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p0300
Moderate
Audi · SUVs
Random/Multiple Cylinder Misfire Detected
Quick Answer
Error code P0300 on your Audi SUVs means: Random/Multiple Cylinder Misfire Detected. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
F3FY4M4MNGENGE
Likely Causes
  1. Worn or fouled spark plugs
  2. Failing ignition coil packs
  3. Vacuum leaks causing lean misfires across multiple cylinders
  4. Low fuel pressure from a failing fuel pump
  5. Carbon buildup on intake valves in direct injection engines
How to Fix It
1
Review misfire counter data to identify which cylinders are most affected
2
Inspect and replace spark plugs if gap is out of specification or electrodes are worn
3
Swap ignition coils between cylinders and recheck to isolate a faulty coil
4
Test fuel system pressure and injector operation
5
Perform walnut blasting or chemical intake valve cleaning if carbon buildup is suspected
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Spark plugs
Ignition coil packs
Fuel filter
Intake valve cleaning kit
Related Error Codes
P0171P0174P0302P0420P0430
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