine | 1 | — |
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.
Mazda filings that name P0AB9
Source: NHTSA manufacturer communicationsBulletins and campaigns Mazda filed with NHTSA whose summary names P0AB9. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- SA-076-23 Service bulletin2023-11-04 · Engine And Engine Cooling
- Some vehicles may exhibit the CHECK ENGINE light turning ON with DTC P0AB9:00 (PCM Start Signal System) stored in memory. This may be caused by a PCM Start Signal System error detected due to improper PCM logic. To eliminate this concern, the control software of the PCM has been modified.
- 09-027-26 Service bulletin2026-09-29 · Engine
- DESCRIPTION Some CX-70 and CX-90 PHEV vehicles may fail to start (enter READY mode) in cold weather, but the vehicle can often be started successfully on the next attempt. This may occur when leakage current between connector terminals causes the MAIN Relay to be falsely detected as ON. As a result, the Battery ECU may incorrectly determine the relay status, preventing READY mode activation and re
What P0AB9 means
Source: SAE J2012 / OBD-IIP0AB9 sits in the generic range of the OBD-II standard, so it means the same thing on every vehicle sold in the United States — but WhichTrim does not carry a definition for it and will not invent one. What is on this page is the record: who named it and on what.
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.
Common questions
Source: NHTSA files and the OBD-II standardIs P0AB9 a known problem on Mazda vehicles?
It is a documented one: NHTSA's files hold 6 manufacturer filings and 0 owner reports naming P0AB9 on 5 Mazda model years (2024–2026). 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 P0AB9 appear on most?
2024 CX-90 (2 documents), 2026 CX-70 (1 document), 2025 CX-70 (1 document).
Does P0AB9 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.