The customer reported that the check engine light was illuminated on their 2017 Alfa Romeo Giulietta 2.0l Diesel. After confirming the complaint, a scan tool revealed a fault code related to the Variable Displacement Oil Pump circuit.
Vehicle
2017 Alfa Romeo Giulietta 2.0l Diesel
Title
P1541, Replaced Engine Oil Pressure Sensor
Complaint
The customer states the check engine light is on.
Cause
Confirmed customer complaint of engine light on. Connected a scan tool and found code P1541 – Variable Displacement Oil Pump circuit fault. Monitored live data Parameters for engine oil pressure with the engine running at operating temperature to check for the correct reading. Engine oil pressure sensor reading not within specifications. Carry out mechanical engine oil pressure test using an oil pressure gauge on the engine to confirm engine oil pressure within specifications. Engine oil pressure reading within spec. At idle, used a multi-meter to check for the presence of voltage and ground at the engine oil pressure sensor and found both were present. These test results verified the engine oil pressure sensor was faulty.
Correction
Replaced the engine oil pressure sensor, cleared codes. Confirmed the fix by monitoring live data parameters for oil pressure with the engine running. Performed a road test and verified the vehicle operated properly. The check engine light did not illuminate and no fault codes returned.
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