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P0261 is a diagnostic trouble code (DTC) for "Cylinder 1 Injector Circuit Low". 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.
Cylinder 1 Injector Circuit Low
This trouble code indicates that the powertrain control module has detected a lower reference voltage coming from the number 1 cylinder’s fuel injector than what was specified by the vehicle manufacturer.
The fuel injector on the number 1 cylinder may have a broken or weak internal return spring which could cause the reference voltage level to decrease.
The wiring or connector that is associated with the number 1 cylinder could be having or causing a connection issue and connection issues may also cause voltage levels to decrease or become inaccurate.
The powertrain control module could be operating improperly.
Symptoms of this trouble code that the driver could potentially experience would include:
A mechanic may diagnose this trouble code by locating the number 1 cylinder’s fuel injector.
Once the fuel injector on the number 1 cylinder has been located, the mechanic would test the fuel injector using the manufacturer’s suggested procedure. This test will reveal if the internal spring has failed due to the reference voltage that is produced by the fuel injector during this test.
Next, the mechanic would check the wiring and connector that are associated with the fuel injector on the number 1 cylinder for damages.
If the problem has still not been located after these tests have been performed, the powertrain control module may be at fault and would be tested by the mechanic. Once a determination has been made by the mechanic, he/she would share this information with the customer.
A common mistake would be to replace the fuel injector on the number 1 cylinder without inspecting its circuitry for damages. Although a failed injector is the most common cause of this trouble code, it is not the only cause, therefore all other possible causes of this issue should be proven not to be the cause.
Any trouble code related to a malfunctioning fuel injector is a serious issue. This can affect the way your engine runs and, if put on the back burner, can cause engine damage. It is best to have this issue diagnosed and repaired as soon as possible in order to keep your vehicle’s engine in good running condition.
Replacing the fuel injector on the number 1 cylinder
Repairing or replacing wiring or connectors that are associated with the fuel injector on the number 1 cylinder
Replacing the powertrain control module
Regular fuel system maintenance such as fuel system cleanings can help to prevent obtaining a trouble code such as this. These cleaners will run through the fuel injectors, providing the lubrication that the small internal parts need to prevent the potential of broken return springs inside the fuel injector. This service should be done at least once a year but for best results, do it at every oil change.
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