Need help with a P0463 code? It can be hidden by a cover or a dead end connector. If the P0420 code is combined with other codes, try fixing the other codes first. YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. How do you troubleshoot code P0463? P0420 Ford Description The Engine Control Module monitors the switching frequency ratio of heated oxygen sensors 1 front O2 sensor and heated oxygen sensors 2 rear O2 sensor. Viewers should only seek the help of a trained professional located at a licensed auto repair shop for any fix, modification, alteration, or any change to their vehicle. More times than not, this code has no implications and will go away for good when cleared. As the fuel level changes, the movable arm either rises or drops, which brings the contact point of the arm into contact with different parts of the variable resistor.
This will initiate the code gathering sequence which be produced in the form of two digits. Typically, the highest voltage reading will be five volts, and any voltage reading outside the normal range set by the manufacturer will result in a P0463 code. If the gauge needle does this, both the sender unit and associated wiring are fully functional. Note that not all applications will set the code if damage to the fuel tank occurs. What repairs can fix the P0463 code? How serious is the P0463 code? What causes the P0463 code? Tech notes As the code description implies the P0420 code means that the vehicle's control module has detected that the three-way catalytic converter is not working properly is not as efficient as the factory is expecting.
Step 4 If the code persists despite all electrical values falling within specifications, test the sender unit itself by unplugging it from the system where it connects to the wiring harness. It also goes without saying that all connections of hoses and lines must be made to industry standards during reassembly to avoid the possibility of leaks or other issues. No further action will be needed if the code never returns. Most new applications are fitted with magnetic fuel gauges that depend on a varying magnetic field to deflect the indicating needle. Make repairs or replace wiring as required to ensure that all readings fall within specifications, clear all codes, and retest the system to see if the code returns. On my way to the last.
Come along as we show you how to quickly diagnose a common concern with fuel sending units caused by sulfur in gasoline. All that will happen in this case is that the fuel gauge reading will not reflect changes in the actual fuel level in the tank. FordTechMakuloco shall not be liable for any injury, damage, or loss to any person or property that may result from use of the tools, equipment, or any content contained in this video. While the basic operating principles of fuel level sender units are much the same across all manufacturers, there are two notable exceptions to this rule. A three way catalyst converter Manifold with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2. The fuel level sensor output voltage changes depending on the movement of the fuel mechanical float. In addition, there is no way to guarantee that the video is not altered or modified or is not in the final form submitted by FordTechMakuloco and therefore, FordTechMakuloco does not warrant that the video is unaltered or not modified.
Re-attach the fuel level sensor assembly to the fuel pump housing, making sure that both the signal wire and the ground wire are routed through the gap between the fuel level sensor assembly and the fuel pump bracket. This code is not an immediate danger to the vehicle, but it can put you in a dangerous, or at least inconvenient situation. This limit is set by Ford before your vehicle ever left the factory. The image below shows the typical construction of a fuel pump canister. Greater values indicate a malfunction in the input circuit. In practical terms, this is accomplished by means of a float that is attached to a moveable arm, the other end of which is in contact with a variable resistor.
For vehicles that can be serviced with a kit, go to Step 4. In terms of operation, fuel level sender units use variable resistors to indicate the actual fuel level in the tank. Compare all obtained readings to those stated in the manual, but pay particular attention to the ground wire s and connection s , since the sender unit relies on a sound ground to work at all. When the frequency ratio of heated oxygen sensors 1 and 2 approaches a specified limit value, the three way catalyst malfunction is diagnosed. Therefore, viewer agrees to release, waive, and discharge FordTechMakuloco or anyone affiliated with FordTechMakuloco, from any and all liability, claims, demands, actions, and causes of action whatsoever arising out of or related to any loss, damage, or injury, including death, that may be sustained by the viewer, or to any property belonging to viewer, regardless of whether the loss is linked to the use of the contents of this video, or otherwise and regardless of whether such liability arises in tort, contract, strict liability, or otherwise, to the fullest extent allowed by law.
The flashing will pause then start again delivering the sound part of the code such as 5 creating the code 25. Step 1 Record all codes present, as well as all available freeze frame data. Remove the fuel pump assembly from fuel tank. Note however that on some applications the needle may move rather slowly, so allow enough time for the needle to reach its point of maximum deflection before drawing any conclusions from this test. As oxygen storage capacity decreases, the heated oxygen sensor 2 switching frequency will increase. Also be aware that the fast response time seen on a magnetic fuel gauge is a function of its design, and it does not indicate a short circuit as it sometimes would on a purely resistance-type gauge. In no way should the contents of the video, including the tools used, be repeated or tried by anyone.
I've had it to 3 different mechanics and no one can figure out what's going on. However, I have a bit of a problem. Look for damaged, burnt, disconnected, shorted, and corroded wiring, connectors, and fuses. Be aware that not all level sender units are incorporated into the pump canister; on some applications the sender unit is mounted separately. While some aftermarket fuel additives might assist in removing the varnish deposit, the better option is to replace the fuel level sensor unit.
If your vehicle stalls due to lack of fuel in traffic, the situation could be very dangerous, as well. The links on this video to products are for informational purposes only and in no way are an endorsement of the safety or effectiveness of the particular product. There are just a few symptoms that a driver may detect when the P0463 code is stored. Viewers understand that anything contained in this video or linked to or from this video is the sole responsibility of the viewer and in no way provides an express or implied warranty as to the safety or effectiveness of any linked tool, product, or video. Torque the fastener at the bottom of the fuel level sensor assembly to 1 Nm 9 lb. Make repairs as required, clear all codes, and retest the system to see if the code returns.
The difference between the two voltage drop tests should not be greater than about 100 millivolts. Therefore, regardless of whether the tank is full or empty, the controller expects to see a predefined signal voltage that corresponds to that state, which means that if say, a short circuit or any other problem creates a resistance that is inconsistent with either state, the controller will set code P0463 and illuminate a warning light. Step 2 Consult the manual on the location, function, color-coding, and routing of all wiring and fuses associated with the fuel sender unit, and perform a thorough visual inspection of all wiring. Note the fuel level sender unit that forms part of the canister. To keep it from coming back, these behaviors need to be corrected by the driver. The fuel level sensor consists of two parts, one is mechanical float and the other side is variable resistor. I just got my code scanner and have used it a few times.