Powertrain, generic (extended)

P2507 ECM/PCM Power Input Signal Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Supply fuse missing, pulled for transport or not fully seated
Weak battery or voltage dips during repeated starts
Corroded supply wire, ground or relay contact
Internal 5 V supply of the module failing (Ford diesel)

Symptoms

  • Often no symptom, code found during service (Mazda)
  • Several warning lamps, blank displays
  • No-start in severe cases

Repair estimate

DifficultyMediumDIY possible
Parts and labour€0–800
Time0.2–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

main relaypower input wirebattery

Related codes

P2505P2508P0562P2610

References: static.nhtsa.gov, static.nhtsa.gov, fordservicecontent.com.