P0284
PPowertrainCylinder 8 Contribution/Balance Fault
What does this code mean?
Severity : MediumP0284 reports a cylinder 8 contribution or balance fault. The control module measures crankshaft speed changes on each combustion stroke and sees that cylinder 8 produces less work than the others. This code mainly affects diesel engines and often points to that cylinder's injector.
Symptoms
- Check engine light on.
- Rough idle and vibration.
- Loss of power.
- Possible exhaust smoke.
Possible causes
- Dirty, worn or leaking cylinder 8 injector.
- Injector wiring fault.
- Low compression on cylinder 8.
- Fuel supply problem.
- Incorrect injector coding after replacement.
Diagnosis and repair
- Inspect the cylinder 8 injector connector and wiring.
- Read per-cylinder fuel corrections in live data.
- Perform an injector leak-off test and a compression test.
- Have the injector tested or replaced, then check its coding.
- Clear the code and road test.
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Code
P0284
Category
Powertrain
Prefix
P
Standard
OBD-II / SAE J2012