Can this really happen - Pontiac G8 Forum: G8 Forums - G8Board.com
Tech Lounge First Mods / Basic Tech Questions

 2Likes
  • 1 Post By GOPHERIT
  • 1 Post By ebg8gt
 
LinkBack Thread Tools
post #1 of 16 (permalink) Old 03-23-2019, 04:51 PM Thread Starter
Senior Member
 
Join Date: Jan 2010
Location: Fountain Valley California
Posts: 4,095
Can this really happen

I have zero problems with the MIL light for 9 years. Then I get the P0521 fault (oil pressure sensor performance). I install a new AC Delco sensor, an the problem goes away. 10 months later same fault pops up. This time I buy a sensor for half the price (thinking that if the AC Delco only last that long nowadays) I might as well take a shot using an alternate sourced unit (for half the price). After 5 drive cycles, the fault pops up again (well crap). Using "BarnesGN" disconnect reconnect connector cycling method (that corrected his drivers side seat heat problem), I did that to my oil sensor connector (using the previously removed sensor). This to eliminate any chance of pin to socket invisible corrosion. I then reconnected it to the new sensor still in the block. I also decided to change the oil an filter even thou the OLM still showed 70% remaining. The car has now gone thru several days an many start/run cycles, an no more problem. I'm leaning towards the oil filter as causing my problem. CAN an oil filter actually develop an internal problem to the extent that it screws up the oil pressure enough to create a situation that says the oil pressure sensor is bad ? If any of you know if this can (or has) happened to you as well as what the heck most likely happened to that filter, tell me about it.



This problem has caused a secondary problem for me. I'm due for a smog check, and resetting the fault code causes most of the OBD2 monitors to start their testing all over again. So now I'm caught between a rock an a hard place, until the monitors complete their testing. 4 of them complete their tests right away. MIS (misfire monitor) CCM (comprehensive component monitor) FUE (fuel system monitor) HTR (oxygen system heater monitor). After a couple of days covering about 50 to 75 miles, the CAT (catalyst monitor) an O2S (oxygen sensor monitor) come on line. I'm still waiting for the EVA (EVAP system monitor). I have read others taking a long time getting this monitor on line, an I can concur. I'll keep checking to see when it does happen, an will post up the total time it took for me (if ever). The good, is that even in California, you are allowed to take the test with the EVAP monitor in the *not ready* status condition. They are aware that a lot of cars never get that system monitor on line. An as long as there are no fault codes pertaining to that system, they will complete the testing.
GOPHERIT is offline  
Sponsored Links
Advertisement
 
post #2 of 16 (permalink) Old 03-23-2019, 06:56 PM
Senior Member
 
Join Date: Nov 2018
Posts: 104
I work at a repair shop and have had oil filters plug up on these motors with DOD and cause that code because of low oil pressure. Going from 20psi to 50psi with just a filter change and nothing else. Verified it with a manual gauge hooked up also.
Wildfan1976 is offline  
post #3 of 16 (permalink) Old 04-07-2019, 07:15 PM Thread Starter
Senior Member
 
Join Date: Jan 2010
Location: Fountain Valley California
Posts: 4,095
OK, my EVAP ready monitor is now back on line. The scanner went from amber to green, indicating that all the monitors are now on line. *Did not* have the ability to perform the EVAP testing as described by so many (which may have sped up the process). The car had to be used as it always is. I used about 1 1/3 tanks of gas with the car being forced to accomplish many shot runs an very few freeway speed runs. But it shows that it can an will happen, if all EVAP components in the system are operating normally.
GOPHERIT is offline  
 
post #4 of 16 (permalink) Old 04-08-2019, 04:47 PM
Senior Member
 
Join Date: Nov 2009
Location: Toronto, Canada
Posts: 3,485
Did you ever replace the filter UNDER the oil pressure sensor? smaller than shown, lol



'09 PBM GT. #2 Kook's Mids, Solo Mach balanced, SCT X4 Tuner. LED H/lamps, Tail lamps and Interior
GT Drew is offline  
post #5 of 16 (permalink) Old 04-08-2019, 05:42 PM Thread Starter
Senior Member
 
