Visually check the connector for damage or broken wires. If you do not have access to a tester, swap the injector with another one and see if the code changes. Make sure you have the correct wire. It gave code p0204 Injector Circuit Malfunction. Since it is a coil of wire, it is going to develop a voltage spike when current is suddenly turned off. Voltage may be checked at the fuel injector and it may pass fine, then a noid light is installed only to find the pulse width is not correct for the fuel injector. Check for voltage at the fuel injector connector.
What causes the P0204 code? The cylinder 4 fuel injector is the most common cause of P0204, especially on higher mileage vehicles, but that does not mean it does not need to be tested. Once a failsafe mode is set, it will remain until the code is cleared, the fault is fixed, or a normal range is achieved. If the code changes, then change the injector. What repairs can fix the P0204 code? Just measure the voltage dips over a given range of divisions on the scope trace. It should have 10 volts or more.
The better alternative is to swap that injector with one of the other ones, then see if the fault code sets for the other cylinder. With the severity of some of these symptoms, caution is advised. They aren't likely to short because the terminals are too far apart. If you measure that wire with the injector plugged in, you'll find full battery voltage on both of them. YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. P0204 can cause mild symptoms like poor gas mileage and the Check Engine Light being present, but it can also cause serious issues that will cause the engine to run poorly, be difficult to keep running, or die without being able to restart it.
Need help with a P0204 code? The computer grounds that wire when it wants to turn the injector on. The test fails when the fuel injector does not operate electrically even though the harness assembly and fuel injectors test satisfactorily. Information given in this video does not guarantee the desired outcome. If the injector operates, then you likely have either an open in the wiring, or a blocked injector. What does the code mean? However, also includes disassembly instructions for interior trim panels and exterior items like headlights and tail lights.
If you have access to an injector tester, activate the injector and see if it operates. How serious is the P0204 code? If the injector operates, then you likely have either an open in the wiring, or a blocked injector. Visually check the injector for damage. Cyl 1 circuit looks just like inj 2 circuit electrically Really don't see that many failed computers. For that to fail, a wire inside would have to corrode or break off, which isn't likely, and the open circuit would be easy to identify. If you do not have access to a tester, swap the injector with another one and see if the code changes. That won't show up with a resistance test because the industry standard of plus or minus ten percent is okay so it can be normal to find a half ohm difference between two good injectors.
Make sure you have the correct wire. Resistance tests also won't show up an intermittent electrical problem inside the injector. Also, if arcing has taken place inside the injector between some of the loops of wire, a carbon track will be left behind. Visually check the injector for damage. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Any injury, damage or loss that may result from improper use of the tools, equipment, or the information contained in this video is the sole responsibility of the user and not Auto Repair Guys.
Everything is purchased by us! In some cases, a fuel system cleaner, such as Seafoam, can be used to clean varnish and contaminants from the fuel system. Often the injector will still open normally with 12 volts, but that spike will be partially-shorted out, and the computer will interpret that as a defect. So you have to refer to the factory legends to learn the identification symbols and then refer back to circuit diagrams to find the splice and ground locations. There's more to testing an injector than the resistance tests. Bad ecm, thx for all responses. We did not push it in all the way when we installed the wiring harness.
Visually check the connector for damage or broken wires. The voltage appears on the ground wire because it's coming through the injector. Check for voltage at the fuel injector connector. How does a mechanic diagnose the P0204 code? Scan tools that allow technicians to view live data and the changes that occur over time are needed to diagnose codes such as P0204 on modern cars. That is part of the strategy of how the Engine Computer watches for a problem.
P0204 tells technicians a malfunction was found for cylinder 4 injector circuit. . Some of the adjacent coils of wire could short, and that would affect how the valve opens. So Ford wants you to perform a generator frequency test to diagnose the problem. That is conductive and will make it easier the next time for a spark to occur there. Unlike the cheaper Haynes and Chilton manuals that cover multiple year models, leaving the exact information you need to fix your car, these professional manuals cover your exact year, make, model. Divide the number of dips by the number of divisions to get an average voltage dip.
If you have access to an injector tester, activate the injector and see if it operates. If some of the coils of wire are shorted out, that spike will be lower than normal. Is this looking like a bad driver in ecm? This may be a cheaper alternative to try before replacing the fuel injector. They warn not to replace the generator alternator unless if fails the frequency test. Injectors can become clogged by particles and fail to operate. If you need to dig into your doors, dash or console, Alldatadiy. If the code changes, then change the injector.