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Home >> Alfa Romeo >> 2019 >> Giulia Base, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> 2.0L - DTCS P1128-00 To P1E39-00 >> DTC Troubleshooting >> P1607-00-ECM Internal Off Timer Performance Rationality (Slow) >> Possible Causes

Possible Causes

Possible Causes
COOLING SYSTEM ISSUES
AMBIENT AIR TEMPERATURE (AAT) SENSOR
ENGINE COOLANT TEMPERATURE (ECT) SENSOR
POWERTRAIN CONTROL MODULE (PCM) SOFTWARE
POWERTRAIN CONTROL MODULE (PCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  . 

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