Network, generic (extended)

U3001 Control Module Improper Shutdown Performance

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U3001 tells you that a module did not finish its orderly power-down: supply vanished or dipped before it had closed its tasks and saved its data, so it notes the abrupt end at the next start. Low voltage is the usual trigger. Audi found U300100 static in the engine computer of 2019 A6, A7, A8 and Q8 3.0 TFSI models after a low-voltage event, with the check engine light on and sometimes a no-start, and released new ECM software. Volkswagen saw the same entry in the engine module of 2018–2020 Tiguan, Passat and Beetle after battery work and clears it by switching transport mode on and off. Ford pairs U3001:68 or :89 with U3000:96 in the F-150 steering module (SSM 51226) when voltage is too low at start-up, which costs steering assist until voltage recovers.

Likely causes

Discharged battery, battery swap or jump start cutting power mid-shutdown
Module software that logs the event too readily and needs an update
Loose feed, ground or fuse contact dropping out after key-off
Main or power-hold relay opening before the module is done

Symptoms

  • Stored code found during service, often with no complaint
  • Check engine light on and occasionally a no-start when the engine computer stores it
  • Missing steering assist right after start-up when the steering module stores it

Repair estimate

DifficultyMediumDIY possible
Parts and labour€0–400
Time0.2–1.5 h

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

Parts involved

control modulemodule power supply

Related codes

U3012U3003U3000P2610P0685

References: static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov.