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P0262 OBD-II Trouble Code: Cylinder 1 Injector Circuit High

Check Engine Light

P0262 code definition

If trouble code P0262 shows up on an OBD-II scanner it’s because the fuel injector servicing the number one cylinder is experiencing a current draw that’s above average.

What the P0262 code means

The number one cylinder in the vehicle isn’t working right or even not at all because of a problem occurring in the circuit. Like any OBD-II code, this generic one is common amongst all vehicles. However, it’s important to understand that the prognosis for the issue will most likely be different across manufacturers.

This is because the problem could stem from something like one of the manufacturer’s plants simply receiving a bad set of fuel injectors. There are other examples that could be responsible too like a defective component that resides inside the circuit which is limited to just some models.

The best way to figure out what exactly P0262 represents is to begin by going online and checking with the Technical Service Bulletins (TSBs). These bulletins provide up-to-date information about unique problems concerning specific makes and models. Every mechanic should have access to these bulletins and, assuming the issue has affected enough vehicles, this is where you’ll find the most accurate definition for the P0262 code.

What causes the P0262 code?

As we just touched on, the cause for this problem could be one of any number of problems that happened during the vehicle’s manufacturing. However, some common reasons for it are:

  • A malfunctioning electrical connector located on the fuel injector
  • A fuel injector that has become dirty or plugged
  • A fuel injector that is shorted internally and therefore causes high-voltage draws
  • A malfunctioning electrical harness between the PCM (Powertrain control Module) and the injector

Again, it’s important to check for a TSB that may describe what exactly is going wrong.

What are the symptoms of the P0262 code?

There could also be countless symptoms that accompany the P0262 code depending on what the cause behind it is. These are the ones you’re most likely to experience, though:

  • Poor fuel economy
  • The engine runs rough when idling
  • The vehicle won’t accelerate well or there is an overall lack of power

How does a mechanic diagnose the P0262 code?

The following are the steps a mechanic should follow for diagnosing the problem that triggered a P0262 code to be stored:

  • First, they will want to check their TSBs for any information that may help diagnose the underlying issue.

  • Then, they’ll use an OBD-II scanner to find out if any other codes had been stored by the PCM.

  • Generally, they’ll next inspect the fuel injector, as this tends to be responsible.

  • It would also be smart to ask the owner about what kind of fuel they use as ethanol is going to cause fuel injector problems in small engines

Common mistakes when diagnosing the P0262 code

Not checking for bulletins is a big mistake made by mechanics who have already seen this code once before and automatically assume they know it’s the same thing this time too. These bulletins don’t take long to check but could make the problem clear in a couple of minutes and even explain how to fix them.

How serious is the P0262 code?

Any problem that affects the drivability of a vehicle should be taken seriously if for no other reasons than that it could be a problem that eventually turns into far more expensive ones in a very short period of time.

What repairs can fix the P0262 code?

Here are the most likely repairs necessary for clearing this code:

  • Repairing or replacing the wiring of the fuel injector
  • Cleaning the fuel injector
  • Repairing or replacing the fuel injector harness

Additional comments for consideration regarding the P0262 code

Even if a vehicle is just having a tough time idling, it’s essential to address the P0262 code right away. If you keep pushing a faulty fuel injector to respond like it was designed to despite problems challenging its performance, you will eventually experience something far worse.

Need help with a P0262 code?

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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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