Diagnostic article Generic OBD-II
P2507: Mazda transport-mode starts can leave a low-voltage history code
Mazda documents a P2507:00 case after repeated short restart intervals with the room fuse removed on 2016-and-newer covered models.
Read before applying this article
Documented application
Mazda TSB 01-002/20, January 23, 2020: its P2507 case applies only to 2016-and-newer vehicles within the listed CX-5, Mazda6, Mazda3, CX-3, MX-5 and CX-9 ranges; Mazda3 coverage ends at 2018 and the others at 2020.
The code alone does not identify a failed part or establish that a vehicle is safe to drive. Confirm the vehicle, reporting module and applicable service procedure.
P2507:00 can be a historical consequence of transport-mode operation in Mazda TSB 01-002/20. The bulletin describes starting the engine three or more times with short shutdown intervals while the 15-amp room fuse is removed. In that condition, P2507 may accompany P2610 after startup or be discovered later without an illuminated warning lamp.
The P2507 year restriction is narrower than the headline list
Although the bulletin’s vehicle list begins earlier for some models, Mazda explicitly limits this P2507 situation to 2016 and later. Applying the earliest CX-5 or Mazda6 year in the heading to P2507 would overlook that restriction. The documented use case also concerns dealer-inventory vehicles, not an established explanation for every low-voltage fault in daily service.
The transport-mode odometer indication and room-fuse history help distinguish the case from an ongoing PCM power-supply problem. A stored code without a present warning is possible, so record its status and the accompanying P2610 rather than assuming a current electrical failure.
The corrective sequence preserves a diagnostic boundary
Mazda instructs the technician to restore the correct room fuse with ignition off, carry out the specified engine-run and restart sequence, verify the warning lamp and clear the two recorded entries. Other remaining faults require their own MGSS or Workshop Manual diagnosis.
The bulletin does not call for PCM replacement or identify a universally defective battery. If the vehicle has no relevant transport or fuse history, or the power fault persists after the prescribed work, this narrow explanation is insufficient. Ask the workshop to evaluate the actual supply condition instead of repeatedly clearing a returning code.
Source and applicability
Mazda TSB 01-002/20, January 23, 2020: its P2507 case applies only to 2016-and-newer vehicles within the listed CX-5, Mazda6, Mazda3, CX-3, MX-5 and CX-9 ranges; Mazda3 coverage ends at 2018 and the others at 2020.
01-002-20-3678 — NHTSA manufacturer communication 10170813, physical PDF pages 1, 2, 3.
Article source documents
Source checks describe how the text was prepared; they do not certify a diagnosis or confirm compatibility with every vehicle using this code.
Original code reference
Dictionary definition
ECM/PCM Power Input Signal Low
This definition retains its original catalog scope. The article above is limited to its explicitly documented application.
Reference scope
Generic OBD-II definition.
A manufacturer label does not establish the model, year, engine or module to which a diagnosis applies. Read the safety and diagnostic limits.
Definition source
- DTC Database: pinned community code definitions
Source checked · MIT