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My 02 L300 gas gauge, mot working, check engine light on, poor acceloration

Tiny
GOMEZ23
  • MEMBER
  • 2002 SATURN L300
  • 150,000 MILES
I was messing with the a/c cycle switch because my a/c wasent working and I was putting direct power from the battery, when I was doing something started clicking while I was doing it and then the car died but then it started right up but then my gas gauge whent all the way to empty my check engine light turnd on, slow acceloration started, when I turn the check engine light of with the scaner my gas gas light turns on for a couple of seconds then it turns of then the check engine light turns back on can someone help?
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Monday, June 25th, 2012 AT 7:13 PM

13 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
So did you add power at the ac pressure switch on the ac line?So what codes are you reading in the computer?Is there anything else not working besides the gas gauge?
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Monday, June 25th, 2012 AT 7:20 PM
Tiny
GOMEZ23
  • MEMBER
  • 6 POSTS
Sorry I wasent adding power I was just cheking the power on the pressure switch, I was getting a p1283, P0453, P0463, P0405, P0402, the gas gauge is the only gauge not working
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Monday, June 25th, 2012 AT 7:39 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
You have some egr codes a gas pedal position sensor position sensor code a fuel tank pressure sensor code and a fuel level sensor code.I think your looking at a 5 volt refrence circuit issue or a ground issue. Do you have a scan tool that reads live engine data?
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Monday, June 25th, 2012 AT 8:58 PM
Tiny
GOMEZ23
  • MEMBER
  • 6 POSTS
Yes I could get ahold one, thank u so much for ur help
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Monday, June 25th, 2012 AT 9:14 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Your welcome keep me posted.
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Monday, June 25th, 2012 AT 9:54 PM
Tiny
GOMEZ23
  • MEMBER
  • 6 POSTS
Ok so what do I look for on the scaner?
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Tuesday, June 26th, 2012 AT 6:59 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Now here comes the tricky part I dont know what inputs your scan tool will be able to read on that car. Hook up the scan tool and read live engine data on the car see if it displays the egr valve app sensor or fuel tank pressure sensor/ftp sensor voltages?Let me know what you find.
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Tuesday, June 26th, 2012 AT 4:52 PM
Tiny
GOMEZ23
  • MEMBER
  • 6 POSTS
Sorry I just got back I had to go out of town for a few weeks but ill hook it up to the scaner first thing tomorrow. Sorry for the hold up
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Friday, July 27th, 2012 AT 5:45 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Thats ok keep me posted.
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Friday, July 27th, 2012 AT 9:09 PM
Tiny
GOMEZ23
  • MEMBER
  • 6 POSTS
Tank pressure (v 5.00),
Tank prs mmHg21:9
App 1 v. 0.41
App 2 v. 2.49
App at idle- yes
EGR sensor (v) o
One thing I forgot to mention is that my cruise control isn't working either.
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Monday, July 30th, 2012 AT 7:32 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Your fuel tank pressure sensor is reading like the sensor is stuck it shouldnt read 5 volts with the gas cap off it should read about 1.5 volts. Also your egr sensor is reading 0 volts that should read around .5 volts or so when closed. Lets start by trouble shooting the code P0405 and see where that leads.
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Monday, July 30th, 2012 AT 10:12 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Heres the trouble tree for the code P0405 let me know what you find.
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Monday, July 30th, 2012 AT 10:16 PM
Tiny
RANDY DOZIER
  • MEMBER
  • 1 POST
I had this exact same thing happen to me on my 2000 ls1 with the v6. I was wondering if anyone found out what caused the problem because mine is still messed up
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Thursday, January 21st, 2016 AT 4:46 PM

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