[Z06] PCM 1431 Right Fuel Sender Code
Thread Starter
Le Mans Master
Joined: Jun 2001
Posts: 7,331
Likes: 518
From: Admit Nothing, Deny Everything, Make Counter Accusations.
PCM 1431 Right Fuel Sender Code
I got this code a few times this week. The fuel gauge goes to the minimum value, the "Low fuel" message comes up, and the "Check Gauges" light comes on. I can clear the code while driving and all the lights go out and the fuel gauge goes back to the correct reading.
Anyone else get this?
Anyone else get this?
Drifting
Joined: Nov 2001
Posts: 1,684
Likes: 0
From: Jacksonville Florida
Re: PCM 1431 Right Fuel Sender Code (rbartick)
Ross,
I get everything you describe except no codes. Usually happens when I am under 1/4 tank, gauge works normally only after I fill it up. Next time I will search for a code.
I am told that this is a common problem in C5's, but admit I haven't researched it like I need to.
Les
I get everything you describe except no codes. Usually happens when I am under 1/4 tank, gauge works normally only after I fill it up. Next time I will search for a code.
I am told that this is a common problem in C5's, but admit I haven't researched it like I need to.
Les
Le Mans Master
Joined: Jun 2000
Posts: 5,555
Likes: 9
From: Indiana
Re: PCM 1431 Right Fuel Sender Code (rbartick)
I used to get the P1431 whenever my fuel level would get to about 3/8 tank. This code is thrown when the computer thinks the fuel level in the right tank has not changed enough over a certain period of time. It assumes it can't read the fuel level properly, throws the P1431, and sets the fuel gauge to zero, which of course triggers the 'low fuel' and 'check gauges' messages.
For me, switching from convenience store gas to a name brand (Phillips 66 in my case) has stopped the problem completely ... haven't had an occurence in several thousand miles.
GM has blamed high-sulfur fuel, stating that it chemically interacts with silver in the fuel sender. There's a TSB calling for a reflash of the computer (apparently they've changed the detection algorithm). Being a lazy sort of guy, I'd try a) changing fuels for a couple of tanks to see if that helps, b) failing that, get the reflash, c) failing that, service department for a new fuel sender or jet pump.
[Modified by Jerry Velders, 9:19 AM 11/26/2003]
For me, switching from convenience store gas to a name brand (Phillips 66 in my case) has stopped the problem completely ... haven't had an occurence in several thousand miles.
GM has blamed high-sulfur fuel, stating that it chemically interacts with silver in the fuel sender. There's a TSB calling for a reflash of the computer (apparently they've changed the detection algorithm). Being a lazy sort of guy, I'd try a) changing fuels for a couple of tanks to see if that helps, b) failing that, get the reflash, c) failing that, service department for a new fuel sender or jet pump.
[Modified by Jerry Velders, 9:19 AM 11/26/2003]
Melting Slicks
Joined: Oct 1999
Posts: 2,181
Likes: 421
From: Ponte Vedra Beach FL
Re: PCM 1431 Right Fuel Sender Code (Jerry Velders)
Ross,
3 weeks ago I ran my car out of gas....no *RESERVE FUEL*, no *LOW FUEL*....gage needle was just approaching the orange zone....so why would I think it's empty?! :cuss Did the gas can walk to get it started, filled it, gage went to full. Then it went to 3/4, then full, then 1/4...and remained totally erratic, right to the point where it was showing 1/4 tank and stumbling on fumes as I took it to the dealer a week later. I ran it as low as I could (too damn close!) so there would be no problems in pulling the tanks, if required.
Code 1431, of course. Dealer replaced right side sender and now it's perfect....gage is fine, low fuel warning are there, etc.
Anyway, I guess my point is that the needle didn't default to zero, which would at least cause a guy to pull into a station pronto and fill up. And then, when you only get 10 gallons in a 'dead empty' tank, you know sumptin's up!!
[Modified by Tracy, 7:28 PM 11/26/2003]
3 weeks ago I ran my car out of gas....no *RESERVE FUEL*, no *LOW FUEL*....gage needle was just approaching the orange zone....so why would I think it's empty?! :cuss Did the gas can walk to get it started, filled it, gage went to full. Then it went to 3/4, then full, then 1/4...and remained totally erratic, right to the point where it was showing 1/4 tank and stumbling on fumes as I took it to the dealer a week later. I ran it as low as I could (too damn close!) so there would be no problems in pulling the tanks, if required.
Code 1431, of course. Dealer replaced right side sender and now it's perfect....gage is fine, low fuel warning are there, etc.
Anyway, I guess my point is that the needle didn't default to zero, which would at least cause a guy to pull into a station pronto and fill up. And then, when you only get 10 gallons in a 'dead empty' tank, you know sumptin's up!!
[Modified by Tracy, 7:28 PM 11/26/2003]
