Buick Regal 2018-2026 Owners Manual / OnStar
Buick Regal: OnStar
READ NEXT:
OnStar Overview
Voice Command Button
Blue OnStar Button
Red Emergency Button
This vehicle may be equipped with a
comprehensive, in-vehicle system
that can connect to an OnStar
Advisor for Emergency, S
Emergency
Emergency Services require an
active, OnStar service plan
(excludes Basic Plan). With
Automatic Crash Response, built-in
sensors can automatically alert a
specially trained OnStar Advisor
who is immed
SEE MORE:
Symptoms - Hydraulic Brakes
NOTE: The following steps must be completed before using the symptom
tables.
1. Perform the Brake System Vehicle Road Test before using the hydraulic
brake symptom tables in
order to duplicate the customer's concern.
2. Review the system operation in order to familiarize yourself with the system
DTC P0521, P0522, or P0523
DTC Descriptors
DTC P0521
Engine Oil Pressure Sensor Performance
DTC P0522
Engine Oil Pressure Sensor Circuit Low Voltage.
DTC P0523
Engine Oil Pressure Sensor Circuit High Voltage
Diagnostic Fault Information
1. Engine Oil Pressure Indicator Malfunction
Circuit/System Description
The engine oil pr
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