Home >> Jaguar >> 2012 >> XJ Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> Diagnostic Trouble Code Index DTC: Engine Control Module (ECM) V8 5.0L Petrol/V8 S/C 5.0L Petrol -- XJ/X351 >> DIAGNOSTIC TROUBLE CODE (DTC) INDEX DTC: V8 5.0L Petrol/V8 S/C 5.0L Petrol, Powertrain Control Module (PCM) >> Description And Operation >> Powertrain Control Module (Pcm) - 5.0L Petrol >> P0606-86 Control Module Processor - Signal invalid >> Possible Causes