2010 Suburban 5.3 P0521 Oil Sensor

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OP
OP
D

DT360

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Joined
Feb 21, 2025
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is it like suck on 20psi and doesn't move? kinda makes it sound like it's not low oil pressure as much as it's just not doing what expected.

Engine Oil Pressure
(EOP) Sensor
Performance
P0521 Determines if the Engine
Oil Pressure (EOP)
Sensor is stuck or biased
in range
To fail a currently
passing test:
Diagnostic enabled /
disabled
Performed every
100 msec
50 failures out of 63
samples
Performed every
Enabled
< -50.0 kPa OR >
50.0 kPa
Oil Pressure Sensor In
Use
The filtered,weighted
difference between
measured EOP and
predicted EOP (a function
of engine speed and
engine oil temp.):
Present
> -47.0 kPa AND <
47.0 kPa
Engine Oil Pressure
(EOP) Sensor
Circuit Low Voltage
P0522 Determines if the Engine
Oil Pressure (EOP)
Sensor circuit voltage is
too low
(Engine Oil Pressure
Sensor Circuit Voltage) / 5
Volts
Filtered engine oil
pressure test weighting
(function of engine speed,
engine oil temperature,
predicted oil pressure, and
engine load stability).
Details on Supporting
Tables Tab (P0521
Section)
>= 0.30 weighting
To pass a currently
failing test:
The filtered, weighted
difference between
measured EOP and
predicted EOP (a function
of engine speed and
engine oil temp.):
Moves 20-40psi when vehcile is shifting gears. Drops down to 20 psi when not shifting and holding constant speed.
 

j91z28d1

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Feb 28, 2022
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Moves 20-40psi when vehcile is shifting gears. Drops down to 20 psi when not shifting and holding constant speed.


I don't see why that would be throwing a code. it seems. well within spec
 

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