OBD-II Code · Fuel & Air
P0264
Cylinder 2 Injector Circuit Low
Severity
high
Left alone, this one tends to take other parts with it.
Can you drive it
Not for long
Driving on this one risks further damage. Get it to a shop rather than carrying on with it.
Indicative cost (USD)
$100–$500
Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
Cyl 2 injector low voltage.
How a shop works this
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.
Note every code that is set, not just this one.
Codes that appear together usually narrow the cause faster than any one of them read alone.
Read the freeze frame — the conditions the fault was recorded under.
Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.
Confirm the fault is current rather than history.
Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.
Then work the likely-causes list in the order shown.
That order is what a shop checks first for this code — wiring and connections before the component they run to, because a connector costs nothing to inspect and is a common answer.
If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.
Common symptoms
- Misfire cyl 2
- Check engine light
Likely causes
- Failed injectorMost common
- Wiring short
Read the full diagnostic procedureP0264 indicates the ECM has detected cylinder 2 injector circuit current below the expected threshold during commanded pulses, pointing to a shorted…
P0264 indicates the ECM has detected cylinder 2 injector circuit current below the expected threshold during commanded pulses, pointing to a shorted injector coil, a short to ground in the injector harness, or a failed low-side driver in the ECM.
Cheapest diagnostic
ohm the cylinder 2 injector across its two pins with the connector unplugged — saturated drivers should read 11-17 ohms, low-impedance peak-and-hold injectors read 1.5-4 ohms; anything below the low end of the platform's spec indicates winding shorted-turns. Check harness routing along the intake — V-engines run cylinder bank harnesses across the valley and chafe against intake bolts and EGR brackets, particularly on GM trucks and Mopar Hemi platforms. Backprobe the injector control wire and use a noid light or low-current clamp to verify the ECM is still pulsing; if pulses are present and ohms are good, the injector itself is internally shorted under heat. Caveat: a fuel-fouled injector that drags excessive current at startup can intermittently trip P0264 while cold and clear when warm — capture freeze-frame ECT to determine if the fault is thermal.
Vehicle-specific patterns2007-2013 Chevy Silverado 5.3L (LMG/LC9) — same harness chafe pattern as cylinder 1, second injector position from front of intake.
- 2007-2013Chevy Silverado 5.3L (LMG/LC9) — same harness chafe pattern as cylinder 1, second injector position from front of intake.
- 2006-2010Jeep Grand Cherokee 5.7L Hemi — cylinder 2 injector internal short under prolonged heat soak, replace injector 05037479AA.
- 2005-2009Ford Mustang 4.6L 3V — injector connector EV1-style pin fretting, replace pigtail before full injector.
- 2007-2012Nissan Frontier/Xterra 4.0L (VQ40DE) — injector harness rub-through behind the upper intake plenum, repair harness and reloom.
Estimated repair$80 to $550.
Look up another code
P0264 — frequently asked
What does a P0264 code mean?
Cyl 2 injector low voltage.
What causes a P0264 code?
Common causes: Failed injector; Wiring short.
What are the symptoms of a P0264 code?
Typical symptoms: Misfire cyl 2; Check engine light.
Is it safe to drive with a P0264 code?
Not for long. Driving on this one risks further damage. Get it to a shop rather than carrying on with it. Estimated repair: $100-$500.
How do I diagnose a P0264 code?
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed. 1. Note every code that is set, not just this one. 2. Read the freeze frame — the conditions the fault was recorded under. 3. Confirm the fault is current rather than history. 4. Then work the likely-causes list in the order shown.
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