Powertrain, generic · Computer and auxiliary outputs

P06EC Fuel Injector Control Module Requested MIL Illumination

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P06EC is a notice code like P0700: a separate fuel injector control module has stored an emission-related fault of its own and asks the engine module over CAN to switch on the check engine light. The actual fault is stored in that module and must be read there; simple OBD readers show only P06EC. GM uses it on the 2019 Corvette ZR1, whose LT5 engine adds port injection driven by its own module with its own crank and cam inputs; the code runs continuously from key on and is listed as type A without its own MIL – the lamp comes from the module's fault. Older separate injector modules (Ford 6.0 L Power Stroke, GM bi-fuel CNG trucks) report through P0611 or U codes instead. Any limp mode follows the module's fault.

Likely causes

Emission-related fault in the injector control module or its injectors/sensors (code stored there)
Supply, ground or relay problem of the module
Internal module fault (memory, processor)
Software level of engine or injector module

Symptoms

  • Check engine light on
  • Generic scanner shows only P06EC – details in the injector module
  • Depending on the fault, power loss, misfire or limp mode

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–1,500
Time0.5–3 h

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

Parts involved

fuel injector control moduleengine control module

Related codes

P0611P0700P064CP0606P062F

References: gsi.ext.gm.com, static.nhtsa.gov, law.cornell.edu.