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Fuel level sensor

False fuel level readings

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Posted on Jan 02, 2017

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wildman554
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SOURCE: check engine lite on.

my wifes truck has same problem, better off changing the whole fuel pump. the fuel level sensor is on the casing for the fuel pump. mine as well replace pump since you have to drop the tank anyway. before you order one, check on the drive side door jam to see what month you axiom was built. this is an important factor in ordering your fuel pump. sounds stupid i know but trust me. alot of parts for the axiom depend on the month.

Posted on Dec 26, 2011

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1 Answer

Would a bad oil pressure switch cause a no start on a 98 b2500


Hi,
Symptoms of a bad or failing Engine Oil Pressure Sensor
  • Oil Pressure Light comes on, and you check the engine oil level, But oil level is okay, you can blame the false reading on the sensor.
  • Oil Pressure Light blinking constantly. This is the normal >check< oil pressure sensor Warning that the sensor is going out.
  • If the sensor is giving false readings, Dispite oil level, the sensor could be replaced.
If the Sensor is currently not working, and does not warn you of engine oil level, and oil level gets extremely low, The Engine could burn up/stall due to lack of oil, and may not restart.
Then you could probably blame it on the sensor.
But really would be lack of oil.

Intermittent No Start,
Common causes deal with 3 basic systems/areas of engin
  1. Compression, its the build up of air and fuel into the engines cylinders. Then is compressed by the pistons. And is under pressure. FAILURE An Air leak (vacumm leak) will allow pressure to escape.
  2. Ignition System, good battery, good relays, wires are not loose or disconnected, good 10volts to starter, 10volts to distributer>gives 20kvolts to spark plugs>has strong spark to ignite compressed air in cylinders. Other sensors need to work. Crankshaft sensor(ccs) Throttle Position Sensor(TPS), +more
  3. Air/fuel Ratio, Air Intake Manifold, and Fuel Pressure Sensor *Fuel Injection Pressure Sensor---if car is fuel injected*, air filter is clean and intake manifold hose, Throttle Plate Acuater, Idle Air Contro Valve(IAC). Also vacumm leak cause no start. To much air not enough fuel will cause lean fuel mixter==low power, low idle, no start.......To much fuel not enough air will cause rich fuel mixter==too much fuel could cause engine knock, flooding of engine wet spark plugs, No Start
Scan Vehicle computer for Codes, Places like AutoZone---Discount AutoParts will connect scanner for free, And Code Will say What is wrong with Vehicle,

Mar 08, 2017 | Cars & Trucks

1 Answer

Fuel guage sometimes read empty when there is gas in the tank?


Check that there are no holes in the float. If the fuel is getting into the float, it will give a false reading. Another thing is to check the ground on the float sensor. If it's not connected tightly, it will create a false reading too.

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2001 Subaru legacy p0340 and p0462


Camshaft position sensor and Fuel level sensor .. respectively.. One may has caused the other to trigger ending with a false reading on one or the other. The one for the camshaft is easiest to replace.

Aug 29, 2014 | Cars & Trucks

1 Answer

My fuel gage is giving me a false reading on my peugot partner 1.8L van,how can I fix this problem?


The usual reasons for intermittent fuel readings are that a wire is loose from the sending unit in the tank or on top of the tank, the connection is not making good contact. If you are getting no reading and it was intermittent or "false" reading at different levels of gas in the tank, the sender unit in the tank is broken. It needs to be replaced.

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1 Answer

Engine light code p0455 chev monte carlo


Hello,The problem is that the EVAP system is not able to achieve or maintain vacuum during the diagnostic testThe control module tests the evaporative emission (EVAP) system for a large leak. The control module monitors the fuel tank pressure (FTP) sensor signal to determine the EVAP system vacuum level. When the conditions for running the test are met, the control module commands the EVAP canister purge solenoid valve OPEN and the EVAP canister vent solenoid valve CLOSED . This allows engine vacuum to enter the EVAP system. At a calibrated time, or vacuum level, the control module commands the EVAP canister purge solenoid valve closed, sealing the system, and monitors the FTP sensor input in order to determine the EVAP system vacuum level. If the system is unable to achieve the calibrated vacuum level, or the vacuum level decreases too rapidly, the PCM will set the code you now have.So, you either have a stuck open purge valve, a stuck open vent valve, a false reading fuel tank pressure sensor, or a cracked/broken EVAP line.

Sep 21, 2012 | 2004 Chevrolet Monte Carlo

1 Answer

Check engine lite on. car reader indicator ( PO463 fuel level senor circuit high input). Feuel gauge do not work proper, give a false reading with a full tank.


my wifes truck has same problem, better off changing the whole fuel pump. the fuel level sensor is on the casing for the fuel pump. mine as well replace pump since you have to drop the tank anyway. before you order one, check on the drive side door jam to see what month you axiom was built. this is an important factor in ordering your fuel pump. sounds stupid i know but trust me. alot of parts for the axiom depend on the month.

Sep 17, 2011 | 2002 Isuzu Axiom

1 Answer

Gas tank fuel level sensor location


the fuel sending unit is located on the fuel pump itself,located on the side of your fuel pump inside of the gas tank itself.you'll need to replace the entire fuel pump in order to solve fuel level issues. the fuel tank will have to come out,and then the fuel pump removed and replaced.it really stinks to have a bad fuel guage reading false,only to find out that the entire fuel pump has to be replaced to solve a false reading . feel free to call your local autozone or advance autoparts store for details. but here is a hint" the more fuel in your tank at the time of replacement of the fuel pump,the more expensive it will be.due to the fuel tank being "heavy" that has been my expereince so far. good luck and thank you for choosing fixya.com

Mar 27, 2011 | 1996 Chevrolet C1500

3 Answers

What would cause this vehicle to use execessive gas.


1) dirty air filter

2) vacuum leak

3) false reading from mass air flow sensor

4) false reading from coolant temperature sensor

5) improper tires inflation

6) topping off gas when fill-up (soaking emission lines with fuel)

7) Positive Crankcase Ventilation (PCV) and breather element clogging

8) Exhaust Gas Recirculation(EGR) Valve stuck with carbon and EGR passage tube is block with carbon.

9) low or dirty transmission fluid + filter (if it's an automatic)

10) excessive load

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1 Answer

Temperature gauge is inaccurate and check engine light comes on but its not over heating and everything else is fine can it be a sensor ? The temperatue gauage didn't read anything for months but now...


Have you checked the antifreeze level lately? Low antifreeze will cause a temp sensor to give false readings. Does your heater work OK, as in does it blow hot air when heater is on? that is another symptom of low antifreeze.

As far as the check engine light coming off and on, I would bet it is the oxygen sensor that might need to be replaced.

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Service engine light comes on when gas tank 1/2 full


The fuel level sensor located on the fuel pump is giving a false reading. You need to have the fuel level sensor replaced. or the fuel pump replaced. The sensor might not come seperately

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