Fluctuating oil pressure on 2018 equinox - TerrainForum.net: GMC Terrain Forum
 6Likes
Reply
 
LinkBack Thread Tools
post #1 of 15 (permalink) Old 12-18-2017, 05:58 PM Thread Starter
Newbie
 
Join Date: Dec 2017
Posts: 1
Fluctuating oil pressure on 2018 equinox

I have a 2.0l T. Has anyone else noticed the oil pressure fluctuating on their new equinox? Going down the road, on level highway, the oil pressure will go between 40psi - 72psi. The rpm's are holding steady with the cruise control on. No up or down shifting going on. Checked with the local dealer and they don't really seem to know if it's supposed to do this. Just curious.
1966cabledog is offline  
Sponsored Links
Advertisement
 
post #2 of 15 (permalink) Old 12-18-2017, 10:11 PM
Sr. Member
 
Join Date: May 2017
Posts: 498
Quote:
Originally Posted by 1966cabledog View Post
I have a 2.0l T. Has anyone else noticed the oil pressure fluctuating on their new equinox? Going down the road, on level highway, the oil pressure will go between 40psi - 72psi. The rpm's are holding steady with the cruise control on. No up or down shifting going on. Checked with the local dealer and they don't really seem to know if it's supposed to do this. Just curious.


it has a variable output oil pump. it’s possible that even tho rpms aren’t changing the level of boost from the turbo is still changing if the load is varying... up or down a hill or something. seems like these motors no matter what they are installed in the oil pressure changes a lot and that’s not a bad thing for the turbo. more boost it’s putting out the higher the oil pressure feed to it should be. also the higher the boost the more load on the internals of the motor so higher oil pressure is good. it would have been nice if gm would allow us to see boost levels in the dic they always seem to keep that feature hidden from customers probably bc it changes so often and people would think there is a problem if they weren’t seeing x lbs of boost that day.


Sent from my iPhone using Tapatalk
Stingray1974 likes this.
kastner03 is offline  
post #3 of 15 (permalink) Old 12-19-2017, 11:23 AM
Theta Freak
 
Join Date: Mar 2011
Posts: 1,179
#17-NA-157: Information on Spin-On Oil Filter Replacement for Gas Engines Designed with New Oil Pump Control Systems - (May 10, 2017)
Subject: Information on Spin-On Oil Filter Replacement for Gas Engines Designed with New Oil Pump Control Systems
Brand:
Model:
Model Year:
VIN:
Engine:
Transmission:
from
to
from
to
Buick
All GM Passenger Cars and Trucks
2012
2017
LV7, LFV, LE2, LEA, LCV, LKW, LTG, LGX, LGW, L86, L83, L8B, LT4, LT1, LV3, LV1
Cadillac
Chevrolet
GMC

Involved Region or Country
North America and N.A. Export Regions
Information
Today's engine has very tight tolerances, two stage oil pumps and high flow lubrication system requirements. The proper match of oil filter to engine application is more important than it has ever been in the past. The use of a replacement oil filter with an internal bypass valve opening pressure specifications of 15 PSI (100 kPa) or less, allows debris to circulate in the engine causing damage to bearings and other tight tolerances areas, which may result in premature engine failure.

The oil pressure was increased to accommodate these tighter tolerances. As a result, the oil filter specifications of the production oil filter and the service oil filter were also improved to meet the new engine requirements.

Beginning in 2012, the oil pumps began to regulate main gallery feedback instead of pump out pressure. This means that the oil pump now does not begin to regulate until pressure is built up to the main gallery. This change reduces the amount of time it takes to provide oil to the engine bearing and lifters during extreme cold start conditions.

Main gallery feedback oil pump control systems are present on the following engine families which use Spin-on oil filters: Small Gas Engine (SGE), Large Gas Engine (LGE), High Feature (HFV6) Gen2 and Small Block Gen5 gasoline engines. These engines with the main gallery feedback oil pump control systems are factory built with an ACDelco® oil filters.
bigb12359 is offline  
Sponsored Links
Advertisement
 
post #4 of 15 (permalink) Old 12-19-2017, 07:51 PM
Hero Member
 
Join Date: Sep 2013
Posts: 749
Quote:
Originally Posted by bigb12359 View Post
#17-NA-157: Information on Spin-On Oil Filter Replacement for Gas Engines Designed with New Oil Pump Control Systems - (May 10, 2017)
Subject: Information on Spin-On Oil Filter Replacement for Gas Engines Designed with New Oil Pump Control Systems
Brand:
Model:
Model Year:
VIN:
Engine:
Transmission:
from
to
from
to
Buick
All GM Passenger Cars and Trucks
2012
2017
LV7, LFV, LE2, LEA, LCV, LKW, LTG, LGX, LGW, L86, L83, L8B, LT4, LT1, LV3, LV1
Cadillac
Chevrolet
GMC

