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P0277 is a diagnostic trouble code (DTC) for "Cylinder 6 Injector Circuit High". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
This code means that there is an injector circuit malfunction affecting cylinder six.
When this code appears, the ECM (engine control module) has reported that either the resistance of voltage for the fuel injector circuit for cylinder six is out of specification.
There are four main reasons P0277 may be displayed:
There are a number of symptoms you’ll want to look out for that are all signs of the underlying problem causing the P0277 code. The first is the ECM illuminating the Check Engine light. The ECM may also enact failsafe mode. It’s doing this because the P0277 code represents an issue that could actually damage your vehicle from within. Failsafe mode will remain on until the circuit’s performance is restored to within the acceptable limits or the fault is simply repaired.
If your engine is running poorly, that could also be a symptom. Unfortunately, this symptom may give way to a much more serious one: your engine completely dying. After that, it may refuse to restart. Even if it doesn’t die, you may find it very difficult to get the engine to start. Misfiring is also a common symptom. You may also notice that your vehicle simply isn’t getting the fuel efficiency you’re used to.
To diagnose the problem, most mechanics will follow some version of the following:
More often than not, the fuel injector is behind the P0277 code. This is especially true on high mileage vehicles and is why it’s so important to comprehensively test it. Otherwise, the mechanic may move on and make a miscellaneous diagnosis of the problem.
You need to be careful about driving a vehicle that is displaying the P0277 code. If one of the symptoms you’re experiencing is the engine running poorly, you really shouldn’t drive it at all. Instead, get it looked at by a professional ASAP.
The higher the mileage is on your vehicle, the more likely that contamination has built up during this time. As time goes on, the likelihood of seeing P0277 increases. To help combat this, clean out your fuel system.
Mechanics may use all kinds of specialty tools to diagnose P0277. One example would be a noid light set. This is an effective and quick way to check the pulse width. They can also test the fuel injector.
A grade scan tool will most likely be used as well. Professional-level scanners list all codes present, but also make it easy to check for injectors and sensors operating properly.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.