1R23-12A650-AA 2001 Fairlane 4.0L ANY Engine Control Module 12AA Catch_12UD Catch code: DYK4

Catch code: DYK4

This is an anti tuning protection that was implemented on these Ecm's from the manufacturer

Fuel Injector Cleaning & Flow Testing Service

5L 2004-2005 GMC Canyon 2

Catch code: MIF2

1R23-12A650-AA 2001 Fairlane 4.0L ANY Engine Control Module 12AA Catch_12UD Catch code: DYK4Remanufactured PCM ECU VIN Programmed Ready to Install This remanufactured PCM (Powertrain Control Module) ECU (Engine Control Unit) is professionally rebuilt, tested, and VIN programmed specifically to your vehicle. Each unit is delivered fully programmed and ready to install, eliminating the need for the dealership. Product details Model year: 2001 Vehicle line: Fairlane Engine displacement: 4. 0L ANY Catch code: 12AA PCM type: EEC V Hardware type