Installing a flex fuel sensor in your car is relatively straightforward, however there are a couple of considerations you will need to keep in mind. If you want to fit the sensor on the fuel feed line to the engine rather than the return line, you can choose to split the fuel line into two and run it through the fuel composition sensor as well as directly to the engine in parallel. It may be a 4cyl but its not flex fuel and that dtc cannot be set by a 02 by your scan tool is out dated or your putting in the wrong year information. These are the exact same symptoms you'll experience if your car has a P0178 code. There is a three wire harness connector. Either way, your engine will default to a predetermined value, which means that it won't be able to switch from regular fuel to flex fuel as it should.
My engine light turned on at about 60, 000 miles. However, this doesn't mean it can run that way forever. 2. you got some bad information your scan tool. Not many manufactures use the code P0178. When I started my truck up after the install, the engine light was still on. When you're driving down the road, the last thing you want to deal with a check engine light that pops up on the dash. The fuel composition sensor is typically tested by flowing a known gas mixture through the sensor and measuring the output. OBD-II Trouble Code Technical Description.
Causes of Code P0178. The actual specifications from Continental suggest that the sensor is capable of operating at up to 10 bar or 145 psi which won't be an issue for most applications. Last edited by mitchs10; July 21st, 2010 at 1:05 AM. Replacing the Fuel Cap. What are the Symptoms of Code P0178? Flex Fuel Composition Sensor. While you can run your vehicle with a P0178 code for a little while, it's better to get it repaired as soon as possible. Received 0 Likes on 0 Posts.
This provides positive location and means there's no way that the fuel line can come off. To all of you out there that are running across this problem, I'm sorry!!! Hello, I was searching the internet on anything related to the fuel composition sensor for gm. Failure of the power control module (PCM). Your vehicle only has this sensor if it can utilize flex fuel, and it's what tells your engine the current makeup of ethanol in the fuel. This information is used to adjust the air/fuel ratio in the engine to optimize performance and emissions. What are the most common repairs? If you're experiencing problems with your fuel composition sensor circuit, the first thing you should do is check the wiring. Visually inspect the circuit connections and wiring.
Which is why GM only put these stupid things on 2000-2002 trucks. Regular priceUnit price per. Last edited by tech2; February 26th, 2014 at 10:00 PM. Although that is the most typical issue, other issues could arise. A 2002 does not have a fuel composition sensor. I took it back down to get checked and they were able to perform the smog check. Are you 18 years old or older? Disconnect the two fuel lines. So you'll only see a loss in engine power, jerky starts, and more fuel consumption. E85 compatible vehicles no longer use an alcohol sensor to determine and adjust for the alcohol content of the fuel in the tank.
This is one of my favorite tests for testing current carrying capabilities of a circuit. You will also needa 3/8" Fuel Line Disconnect tool. 2014-2020 Nissan Rogue. If the fuse is still good, check the voltage at the sensor. An important point to understand is that for reliable and consistent ethanol readings, the sensor must see a constant flow of fuel through it. This generic powertrain diagnostic trouble code (DTC) typically applies to all OBD-II equipped vehicles including but not limited to Ford, BMW, Chevy, Pontiac, Mazda, VW, Honda, Scion, Land Rover, etc. For example, replacing the sensor costs between $500 and $600 in labor and supplies. If you still need help regarding the P0178 trouble code, please post your question in our FREE car repair forums. Power Control Module (PCM) update needed. By far, the most common cause of a code P0178 is a faulty fuel composition sensor. When your engine displays the P0178 code, the sensor is either not producing any readings or producing readings outside the normal range. Last Updated on March 30, 2021.
Lastly, your Power Control Module may have an issue (PCM). You do not want the leaky gas to ruin the plug! Death Wobble (Common Causes and How to Fix It) - March 1, 2023. Follow these simple guidelines to prevent misdiagnosis: Engine starting and running issues could occur if excessive water is in the fuel and the sensor cannot detect it. You most likely have a PCM issue if there isn't a break between the PCM and the fuel composition sensor. They give you the code as you rush it to the parts store. P0178 Fuel Composition Sensor Circuit Low Input. MAKE SURE YOU REMOVE THE FUEL LINES BEFORE UNPLUGGING THE SENSOR!!! ) Failure of the fuel composition sensor. Resistance or no continuity is an indication of faulty wiring that must be repaired or replaced. If we place the sensor on the return line then this can present a problem if we're nearing the limit of the fuel pump's flow capability. I searched but cannot find diagnostic information. 3 liter and P0178 code.
10. thank you so much for sharing such a detailed account of how to change this sensor, i followed ur direction to the tee and saved the cost of sending it to a mechanic. The job itself can be a bit of a pain, and the sensor isn't much cheaper either. This is what I do: I install a fused jumper wire with the correct sized terminal ends for what I am working on. I hope this helps someone who comes across this problem in the future. The engine may misfire, hesitate and stall. The last thing you want to deal with while driving is a check engine light on the dash. Note: The advanced steps become very vehicle specific and require the appropriate advanced equipment to perform accurately. But when it does happen, it can be a panic-inducing. Former Service Manager & Air Force Mechanic. Any time we're dealing with the fuel system, it's important to take precautions to ensure the reliability of the connections. Please Note: This sensor output must be wired to a Digital input (SPI or DPI). 00 the sensor worked for me, my service lit is off and im service lite free, i did replace the fuel filter, and the two oxigen sensors the whole thing cost about $170. The fuel you currently use will be one of the most important aspects influencing your car's symptoms when it has the code P0178.
It is not intended as repair advice and we are not responsible for any actions you take on any vehicle. 3 L Now why I know is I shouldn t be getting this codes because my truck isn t a flex fuel motor so I need help figuring why I m getting this code and how to fix it... - 1968 Chevy C-10 with 5. Used to measure ethanol content. E85 Flex Fuel Description. Can't wait for California to shaft us even more for future smog certs. Damaged or restricted fuel line. The bracket is mounted to the frame rail with (2) 1/2" is on the top side of the rail, the other is on the back side. Just too bad parts cost so much more for flex-fuel vehicles. I took it around the neighborhood for about 5 minutes and to my surprise, the engine light was off. You'll get an upfront price for the suggested once they've identified the issue.
You'll typically be unable to use flex-fuel since the Engine Control Module (ECM) defaults to a value. The sensor is installed and the FCS frequency reading is now within specifications. I had changed the quite pricey filter about 30K miles back, but... With labor, replacement of the O2 sensor, the flex-fuel filter, and the composition sensor, it was a costly smog certificate. Hello I have an issue with my non flex fuel 2002 Chevy Tahoe z71 5. Call around if you have to and find a used one.
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