Involved Region or Country
North America and N.A. Export Regions
Information
Today's engine has very tight tolerances, two stage oil pumps and high flow lubrication system requirements. The proper match of oil filter to engine application is more important than it has ever been in the past. The use of a replacement oil filter with an internal bypass valve opening pressure specifications of 15 PSI (100 kPa) or less, allows debris to circulate in the engine causing damage to bearings and other tight tolerances areas, which may result in premature engine failure.

The oil pressure was increased to accommodate these tighter tolerances. As a result, the oil filter specifications of the production oil filter and the service oil filter were also improved to meet the new engine requirements.

Beginning in 2012, the oil pumps began to regulate main gallery feedback instead of pump out pressure. This means that the oil pump now does not begin to regulate until pressure is built up to the main gallery. This change reduces the amount of time it takes to provide oil to the engine bearing and lifters during extreme cold start conditions.

Main gallery feedback oil pump control systems are present on the following engine families which use Spin-on oil filters: Small Gas Engine (SGE), Large Gas Engine (LGE), High Feature (HFV6) Gen2 and Small Block Gen5 gasoline engines. These engines with the main gallery feedback oil pump control systems are factory built with an ACDelco® oil filters.


This is a classic example why to use the CORRECT ACDelco oil filter specified for your GM engine.

So many people debate (and swear-by) aftermarket oil filters. Many posts about oil filters are based on rumors and false information circulating on the Internet. People will spend $30,000 + on a new vehicle and then try to save fifty cents on an aftermarket oil filter.

Never made any sense to me.
bigb12359 and Racerx like this.
1999 White C5 Coupe is offline  
post #5 of 15 (permalink) Old 12-19-2017, 08:21 PM
Hero Member
 
Lee F's Avatar
 
Join Date: Oct 2017
Location: Iowa
Posts: 838
Quote:
Originally Posted by 1966cabledog View Post
I have a 2.0l T. Has anyone else noticed the oil pressure fluctuating on their new equinox? Going down the road, on level highway, the oil pressure will go between 40psi - 72psi. The rpm's are holding steady with the cruise control on. No up or down shifting going on. Checked with the local dealer and they don't really seem to know if it's supposed to do this. Just curious.
Welcome to the site.
On my 2.0, the pressure reads approx 40 on level roads or downhill grades and 70 on uphill grades.


Lee

Iowa
2018 Equinox 2.0 Premier AWD
Made in Canada


2008 Malibu LTZ
3.6 and 6 speed


Past: 2008 Equinox Sport AWD
3.6 and 6 speed
Lee F is offline  
post #6 of 15 (permalink) Old 10-05-2018, 01:57 PM
Newbie
 
Join Date: Jul 2018
Posts: 2
I have a 1.5T that pressure goes high under load and increasing boost. from 35psi to 60+psi or so. Wondering if anyone elese has seen this. If the Equinox has a variable output oil pump then what controls the pressure changes when the RPMs are the same. Just trying to understand how this issue and how it works. Thanks
Stingray1974 is offline  
post #7 of 15 (permalink) Old 10-05-2018, 03:25 PM
Theta GOD!
 
Join Date: Jan 2010
Posts: 9,746
Quote:
Originally Posted by Stingray1974 View Post
I have a 1.5T that pressure goes high under load and increasing boost. from 35psi to 60+psi or so. Wondering if anyone elese has seen this. If the Equinox has a variable output oil pump then what controls the pressure changes when the RPMs are the same. Just trying to understand how this issue and how it works. Thanks

and i think you will find out what you have asked. If not, sorry.