Join Date: Jan 2010
Location: Fountain Valley California
Posts: 4,095
^^^^^ I had bought one to go along with the sensor that I replaced 10 months ago. I reshaped a cheap pick (part of a kit (for a next to nothing price from Harbor Freight tools). This allowed that pick to be push down inside of that tiny plastic filter. The friction created, allowed the modified pick to easily pull that filter out. Dropped the new one in, but then it needed to be pressed down to its proper position. I used the pick (big mistake), as it ended up tearing a small hole in that new filter when trying to push it down. Removed it, cleaned the original an reinstalled it. Actually, the original was basically clean as a whistle to begin with. I now know better how to press it into place.
GOPHERIT is offline  
post #6 of 16 (permalink) Old 04-09-2019, 07:37 AM
Senior Member
 
ebg8gt's Avatar
 
Join Date: Jan 2017
Location: Mount Airy, MD
Posts: 566
Have you actually checked what amount of oil pressure you have?

2009 PBM GT
Under the Knife Again
Wiseco Pistons, K1 Rods, Johnson Lifters, BLP Keep Hatin' PDS Cam, Roto-Fab, BLP Ported Intake and Throttle Body, Kooks 1-7/8 long tubes, XForce Varex Catback, ZL1 Converter, Camaro Trans Pan/Filter, GXP Brembos
Breyton GTS-AV Wheels, 6k HIDs, Holden Steering Wheel and Paddle Shifters, Eibach Springs, 35% Tint
Tuned by Day Tuning
ebg8gt is offline  
post #7 of 16 (permalink) Old 04-09-2019, 09:13 AM Thread Starter
Senior Member
 
Join Date: Jan 2010
Location: Fountain Valley California
Posts: 4,095
^^^^ NO--- I really should look for an adapter an gauge combo. That would allow me see exactly what kind of pressure this engine generates. Then test it at idle as well as with some reasonable RPM when cold, and doing the same things with everything up to normal running temps.
ebg8gt likes this.
GOPHERIT is offline  
post #8 of 16 (permalink) Old 04-09-2019, 10:50 AM
Senior Member
 
ebg8gt's Avatar
 
Join Date: Jan 2017
Location: Mount Airy, MD
Posts: 566
Quote:
Originally Posted by GOPHERIT View Post
^^^^ NO--- I really should look for an adapter an gauge combo, that would allow me see exactly what kind of pressure this engine generates. Then test it at idle as well as with some reasonable RPM when cold, and doing the same things with everything up to normal running temps.
If you're an Android user, just get the Torque Pro app ($4.99 on the play store), and then order a $10 bluetooth OBDII adapter on Amazon. Then you can monitor oil pressure at all times. Granted it's relying on the sensor doing it's job, but in my experience, the sensor is pretty good.
nda9090 likes this.

2009 PBM GT
Under the Knife Again
Wiseco Pistons, K1 Rods, Johnson Lifters, BLP Keep Hatin' PDS Cam, Roto-Fab, BLP Ported Intake and Throttle Body, Kooks 1-7/8 long tubes, XForce Varex Catback, ZL1 Converter, Camaro Trans Pan/Filter, GXP Brembos
Breyton GTS-AV Wheels, 6k HIDs, Holden Steering Wheel and Paddle Shifters, Eibach Springs, 35% Tint
Tuned by Day Tuning

Last edited by ebg8gt; 04-09-2019 at 11:49 AM.
ebg8gt is offline  
post #9 of 16 (permalink) Old 04-09-2019, 04:36 PM
Low society member
 
Join Date: Dec 2018
Posts: 91
Change your oil and oil filter
Gettag8 is offline  
post #10 of 16 (permalink) Old 04-09-2019, 05:24 PM
Senior Member
 
Join Date: Jan 2012
Location: seattle
Posts: 1,508
What oil filter did you use and what did you replace it with?
Jeff92se is offline  
post #11 of 16 (permalink) Old 04-09-2019, 06:29 PM Thread Starter
Senior Member
 
Join Date: Jan 2010
Location: Fountain Valley California
Posts: 4,095
It had the AC Delco P48E, an it was replaced with the same. If this P/N is starting to become famous for going south way before its time, I'll need some help from you guys as to which brands of filters (with their crossover P/N's) that have proven out to be a better choice. I can drift away from some of the AC Delco products if its becoming dicey sticking to that brand.
GOPHERIT is offline  
post #12 of 16 (permalink) Old 04-09-2019, 06:47 PM
Slowly gaining acceptance
 
