bigrigfixer, May 29, 2015 #1. If you DO have 12 volts to the fuel gauge, the next step is to remove the fuel sending unit wire, and, with the ignition key “on”, ground the sender wire to a good chassis ground. Fuel gauge reading wrong. Has anyone bought a fuel pump assem from this … As the tank empties, this float drops and slides a moving contact along the resistor which increases its resistance. The 2007 Hyundai Santa Fe has 36 problems reported for fuel gauge not reading correctly, check engine light on. Some cars use other indicators like “1” for full tank and “0” or “R” for an empty tank. This poses a problem since the driver must know the correct fuel level of the car so he or she won’t run out of fuel. If the internal circuit fails, the gas gauge may only work in one section, such as between EMPTY and HALF or between HALF and EMPTY. Over time, gasoline corrodes the fuel gauge sensor. A bad fuel gauge resistor can transmit a bad signal to the instrument cluster, causing the gauge to permanently read full. These tests should allow you to identify the problem, but be careful of modern computer-controlled instrument clusters and fuel gauges, since they can be confusing to diagnose and fix. Wait a few moments as some fuel gauges take a long time to respond. But when both the input and output voltage are correct, it likely means you have a circuit issue between the fuel gauge and sending unit. The good news is, you can troubleshoot the problem yourself and avoid an expensive repair. • The resistance wire in the sender is broken. February 12, 2018. Save my name, email, and website in this browser for the next time I comment. Some small problems I am having is the fuel gage is reading incorrectly and the DIC is displaying wrong information, I am not sure if they are connected or not. iggys-amsoil ... At one point the gauge just stopped at above half a tank. the gauge will read fine when I first start it up but the second I get up to road speed the gauge will read full regardless of the amount of gas in the tank and the low fuel light comes on at about a half of tank. Required fields are marked *. DouggieDoodle [OP] Member. If you are diagnosing a modern vehicle, look in your owner's manual for the instrument cluster self-test procedure. The sender consists of a float on an arm that varies the resistance the sender applies to the circuit with gauge. First, start with the easiest steps. The issue is likely with the sending unit when the output voltage is incorrect. I don't want to go to the trouble of dropping the tank and changing the sending unit if the … Running low on fuel can also cause the fuel pump to pick up sediments, which clog the fuel filter, fuel injectors, or high pressure fuel pump. A faulty fuel gauge sender may cause the gauge to suddenly change positions, or give an inaccurate reading. Or what about you just went to the fuel station to fill up and your fuel gauge is reading empty when the tank is full? Learn about this problem, why it occurs, and how to fix it. Automotive Forums .com Car Chat > Pontiac > Grand Prix > Fuel Gauge Reading Incorrectly . Guest-only advertisement. A stuck fuel gauge on your car is not only annoying, it is also a hassle as you need to keep track of the number of miles you have driven since your last fill-up to prevent you from running out of fuel. I have an 88 liter, 2005 GMC sierra truck. Do the following tests to identify the source of the problem: Many modern vehicles come with an instrument cluster self test feature that can test computer-controlled instrument clusters. Popular Answer. 2005 Infiniti QX56 80,244 mi, … It's an eerie feeling to look down and see your running on empty and the motor about to explode … When the float becomes separated or somehow breaks from the arm, it may lead to a malfunctioning fuel gauge and cause it to be stuck on empty. A fuel gauge functions using a series of electrical connections from the sending unit to the gauge cluster, and when one of these connections fails, so does your fuel gauge. Some 2002-2005 Explorer/Mountaineer vehicles built on or after 3/4/2002, may exhibit the fuel gauge needle (pointer) being slow to indicate full after refueling. Removing the sending unit wire from the chassis ground the fuel gauge should go directly to “full”. Over time, the contacts can wear, which can lead to an open circuit. Re: Fuel gauge is reading incorrectly after fuel pump change. Fuel Gauge Reading Incorrectly Grand Prix Car Forums . Touch the tan wire from the body to any convenient ground and the gauge should read empty. The fuel gauge started acting up, than after a few months it's not working