2018 Equinox LT1 1.5 L 4 cyl, AWD, S/R Cajun Red Tintcoat/Black

2010 Equinox LTZ 2.4 L 4 cyl, FWD, S/R Cardinal Red/Black
RIT333 is offline  
post #8 of 15 (permalink) Old 10-05-2018, 04:53 PM
Hero Member
 
Join Date: Oct 2017
Location: New Mexico
Posts: 604
Garage
In the diesel the variation when it is in 6th gear is from 25 psi to 65 psi

Post #2 above gives a good explanation....

So if everything else is constant ...rpm, gear, speed...the oil pressure change must be due to the turbo boost because higher amount of fuel burn per cycle...that is my guess...unless the ECM decided that higher oil pressure is needed and push the oil pump harder...then it is more complicated

2018 equinox 1.6l Diesel LT, Hecho en Mexico, julio 2017
tizan is offline  
post #9 of 15 (permalink) Old 03-13-2019, 02:00 PM
Newbie
 
Join Date: Jan 2019
Posts: 3
My 1.5T still raises pressure 30psi-65psi without rpm increase. The Chevy Service department said this is not normal.They said the pressure should be 30-40psi and only go up with rpm's. They reprogrammed the computer under warranty to try to fix the problem, although it still has the issue. They said it has a regular oil pump with relief and the pressure gauge sensor is on the main gallery.
I have not been inside one of these engines but it seems to me if the pressure is going up the problem could be a blockage when the cam solenoids activate causing a surge in pressure because of loss in flow. This in turn could could starve the cams of oil and cause extra wear and failure. So is cam failure a common issue on the 1.5T or 2.0T engines?
The turbo shouldn't be an issue and doesn't need extra pressure because it has a restrictor built in the oil supply so it doesn't get too much pressure at the turbo because it could cause oil to go by the turbo seals and burn oil.
Is there anyone from GM that can address this issue or add technical info from the manual? It would be nice to know the exact reason for the pressure surges and know that this issue isn't going to end up with premature engine failure.
1974Stingray is offline  
post #10 of 15 (permalink) Old 03-13-2019, 04:13 PM
Theta Freak
 
Join Date: Mar 2011
Posts: 1,179
Engine Oil Pressure Gauge Inaccurate or Inoperative
Diagnostic Instructions
•Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle
•Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
•An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions
DTC Descriptor
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
Circuit
Short to Ground
Open/High Resistance
Short to Voltage
Signal Performance



5 V Reference
P0522
P0522 or 1
P0523
P0521 or 1

Signal
P0522
P0522 or 1
P0523
P0521 or 1

Low Reference

P0523 or 1

P0521 or 1

 1. Low Engine Oil Pressure Indicator = Malfunction


Circuit/System Description
For an overview of the component/system, refer to: Instrument Cluster Description and Operation

Circuit
Description



5 V Reference
Regulated voltage supplied by the control module.

Signal
The control module input circuit has an internal resistance connected to ground.

Low Reference
Grounded through the control module.
B37B Engine Oil Pressure Sensor
The sensor is a capacitive pressure transducer. Electronics in the sensor convert pressure into an analog voltage signal.

K20 Engine Control Module
The K20 control module monitors the B37B Engine Oil Pressure Sensor signal circuit.The control module input circuit has an internal resistance connected to ground.


Conditions for Running the DTC
Engine Running

Conditions for Setting the DTC
P0521
•Engine Oil Pressure = The actual value is not within a predetermined range of the calculated value. — For greater than 4 s
P0522
•Engine Oil Pressure Sensor Circuit = Less than 0.2 V — For greater than 10 s
P0523
•Engine Oil Pressure Sensor Circuit = Greater than 4.8 V — For greater than 10 s
Action Taken When the DTC Sets
•Type C DTC
•Low Engine Oil Pressure Indicator = On
Conditions for Clearing the DTC
DTCs listed in the DTC Descriptor Category = Type C DTC

Reference Information
Schematic Reference
Instrument Cluster Schematics

Connector End View Reference
Master Electrical Component List

Electrical Information Reference
•Circuit Testing
•Connector Repairs
•Testing for Intermittent Conditions and Poor Connections
•Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference
Control Module References

Circuit/System Verification
 1. Ignition » On / Vehicle » In Service Mode
 2. Verify the scan tool parameter: Engine Oil Pressure = 0 kPa (0 PSI)
⇒ If not the specified state
Refer to: Circuit/System Testing

⇓ If the specified state
 3. Verify the engine has the correct oil level and the correct oil pressure before continuing with this diagnostic.
Displays and Gauges Component Replacement Reference

