OBD-II Generic Error Code P0264: How to Fix It

Medium 1-2 hours Medium Severity Verified June 2026
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Error Code
P0264
Brand
OBD-II Generic
Product Type
automotive
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
1-2 hours
Error code P0264 indicates that the powertrain control module (PCM) has detected a low voltage or short to ground in the electrical circuit for the fuel injector on cylinder 2. This can cause a misfire, rough idle, or poor performance. The fix typically involves checking the injector, wiring, and connector.
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Tools You'll Need

How to Fix Error Code P0264

  1. Safety First: Disconnect Battery

    Always disconnect the battery before working on electrical components.

  2. Locate Cylinder 2 Injector

  3. Inspect Connector and Wiring

  4. Test Injector Resistance

    Be careful not to damage the pins or contacts.

  5. Test Power and Ground at Connector

    Do not probe while the engine is running.

  6. Perform a Noid Light Test

    Fuel may spray; work in a well-ventilated area.

  7. Replace Faulty Injector or Repair Wiring

    Use a new seal and torque to spec when installing a new injector.

Parts You May Need

Fuel injector (cylinder 2)
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Injector wiring harness or connector
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Fuel injector (cylinder 2)
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Injector wiring harness or connector
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Fuel injector (cylinder 2)
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Injector wiring harness or connector
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Fuel injector (cylinder 2)
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Injector wiring harness or connector
Check Price on Amazon
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When to Call a Professional

If the wiring repair is extensive or the injector is difficult to access (e.g., on a diesel engine), consider a professional mechanic. Also, if the code returns after repairs, further diagnosis of the PCM may be needed.

Frequently Asked Questions

Can I drive with error code P0264?
It's not recommended. The cylinder 2 injector circuit is low, which can cause a misfire, rough running, and potential catalytic converter damage. Have it fixed as soon as possible.
What causes error code P0264?
Common causes include a faulty fuel injector (internal short), damaged wiring or connector, a blown fuse, or a problem with the PCM (less common).
How much does it cost to fix P0264?
DIY cost is $20-$100 for a multimeter and replacement injector. Professional repair ranges from $150-$400 depending on labor and parts.
Will a bad injector cause P0264?
Yes, a shorted injector is a common cause. The resistance test can confirm if the injector is faulty.
What is the difference between P0261, P0262, and P0264?
P0261 is injector circuit low for cylinder 1, P0262 is high for cylinder 1, and P0264 is low for cylinder 2. All indicate circuit voltage issues.

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