Jimal's Avatar
 
Join Date: Aug 2016
Location: New Milford, Conn.
Posts: 373
I'm doing my first oil change on my G8 as soon as tomorrow (previous I had it done with other fluid-intensive service, like the transmission or cooling system), and I'm using a Wix 57060XP. Not overly expensive and I've had good luck with Wix over the years. Dropping in Wix air filter while I'm at it.
Jimal is offline  
post #13 of 16 (permalink) Old 04-09-2019, 07:49 PM
Senior Member
 
ebg8gt's Avatar
 
Join Date: Jan 2017
Location: Mount Airy, MD
Posts: 566
When I had the P0521 one code, I was seeing around 13 psi of oil pressure at hot idle. I replaced the sensor once, CEL came back on about 100 miles later. At that point I changed the oil and filter (Mobil1 5w-30 and ACDelco PF48E), and the CEL stayed off for over 3000 miles. We'll never know the outcome though, because that's the point that I pulled the engine for DOD-delete.

So yeah, changing the oil could help. You could also switch to Rotella T6 5w-40. May help retain some pressure once it gets hot.

2009 PBM GT
Under the Knife Again
Wiseco Pistons, K1 Rods, Johnson Lifters, BLP Keep Hatin' PDS Cam, Roto-Fab, BLP Ported Intake and Throttle Body, Kooks 1-7/8 long tubes, XForce Varex Catback, ZL1 Converter, Camaro Trans Pan/Filter, GXP Brembos
Breyton GTS-AV Wheels, 6k HIDs, Holden Steering Wheel and Paddle Shifters, Eibach Springs, 35% Tint
Tuned by Day Tuning
ebg8gt is offline  
post #14 of 16 (permalink) Old 04-09-2019, 09:29 PM
Low society member
 
Join Date: Dec 2018
Posts: 91
I just had this code and changed oil pressure sensor 1st then used mobil 1 oil and k&n oil filter and it went away. If you search post do i really need new engine another member had this code also and has alot of input but i would change oil and filter
Gettag8 is offline  
post #15 of 16 (permalink) Old 04-11-2019, 11:48 AM
Senior Member
 
PONY MAN's Avatar
 
Join Date: Mar 2010
Location: EARTH :-/
Posts: 4,342
Believe "e" core filters are smaller, less expensive, economy, and designed to be "green". Have not used an AcDelco oil filter in ages and Wix seems to consistently receive good reviews. Mainly use Purolator, but would presume better oil filters are available.

#NEVER GIVE UP
#AUDACITY OF HOPE

"Rather not run the risk of offending anyone, so let me just go ahead and offend someone". -PONY MAN

"When you write the story of your life, don't let anyone else hold the pen". -UNKNOWN














PONY MAN is offline  
post #16 of 16 (permalink) Old 04-11-2019, 12:57 PM
Slowly gaining acceptance
 
Jimal's Avatar
 
Join Date: Aug 2016
Location: New Milford, Conn.
Posts: 373
Quote:
Originally Posted by PONY MAN View Post
Believe "e" core filters are smaller, less expensive, economy, and designed to be "green". Have not used an AcDelco oil filter in ages and Wix seems to consistently receive good reviews. Mainly use Purolator, but would presume better oil filters are available.

Purolater is what came off when I did my oil change. I also accidentally put in exactly the right amount of oil
Jimal is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Pontiac G8 Forum: G8 Forums - G8Board.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Did that really happen!? richsfish Lounge 22 06-25-2013 12:14 PM
How the hell does this happen?! stickjohnsonaah Lounge 15 09-21-2008 06:00 PM
I never thought this would happen to me :( Boomer Lounge 29 09-17-2008 07:14 PM
10" Rear Wheel ....anyone do it yet?? Torqued Autosports is gonna make it happen!! GTXgp Wheels / Tires 43 07-12-2008 07:54 PM
g8 does not happen hayabusa G8 GT Talk (V8) 8 07-06-2008 05:30 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome