Performance issues, low fuel related? Pump Sensor Codes - Chevy Traverse Forum: Chevrolet Traverse Forum
 3Likes
Reply
 
LinkBack Thread Tools
post #1 of 27 (permalink) Old 04-04-2019, 02:55 PM Thread Starter
Junior Member
 
Join Date: Oct 2017
Posts: 6
Unhappy Performance issues, low fuel related? Pump Sensor Codes

I know I was on a thread on this page w/ posts totally related to my question(s), but can't find it for the life of me! I also can't figure out how to keyword search on this page either - so, if you have insight on that, thanks - sorry for the repeat question/issues:

Hey guys - interested in some feedback/confirmation:

I drive a 2017 Traverse LT w/ about 70k miles on it. A few weeks ago i started to experience performance issues while traveling about 55/60 mph..would lose power momentarily, then be okay, then lose again for longer period, then okay, etc. Got to my destination, started it again and the issues worsened. Got to an Advanced Auto Part store. He ran the codes and came up w/ 2 fuel sensor related readouts - employee recommended a fuel cleaner and advised I fill up w/ gas - it was low. Less than an 1/8 tank, but no low fuel light, yet. It was on my to do list!

Anyway, traffic was heavy, i was nervous to get back on the road to get to gas station, so had husband come drive it - i followed to gas station, he had no performance issues those few blocks down the road. Filled up and drove it 15 miles home - no loss of power/performance issues.

Husband took it to our mechanic and by the time they got around to test driving it, the check engine light turned off. They read the history and found same sensor codes, but couldn't tell what the issue was.

2 weeks later - last night i go to start the car, again, gas is aBOVE 1/8 tank and it struggles to start, before i get out of driveway, check engine light comes on...i get to gas station 1 mile away, fill it - drove it about 60 miles round trip last night and this morning - no performance issues. Get to mechanic this morning, by the time they go to read codes, check engine light is off again - historical codes read the same and also at one point read that there was 0% fuel in the tank when it threw the code last night.

So - what is up!?? is my fuel sensor(s)/pump garbage? Is my fuel gauge totally inaccurate and i'm basically out of gas when i'm around 1/8 tank?? We have a 10 hour drive coming up in a couple of weeks for which we REALLY don't want to be dealing w/ loss of power w/ our 3 kids in the car, driving from NC to FL...quite frankly, i'm scared to death at this point!
NBunner32! is offline  
post #2 of 27 (permalink) Old 04-04-2019, 03:24 PM
Senior Member
 
Thomcat's Avatar
 
Join Date: Jul 2015
Posts: 1,633
Best guess - Could be a blocked screen on the fuel intake or a defective fuel pump but would get similar results from a fuel cap with a stuck or fluky vent.



For my .02 - The first, easiest and cost free check should be fuel tank cap. If the vent on the cap is inoperative, a vacuum is pulled on the fuel in the tank, increases as fuel is used and eventually engine fuel starves. Won't set a separate code if blocked but effects could trigger other codes



If blocked failure condition will vary depending upon volume of gas in tank and rate and length it is being used. Problem may go away with time and letting it sit if there is slight if leakage back into the tank. Easy to test/diagnose - when it happens simply remove and replace the gas cap (if really bad might hear a slight vacuum sound when unscrewed) - if it is a bad gas cap vent the power will immediately resume.

Current Chevys -'19 Silverado RST;'18 Malibu LT Redline;'18 Traverse Premier Redline<br /><br />Previous&nbsp; Chevys:16 Silverado LT;16 Malibu LT2;'17 Impala;'16 MalibuLT;'15 Camaro LS;'15 Traverse; '13,'12 and '07 Avalanche LTs; '11 Tahoe LT; '13 &'11 Malibu LTs; '08 Trailblazer;'06 Colorado WT..... Chrysler era.....'80 Citation;'75 Impala;'72 Chevelle;'69 Camaro R/T;'65 Impala SS;'62 Nova
Thomcat is offline  
post #3 of 27 (permalink) Old 04-04-2019, 03:36 PM
Senior Member
 
Join Date: May 2011
Posts: 218
You should never drive a car with such low gas. The fuel pump is cooled by the gas and when it is low, the pump gets hotter, shortening or ending it's life. Also, junk that is floating around gets sucked up into the filter/pump when you run it that low on gas. That's for the pump in the tank. The high pressure pump, I have not idea on, but if it can't get gas fed to it, it can't pressurize it in the cylinder.
NBunner32! likes this.
Jcbecker28 is offline  
post #4 of 27 (permalink) Old 04-04-2019, 04:16 PM
Senior Member
 
Join Date: Nov 2008
Posts: 10,809
Nbunner32, is your vehicle an AWD?

2010 FWD LT1-Gold Mist Metallic- seats 8.
Build Date- July 31, 2009-2nd day of Spring Hill 2010 production.

2013 Equinox 3.6L - 83,000
2010 Traverse 3.6L- 148,000
2003 Trailblazer 4.2L- 181,500
rbarrios is offline  
post #5 of 27 (permalink) Old 04-04-2019, 04:23 PM Thread Starter
Junior Member
 
Join Date: Oct 2017
Posts: 6
Yes, I believe so.
NBunner32! is offline  
post #6 of 27 (permalink) Old 04-04-2019, 04:24 PM
Senior Member
 
Join Date: Nov 2008
Posts: 10,809
hold.....

2010 FWD LT1-Gold Mist Metallic- seats 8.
Build Date- July 31, 2009-2nd day of Spring Hill 2010 production.

2013 Equinox 3.6L - 83,000
2010 Traverse 3.6L- 148,000
2003 Trailblazer 4.2L- 181,500
rbarrios is offline  
post #7 of 27 (permalink) Old 04-04-2019, 04:26 PM
Senior Member
 
Join Date: Nov 2008
Posts: 10,809
Engine Performance and Fuel Range Conditions

March 29, 2019



A lack of engine performance along with an incorrect low fuel range display may be found on some

2017-2018 Acadia, Enclave, Traverse and XT5 models equipped with the 3.6L V6 engine (RPOs LFY, LGX) and all-wheel-drive (AWD).

The following DTCs also may be set in the Engine Control Module (ECM):
  • P018B: Fuel Pressure Sensor Performance
  • P2635: Fuel Pump Flow Performance
  • P0461: Fuel Level Sensor 1 Performance
  • P0462: Fuel Level Sensor 1 Circuit Low Voltage
  • P0463: Fuel Level Sensor 1 Circuit High Voltage
  • P0464: Fuel Level Sensor 1 Circuit Intermittent
  • P2066: Fuel Level Sensor 2 Performance
  • P2067: Fuel Level Sensor 2 Circuit Low Voltage
  • P2068: Fuel Level Sensor 2 Circuit High Voltage



These conditions may be caused by a partially or completely blocked port on the primary in-tank fuel pump module transfer jet manifold. The blockage of the port inhibits the suction to the fuel transfer line, which leads to an inability to transfer fuel from the secondary side on fuel tanks of AWD models.
AWD models have a fuel tank with a saddle configuration in order to provide space for the driveshaft through the center area of the fuel tank. Because of the saddle shape of the tank, two fuel tank fuel pump modules are required. (Fig. 15) Fuel is drawn from the secondary side of the fuel tank, through the fuel transfer pipe, to the primary side of the fuel tank.





To diagnose this condition, check fuel lever sensor resistance for both fuel level sensors at the x350 connector (Chassis Harness to Fuel Tank Harness). (Fig. 16) If the primary and secondary sensors are both at 250 ohms, it indicates that the entire tank is empty and the transfer of fuel is occurring. Check the operation of the fuel gauge. However, if the primary sensor is at 250 ohms, but the secondary sensor is less than 250 ohms, it indicates that the primary side is empty, yet the secondary side has fuel.





Using care, lower the fuel tank, leaving any remaining fuel on the secondary side. Verify the transfer hose is connected to the secondary sender base and the fuel level sensor moves freely. Also check the function of the primary fuel level sender verify that it sweeps freely with no interference. Both fuel level sensor readings sweep from 40-250 ohms.
If there is fuel on the secondary side and there are no other concerns, replace the primary fuel pump module. If the primary fuel pump module is found to be the cause, only replace the pump module and not the fuel level sensor.
Next, confirm fuel level sensor resistance for both fuel level sensors at the x350 connector and compare to the initial readings.
Install the fuel tank (with the fuel on the secondary side) and add a gallon of fuel, which will go to primary side. Start the engine and allow time for the primary fuel pump module transfer jet to pull the fuel from the secondary side.
Measure the x350 connector fuel level sensor resistances and verify that the secondary fuel level sensor resistance goes toward approximately 250 ohms and the primary fuel level sensor resistance goes down from 250 ohms toward 40 ohms.
Refer to Bulletin #18-NA-365 for additional information.
Thomcat and NBunner32! like this.

2010 FWD LT1-Gold Mist Metallic- seats 8.
Build Date- July 31, 2009-2nd day of Spring Hill 2010 production.

2013 Equinox 3.6L - 83,000
2010 Traverse 3.6L- 148,000
2003 Trailblazer 4.2L- 181,500

Last edited by rbarrios; 04-04-2019 at 04:29 PM.
rbarrios is offline  
post #8 of 27 (permalink) Old 04-04-2019, 04:35 PM Thread Starter
Junior Member
 
Join Date: Oct 2017
Posts: 6
I shared this w/ my mechanic because I don't speak this language Thank you VERY much for the information!!
NBunner32! is offline  
post #9 of 27 (permalink) Old 04-05-2019, 04:03 PM Thread Starter
Junior Member
 
Join Date: Oct 2017
Posts: 6
Quote:
Originally Posted by rbarrios View Post
Nbunner32, is your vehicle an AWD?
Actually...it's NOT! sorry!
NBunner32! is offline  
post #10 of 27 (permalink) Old 04-06-2019, 06:37 AM Thread Starter
Junior Member
 
Join Date: Oct 2017
Posts: 6
Quote:
Originally Posted by Jcbecker28 View Post
You should never drive a car with such low gas. The fuel pump is cooled by the gas and when it is low, the pump gets hotter, shortening or ending it's life. Also, junk that is floating around gets sucked up into the filter/pump when you run it that low on gas. That's for the pump in the tank. The high pressure pump, I have not idea on, but if it can't get gas fed to it, it can't pressurize it in the cylinder.
. In regard to this, I'm not arguing with you, but trying to figure out how/why (after driving an Outlook and a traverse prior to this 2017 traverse) and never, on a regular basis, running the tank to the fuel light, let alone completely low, did I not have this issue prior? Additionally, if driving with 1/4-1/8 of a tank left is considered running it LOW, why doesn't the add fuel light come on at that point, on an effort to save a crappy pump system from the effects you've listed? I'm mostly just preparing my complaint to GM. Finally, I read exactly 217 references to fuel in my owners manual, and not one mentions the need to ensure keeping gas above 1/8 tank to preserve life of pump. Very rarely do I even allow this car to get to a low fuel light! This is just so mind boggling!
NBunner32! is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevy Traverse Forum: Chevrolet Traverse 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










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