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Old Nov 2, 2011 | 05:00 AM
  #1  
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Default Fuel gauge problem

Hello,

I filled up the tank yesterday, and when i started the engine, the fuel gauge read 0, and the DIC says LOW FUEL and SERVICE FUEL SYSTEM, and i also have the ENGINE light ON.

Any ideea what could happen?


And off-topic, there is a noise behind the radio area, like a clicking (like some wires short circuiting). It doesn't have a specific pattern. Usually it clicks when the ignition is in accessory mode, and i press the brake pedal or so. It sounds like a relay clicking.

Someone had this "gremlin" issue? I have no smoke or smell in the car, no power loss anything. But i just wonder if it is normal.

Thanks.
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Old Nov 2, 2011 | 10:39 AM
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Originally Posted by dj_lex
Hello,

I filled up the tank yesterday, and when i started the engine, the fuel gauge read 0, and the DIC says LOW FUEL and SERVICE FUEL SYSTEM, and i also have the ENGINE light ON.

Any ideea what could happen?
Pull the code. In all likelihood it will be the passenger side fuel level sender. If so, you may be able to buy more time by pouring a bottle of Techron in the tank.
Originally Posted by dj_lex
And off-topic, there is a noise behind the radio area, like a clicking (like some wires short circuiting). It doesn't have a specific pattern. Usually it clicks when the ignition is in accessory mode, and i press the brake pedal or so. It sounds like a relay clicking.
The brake lamp relay is audible and there are relays that click when you hold down the ignition switch. This is normal.
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Old Nov 2, 2011 | 10:40 AM
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Check out this thread.

It happened to me once while driving.

http://forums.corvetteforum.com/c6-c...ce-on-dic.html

Good Luck!
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Old Nov 2, 2011 | 11:07 AM
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Default Low fuel

dj_lex,
This sounds like there might be something wrong with the electrical system. I'd highly recommend taking it to the dealership and having them take a look at it. Let us know what you find out.

Chevrolet Customer Service,
Justin


Originally Posted by dj_lex
Hello,

I filled up the tank yesterday, and when i started the engine, the fuel gauge read 0, and the DIC says LOW FUEL and SERVICE FUEL SYSTEM, and i also have the ENGINE light ON.

Any ideea what could happen?


And off-topic, there is a noise behind the radio area, like a clicking (like some wires short circuiting). It doesn't have a specific pattern. Usually it clicks when the ignition is in accessory mode, and i press the brake pedal or so. It sounds like a relay clicking.

Someone had this "gremlin" issue? I have no smoke or smell in the car, no power loss anything. But i just wonder if it is normal.

Thanks.
Reply
Old Nov 2, 2011 | 02:01 PM
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From: Constanta
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Thank you. I'll try to pull the code today, and see what i get. I'll keep you posted.

Regarding the audible relay sound, i'll look more into the electrical system. :-)

Hope for the best.
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Old Nov 2, 2011 | 02:18 PM
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This just happened to my C5 last Saturday. Pull the codes via the DIC. You're looking for P1431 "Fuel Level Sensor 2 Circuit Performance" or similar. Clearing that code resolved my problem. So far, so good. If it happens again, I may try the Techron trick.

Last edited by Neil B; Nov 2, 2011 at 02:21 PM.
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Old Nov 2, 2011 | 02:36 PM
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Originally Posted by Neil B
This just happened to my C5 last Saturday. Pull the codes via the DIC. You're looking for P1431 "Fuel Level Sensor 2 Circuit Performance" or similar. Clearing that code resolved my problem. So far, so good. If it happens again, I may try the Techron trick.



This is what I did.
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Old Nov 2, 2011 | 04:15 PM
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From: Constanta
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My code is "P0463 fuel level sensor circuit high pressure". Erasing it didn't solve the problem. The gauge showed 1/2 tank for few seconds and then the dic warning came again and the needle went dead too.

I presume the passenger side sensor as a colleague stated above.

Is the sensor hard to replace? Can it be done without removing the tank?

Thank you!
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Old Nov 2, 2011 | 05:59 PM
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This used to happen fairly often on my C5, and apparently is common with C5's. I used Techron, and it seemed to clear it up after I reset the codes. However, last winter I used more Stabil than usual in my car before putting it away. When I put it back on the road for this past season, I had no repeat of this issue at all. I see that alot of folks like to put Seafoam in the fuel tank too for storage. You might try using any of these products to see if it helps.
I would run the car to about 1/4 of a tank, add the amount of Stabil required, and then fill the car with Shell Super. It seemed to work.
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Old Nov 2, 2011 | 06:16 PM
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Originally Posted by dj_lex
My code is "P0463 fuel level sensor circuit high pressure". Erasing it didn't solve the problem. The gauge showed 1/2 tank for few seconds and then the dic warning came again and the needle went dead too.

I presume the passenger side sensor as a colleague stated above.

Is the sensor hard to replace? Can it be done without removing the tank?

Thank you!
IIRC, the tank(s) must be removed, a major job. I'm thinking that the labor alone is something like $1,000. Others will have more precise numbers.

