P2507 code meaning
ECM/PCM Power Input Signal Low
Powertrain system Generic code P25xx codes Check engine light
What P2507 means
P2507 reports that a supply input of the engine module sits too low. Makers read this differently. Mazda calls it a low PCM battery voltage input: on 2013–2020 models from CX-5 to MX-5 it appears together with P2610 when the engine was started three or more times after stops shorter than 15 s while the 15 A room fuse was pulled for transport; it concerns 2016 and later models and, as a stored past fault, usually goes unnoticed. On the 2024 CX-90 a loosely seated 25 A fuse F1 led to P2507, many warning lamps and a no-start. Ford's 2023 6.7 L diesel instead watches the module's internal 5 V rail and sets P2507 below 4.2 V, monitored continuously over about 5 s. P0562 is the system-voltage code; P2508 is the high case.
P2507 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.2 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2507
- Often no symptom, code found during service (Mazda)
- Several warning lamps, blank displays
- No-start in severe cases
Common causes of P2507
- Most likelySupply fuse missing, pulled for transport or not fully seated
- PossibleWeak battery or voltage dips during repeated starts
- PossibleCorroded supply wire, ground or relay contact
- Less likelyInternal 5 V supply of the module failing (Ford diesel)
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Main relayPower input wireBattery
What each part of P2507 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 5 | Area: vehicle speed, idle control and auxiliary inputs. |
| 07 | The exact fault in that area. |
What to do next
- Note P2507 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2507
What does P2507 mean?
P2507 means "ECM/PCM Power Input Signal Low". P2507 reports that a supply input of the engine module sits too low. It is a generic code, so it means the same on every make.
Is it safe to drive with P2507?
Drive gently and only to a workshop. With P2507 the car can go into limp mode (reduced power) to protect itself.
Will P2507 fail an emissions test?
Yes, it can. P2507 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2507 to fix?
Difficulty: medium. A typical repair takes 0.2 to 3 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2507 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.