Home >> Land Rover >> 2021 >> Defender 110 SE >> Repair and Diagnosis (Single Page) >> Quick Lookups >> Common Specs & Procedures >> Diagnostic Trouble Code Index INGENIUM I6 3.0L Petrol MHEV, DTC Powertrain Control Module (Pcm) (P064A-42 To U2300-87) -- Defender/L663 >> Diagnostic Trouble Code Index - INGENIUM I6 3.0L Petrol, [+] MHEV, DTC: Powertrain Control Module (Pcm) P064A-42 To U2300-87 (G2986809) >> Description And Operation >> Powertrain Control Module (Pcm) - INGENIUM 3.0L Petrol MHEV - P064A-42 - U2300-87 >> DTC P0666-12: Control Module Internal Temperature Sensor "A" Circuit - Circuit short to battery >> Possible Causes