The Techron thing seems to work for many people, I'd certainly try a couple of tankfuls with a bottle of Techron (or GM Fuel System Ttreatment, allegedly the same thing) before tearing the car apart.

Also, be sure to use only Top Tier gas.
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Old Nov 2, 2011 | 10:39 PM
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Originally Posted by Gearhead Jim
IIRC, the tank(s) must be removed, a major job. I'm thinking that the labor alone is something like $1,000. Others will have more precise numbers.

The Techron thing seems to work for many people, I'd certainly try a couple of tankfuls with a bottle of Techron (or GM Fuel System Ttreatment, allegedly the same thing) before tearing the car apart.

Also, be sure to use only Top Tier gas.


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Old Nov 3, 2011 | 02:25 AM
  #12  
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well, the part with replacing the sensor, is not a very good option. I'll try a fuel treatment and we'll se what happens.

Is there any problem that can occur, if i run the car like this? Or just the inconvenience of not knowing how much fuel in the tank you have left?

The CEL light doesn't seem to affect the engine's performance...

Thank you.
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Old Nov 11, 2011 | 03:19 PM
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Hi Dj,
I have the same problem (code P2066) ..when i fill up the tank the fuel gauge will still show empty and then after a while it becomes full and then it behaves erratically.The issue is that the fuel sensor on the right tank is gone bad..However this does not affect driving the car ,only issue is not know how much gas is in the tank.Its not too bad actually and i have been driving my c6 like for almost 4 months now.The cost of fixing this is close to $1700 and i am little skeptical of having the tank removed.Tried techron and it didnt work in my case..Also always filled octane 91..
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Old Nov 11, 2011 | 03:38 PM
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If the Techron doesn't work the first time try it again. Also pay attention to news reports for people complaining their gas gauges started to fail after getting a fill up. Was in an area where that happened about 5 years ago. Turns out one of the refinery's for the area turned out a batch of fuel that had to much sulfur content and got stuck paying for several hundred gas gauge repairs in all makes of cars. There was a definite pattern so it didn't take long for the State Attorney General's office to track down the cause and force restitution.

Bill
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Old Nov 11, 2011 | 04:06 PM
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Originally Posted by Bill Dearborn
If the Techron doesn't work the first time try it again. Also pay attention to news reports for people complaining their gas gauges started to fail after getting a fill up. Was in an area where that happened about 5 years ago. Turns out one of the refinery's for the area turned out a batch of fuel that had to much sulfur content and got stuck paying for several hundred gas gauge repairs in all makes of cars. There was a definite pattern so it didn't take long for the State Attorney General's office to track down the cause and force restitution.

Bill
about if one Techron bottle/tank doesn't do it try it again. Had this problem in my C5 and after several treatments seems to have cured it. Also put in a bottle of Techron about twice a year "just because". Hasn't happed with my C6 but I also have it on a Techron program. Also use top tier gas usually Chevron.
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Old Nov 12, 2011 | 10:13 AM
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Originally Posted by napacruzerc5
about if one Techron bottle/tank doesn't do it try it again. Had this problem in my C5 and after several treatments seems to have cured it. Also put in a bottle of Techron about twice a year "just because". Hasn't happed with my C6 but I also have it on a Techron program. Also use top tier gas usually Chevron.


My son had a similar problem with his 07, ran the car too low on fuel and filled up it some unbranded stuff. It took two fill ups with shell as well as two bottles of techron to finally resolve the problem.
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Old Nov 12, 2011 | 12:49 PM
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I had that same problem with my 07. Lucky for me it was under warranty. The dealer replaced the sensor/sending unit in the tank.
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Old Nov 12, 2011 | 05:47 PM
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Also don't let your vette sit too long with a near-empty tank. If you know you won't be driving it for at least a week make sure you have a full tank. If you have a sulfur heavy gas it seems to effect the sensors more when the tank is near-empty. No factual proof of this; just seems to work better for me.
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Old Nov 12, 2011 | 10:46 PM
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Just had the sensor on my 07 replaced because of very similar problem, DIC code was p2068. Of course it doesn't do that now but now only indicates half full when the tank is actually full. Gotta take it back to see if they can fix it right.
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Old Nov 14, 2011 | 04:55 AM
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Well, i drove about 100 miles with the car and still no reading. I presume that after the right tank will empty, the gauge will start indicating, as after i clear the code, the gauge reads 1/2 - which tells me the passenger side sender works. :-)

I checked in my area, and unfortunately, i have no Techron solution in stores, so i will have to go with some other additive.

As for the gas, we only have 95 or 98 OCTANE, and i usually go for the 95- obviously because it's cheaper.

I'll try to fill it with the 98 a few times to see if that changes something.
I don't know if the octane rating from here is the same as yours in the States...

The thing is that the guy i bought the car from, used to drive with not more than 1/2 tank, as this wasn't his daily driver and he said he wasn't willing to keep 100 dollars in gas for nothing. Stupid guy!!! I usually fill up my tank every time, no matter if i drive the car or not.

So i think the additive or better fuel might not solve the issue if the left tank stood empty for a long time. But who knows, maybe i get lucky :-)

Thanks
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