P0263 OBD-II Trouble Code: Cylinder Number 1 Contribution/Balance Fault

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Cost of diagnosing the P0263 code

P0263 is a diagnostic trouble code (DTC) for "Cylinder Number 1 Contribution/Balance Fault". 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. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

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P0262 code definition

Cylinder Number 1 Contribution/Balance Fault

What the P0262 code means

P0262 is an [OBD-II diagnostic trouble code] which indicates that the engine control module (ECM) detected the cylinder number 1 having low contribution to the running of the engine; low power.

What causes the P0262 code?

  • The number one cylinder injector is not spraying in enough fuel or no fuel at all.

  • The number one injector is open or shorted electrically (other trouble codes would be present).

  • The fuel pressure is low or has low volume due to a clogged fuel filter or defective pump.

  • The compression in number 1 cylinder is low due to rockers, lifters, cam, rings or cylinder head gasket problems.

  • The injector O-ring is leaking compression.

What are the symptoms of the P0262 code?

How does a mechanic diagnose the P0262 code?

  • Scans codes and documents the freeze frame data in order to verify the problem.

  • Clears the engine and ETC codes to verify whether the concern comes back

  • Runs an injector electrical self test

  • Checks the fuel pressure and volume to specifications

  • Performs a crankcase pressure test

  • Checks cylinder compression and repairs as needed

  • Checks the injector O-rings and seals then replaces the injector if needed

Common mistakes when diagnosing the P0262 code?

  • Failing to verify the code returns after scanning and deleting code
  • Failing to check fuel pressure volume during diagnosis before replacing injector

How serious is the P0262 code?

A misfiring cylinder can cause the engine to run lean on the failed cylinder if it is an injector and cause the engine to blow black smoke if it has low compression in the cylinder.

What repairs can fix the P0262 code?

  • Replacing the injector and injector seals
  • Replacing the fuel filter and fuel pump
  • Repairing the engine for low compression in the cylinder

Additional comments for consideration regarding the P0262 code

Code P0262 is triggered when the crankshaft sensor does not get an acceleration of the crankshaft from cylinder number 1 power stroke indicating that the cylinder is not contributing to engine power. The injector could also be shorted or open and will cause additional codes that would go with the code P0262 pointing to the injection failure.

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 1-800-701-6220.

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