2010 Suburban 5.3 P0521 Oil Sensor
- Thread starter DT360
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
Charlie207
Full Access Member
Are you saying you switched out the oil pressure sensor, and still get the CEL?
How is the wiring... any frays, cuts, pinches?
How is the wiring... any frays, cuts, pinches?
Yes, i swapped it out three times (thinking i had bad sensors). Now I know I have three good sensors and it is my chevy that is the issue.
I checked the wiring (from what I can tell at the port and what my eyes and hand can see/feel) checks out. No breaks, fraying of any sort.
I checked the wiring (from what I can tell at the port and what my eyes and hand can see/feel) checks out. No breaks, fraying of any sort.
Last edited:
Has the filter below the oil pressure sensor been verified as clean?
What does the gauge read if you unplug the sensor?
What does the gauge read if you unplug the sensor?
Yes I removed it complete and undamaged with a 5/16 lag screw. No I have no tried that. I will unplug it this evening.
scanner and gauge reads 20psi.
When unplugged, reads 0. Sensors are good (who needs a new used sensor lol).
It's been reading 20psi for a decade and now it wants to fault. I'm taking a stab in the dark here but I'm going to replace the barbell on the rear motor when i drop the transmission this summer/next month. If i'm feeling it, i'll replace the cam shaft thrust plate up front too (I reused my old one b/c I was running out of time - dumb i know).
When unplugged, reads 0. Sensors are good (who needs a new used sensor lol).
It's been reading 20psi for a decade and now it wants to fault. I'm taking a stab in the dark here but I'm going to replace the barbell on the rear motor when i drop the transmission this summer/next month. If i'm feeling it, i'll replace the cam shaft thrust plate up front too (I reused my old one b/c I was running out of time - dumb i know).
You may want to walk through the diag procedure:
P0521 — 2010 Chevrolet Suburban 2WD V8-5.3L Service Manual | Operation CHARM
Detailed repair manual for the 2010 Chevrolet Suburban 2WD V8-5.3L.
charm.li
I"ll give this a go.
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.):