 4. Engine Running
 5. Verify the scan tool parameter: Engine Oil Pressure = CH-48027 Digital Pressure Gauge
⇒ If not the specified state
Refer to: Circuit/System Testing

⇓ If the specified state
 6. Verify the scan tool parameter: V= Engine Oil Pressure — Gauge @ P16 Instrument Cluster
⇒ If not the specified state
Test or replace the component: P16 Instrument Cluster

⇓ If the specified state
 7. All OK.
Circuit/System Testing
Note: It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

 1. Ignition/Vehicle & All vehicle systems » Off
 2. Disconnect the electrical connector: B37B Engine Oil Pressure Sensor
 3. Test for less than 10 Ω between the test points: Low Reference circuit terminal 2 & Ground
⇒ If 10 Ω or greater
3.1. Disconnect the electrical connector: K20 Engine Control Module
3.2. Test for less than 2 Ω between the test points: Low Reference circuit terminal 2 @ Component harness & The other end of the circuit
⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit.
⇒ If less than 2 Ω » Replace the component: K20 Engine Control Module
⇓ If less than 10 Ω
 4. Ignition » On / Vehicle » In Service Mode
 5. Test for 4.8 to 5.2 V between the test points: 5 V Reference circuit terminal 3 & Low Reference circuit terminal 2
⇒ If less than 4.8 V
5.1. Ignition/Vehicle » Off
5.2. Disconnect the electrical connector: K20 Engine Control Module
5.3. Test for infinite resistance between the test points: 5 V Reference circuit terminal 3 @ Component harness & Ground
⇒ If less than infinite resistance » Repair the short to ground on the circuit.
⇓ If infinite resistance
5.4. Test for less than 2 Ω between the test points: 5 V Reference circuit terminal 3 @ Component harness & The other end of the circuit
⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit.
⇒ If less than 2 Ω » Replace the component: K20 Engine Control Module
⇒ If greater than 5.2 V
5.1. Ignition/Vehicle » Off
5.2. Disconnect the electrical connector: K20 Engine Control Module
5.3. Ignition » On / Vehicle » In Service Mode
5.4. Test for less than 1 V between the test points: 5 V Reference circuit terminal 3 @ Component harness & Ground
⇒ If 1 V or greater » Repair the short to voltage on the circuit.
⇒ If less than 1 V » Replace the component: K20 Engine Control Module
⇓ If between 4.8 and 5.2 V
 6. Verify the scan tool parameter: Engine Oil Pressure = 0 kPa (0 PSI)
⇒ If greater than 0 kPa (0 PSI)
6.1. Ignition/Vehicle » Off
6.2. Disconnect the electrical connector: K20 Engine Control Module
6.3. Ignition » On / Vehicle » In Service Mode
6.4. Test for less than 1 V between the test points: Signal circuit terminal 1 @ Component harness & Ground
⇒ If 1 V or greater » Repair the short to voltage on the circuit.
⇒ If less than 1 V » Replace the component: K20 Engine Control Module
⇓ If 0 kPa (0 PSI) or less
 7. Connect a 3 A fused jumper wire between the test points: Signal circuit terminal 1 & 5 V Reference circuit terminal 3
 8. Verify the scan tool parameter: Engine Oil Pressure = Greater than 800 kPa (116 PSI)
⇒ If 800 kPa (116 PSI) or less
8.1. Ignition/Vehicle » Off & Remove » Jumper wire(s)
8.2. Disconnect the electrical connector: K20 Engine Control Module
8.3. Test for infinite resistance between the test points: Signal circuit terminal 1 @ Component harness & Ground
⇒ If less than infinite resistance » Repair the short to ground on the circuit.
⇓ If infinite resistance
8.4. Test for less than 2 Ω between the test points: Signal circuit terminal 1 @ Component harness & The other end of the circuit
⇒ If 2 Ω or greater » Repair the open/high resistance in the circuit.
⇒ If less than 2 Ω » Replace the component: K20 Engine Control Module
⇓ If greater than 800 kPa (116 PSI)
 9. Test or replace the component: B37B Engine Oil Pressure Sensor
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification

•Displays and Gauges Component Replacement Reference
•For control module replacement, programming, and setup refer to: Control Module References
bigb12359 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the TerrainForum.net: GMC Terrain Forum 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









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



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



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