OBD-II Code · Fuel & Air
P0282
Cylinder 8 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)
$50–$760
Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
Cyl 8 injector shorted to ground (rear-bank V8).
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 8
- Check engine light
Likely causes
- Shorted injectorMost common
- Harness chafe at rear-bank heat shield
Read the full diagnostic procedureP0282 sets when the PCM detects the cylinder 8 injector circuit pulled low or shorted to ground; the driver sees a current path it should not when no…
P0282 sets when the PCM detects the cylinder 8 injector circuit pulled low or shorted to ground; the driver sees a current path it should not when not commanding the injector on.
Cheapest first
- swap injector 8 with a known-good neighbor and recheck.
- PFI windings ohm at 11 to 17, GDI at 1.5 to 4; shorted windings drop below 9 ohms PFI or below 1 ohm GDI. With injector unplugged and key on, the driver-side terminal should read open to ground; 0 ohms to chassis ground indicates a harness short, very common where the loom passes the rear exhaust manifold heat shield.
- Pulse width at warm idle should be 2.5 to 4.5 ms PFI / 0.3 to 0.6 ms GDI; if pulse width on cyl 8 collapses to near 0 ms while the PCM still commands it, the driver has gone into protection.
- Caveat: GDI systems with a separate injector driver module (Ford EcoBoost, BMW N20/N55, GM Gen V GDI) will throw cylinder-specific lows on a failing IDM with no harness or injector fault present.
Vehicle-specific patterns2007 to 2013 GM 5.3L LMG/LC9 trucks have a known harness melt issue on the driver-side bank near the exhaust manifold heat shield bolt; 2008 to 2010…
- 2007to 2013 GM 5.3L LMG/LC9 trucks have a known harness melt issue on the driver-side bank near the exhaust manifold heat shield bolt;
- 2008to 2010 Ford 6.4L Powerstroke diesel sets cylinder-specific lows from cracked injector pigtail solder joints under the valve cover, Ford TSB 09-12-7;
- 2005to 2010 Mercedes M273 5.5L V8 with Bosch HDEV-1 GDI injectors fails windings around 80k to 120k miles.
Estimated repair$50 to $760.
Look up another code
P0282 — frequently asked
What does a P0282 code mean?
Cyl 8 injector shorted to ground (rear-bank V8).
What causes a P0282 code?
Common causes: Shorted injector; Harness chafe at rear-bank heat shield.
What are the symptoms of a P0282 code?
Typical symptoms: Misfire cyl 8; Check engine light.
Is it safe to drive with a P0282 code?
Not for long. Driving on this one risks further damage. Get it to a shop rather than carrying on with it. Estimated repair: $50-$760.
How do I diagnose a P0282 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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