at all. These resistance sensors also indicate an increased failure rate with the dynamic additions of alcohol in car gasoline fuel. If your gas gauge isn't working, it's important to identify the source of the issue, then make a plan for repair. Even though figuring out that there’s something wrong with the fuel gauge isn’t terribly difficult, diagnosing the reason behind your fuel gauge reading incorrectly can be somewhat time-consuming. The Complete Guide! I opened the trunk and sat on the bummer … BKW, May 29, 2015 … This could be from a bad ground or once again related to the circuitry. Electronic and software malfunctions may cause the fuel gauge in your automobile to inaccurately measure or display the amount of fuel remaining in the gas tank. As the tank's fuel level decreases, the float drops, increasing resistance that is translated to a lower gauge reading. This is the ONLY WAY to approach these kinds of problems - period! The 2007 Hyundai Santa Fe has 36 problems reported for fuel gauge not reading correctly, check engine light on. I have a 2001 Grand Prix GT. Customer reply replied 3 years ago. A pulse-and-hold methodology is being utilized by potentiometer applications for alcohol fuel. Average repair cost is $520 at 100,100 miles. Fuel gauge stuck on empty. Most newer vehicles have a fully-integrated instrument cluster meaning if one indicator has an issue, the whole unit needs to be replaced to fix the problem. When I fill the tank it goes up to full. The fuel gauge may read incorrectly. When the fuel gauge is working when the jumper cables are connected, it means you need to replace the grounding wire on the sending unit. I picked up a used 2003 2500hd 4x4 6.0 ext cab short bed in February. Digital gas gauge reading incorrectly and inverted. 46 Posts . © 2020 Cash Cars Buyer. 5 Tips to Boost Diesel Engine Performance. The curveball in our … 2 0 0. this is my first time on here also, but I am having the same problem. Proper *TESTING* before ANY parts replacement is crucial. share | improve this question | follow | edited Apr 19 '19 at 17:08. choster. This is why there is a demand for a safe, non contact method for fuel level. Aug 9, 2019 at 3:49 PM #1 #1. Signs Your Differential Needs to Be Repaired. This usually consists of a series of steps, like turning on headlights and holding down the odometer button at start-up, which tests all the instrument panel gauges and lights. Your Sorento's fuel system allows the vehicle to run by feeding gasoline from the tank to the engine. If not, you have a wiring problem or a bad gauge. Thread starter ta9590; Start date Oct 1, 2012; Oct 1, 2012 #1 T. ta9590 New member. Average failure mileage is 166,100 miles. A broken resistor can also cause the fuel gauge to read empty. It can also TEST the fuel gauge by performing a functional test to verify gauge accuracy. See the TSB for complete details. Tags: chevrolet, avalanche 1500. Most newer vehicles have a fully-integrated instrument cluster meaning if one indicator has an issue, the whole unit needs to be replaced to fix the problem. Make sure your fuses are good, and your ground wires are clean and tight, especially under the car. I have a 1992 Mercury Grand Marquis, and I have recently been having problems with my fuel gauge. The fuel gauge sender is not a regularly serviced part. I have a 2003 Aztek and, on occasions, the gas gauge reads lower than it should and the temperature gauge reads higher than it should. Then as I drove down the road I noticed the fuel gauge was reading just under 7/8 full? If it is working, then the grounding wire should be replaced. The problem started about four months ago with the gauge reading less and less over time. The voltage must be exactly the same as when you conducted a test at the sending unit. Read on to learn the most common causes of broken gas gauges and how to identify them. Keep in mind that some steps of self-test may stop the fuel gauge at ¼, ½ and ¾. In most fuel gauges in cars these resistors are on the inward part of the gauge, for example, inside the fuel tank. It goes from empty all the way passed full and over to 100 mph on the speedometer. I remember when my dealer changed mine, they changed the fuel sender as well. Full details of their work notes are below. It puts your safety and the integrity of the vehicle in jeopardy. The first step would be to make sure that you have the proper ohm range fuel sender to match your gauges. Also keep in mind that the fuel gauge is not perfectly accurate, since the fuel tank has an irregular shape and uses only a single float.

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