MAS003581

TECHNICAL SERVICE OPERATIONS
MAS003581 MTB 23-03
Technical Info
FROM: Maserati TSO
TO: Maserati Network
V6 ECM DTC P0090 – Investigation required
DATE: JUNE 9 2023
MODELS: MY23 Ghibli (M157), Quattoporte (M156) and Levante (M161) equipped with V6 Petrol engine
TOPIC: We are tracing some cases in field on Gasoline V6 MY23 vehicles related to the storage in ECM of
the DTC P0090 - Fuel Pressure Regulator 1 Control Circuit Open linked to engine warning light on and limp
home mode
This DTC is stored in case the ECM detects a driving current value of GDI pump MSV valve lower then 0,7 [A]
for more than 500 ms.
CAUSE: under investigation
ACTION: In case of management of a similar case, it is requested not to carry out any repair or replacement
intervention and to carry out the following diagnostic steps and open a Blue on Line as a Support Request
providing the following information:
1)
Ask the customer for the number of occurrences of the anomaly, the frequency and the conditions
in which it occurred
2)
Confirm whether the anomaly is reproducible or not
3)
Save a complete vehicle scan report (DTC + Parameters)
4)
Check that the ECM M101-B connector is correctly connected/secured and take a picture without
removing it
5)
Remove the ECM M101 -B connector and visually inspect PINs 85 and 86 both on the connector
side and on the control unit side (attach photo). Check for any connector deformation, setback or
pin contamination.
6)
If no anomalies are found, install the connector again and check whether the anomaly is
reproducible or not.
7)
Open a Blue On Line as Support Request providing the outcome of the suggested checks. Maserati
technical support will provide further instruction on the next steps of the diagnosis/repair. A field visit
will also be evaluated for potential European cases.
Contact the Technical Support Helpdesk if you have any questions. ([email protected])
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MAS003581
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