Powertrain, generic · Computer and auxiliary outputs

P068A ECM/PCM Power Relay De-Energized Performance Too Early

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modeNo

The engine module switches its main relay coil to ground (control circuit), reads the switched voltage back on a sense line and keeps the relay on briefly after ignition off to save learned values. P068A means the relay dropped out before the module released it. Ford explains it as the non-volatile memory write after ignition off not being completed before the module lost power; the 2023 diesel checks continuously within 0.5 s. GM Europe's 2.0 diesel checks with the engine running for an unexpected loss of relay voltage (no MIL). VW (2017–18 Jetta 1.4 T) and Stellantis (2026 Dodge Charger 3.0 twin turbo) fixed false reports by software updates. Real triggers include disconnecting the battery right after switch-off and loose contacts in the relay supply; learned values may be lost.

Likely causes

Engine module software (false report)
Battery disconnected during or right after switch-off, or severe voltage dip
Open, high resistance or short to ground in the relay coil or contact supply
Relay faulty (drops out with vibration or heat)

Symptoms

  • Check engine light (Ford, VW, Stellantis)
  • Often no noticeable symptoms
  • Lost learned values, rough idle after restart
  • With a contact fault: stalling or no start

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–300
Time0.3–2 h

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

Parts involved

ecm power relayrelay control circuitengine control module

Related codes

P068BP0685P06B8P2610P0689

References: law.cornell.edu, newtonnet.co.uk, fordservicecontent.com, static.nhtsa.gov.