Random/Multiple Cylinder Misfire Detected
2018-2018 Audi A6 3.0L Supercharged V6
The 2018 Audi A6 is equipped with a 3.0L V6 engine. Below you'll find detailed p0300 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
The PCM has detected misfires occurring in multiple cylinders randomly. This is different from a single-cylinder misfire and often points to a system-wide issue.
Symptoms
- Check Engine Light (flashing if severe)
- Rough idle
- Vibration
- Loss of power
- Hesitation
- Poor fuel economy
- Possible catalyst damage
Common Causes
- Vacuum leak
- Low fuel pressure
- Faulty spark plugs (all)
- Ignition coil pack failure
- EGR valve stuck open
- Low compression (multiple cylinders)
- Wiring harness issue
- MAF sensor problem
Diagnostic Steps
- Check for vacuum leaks (smoke test)
- Test fuel pressure
- Inspect spark plugs
- Test ignition coils
- Check fuel injectors
- Test compression
- Check MAF sensor
- Monitor fuel trim values
Repair Notes
Start with spark plugs and vacuum leaks. Flashing CEL means severe misfire - stop driving to protect catalytic converter.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P0300 on Other Vehicles
Common Questions
What does code P0300 mean on a 2018-2018 Audi A6?
P0300 stands for "Random/Multiple Cylinder Misfire Detected". The PCM has detected misfires occurring in multiple cylinders randomly. This is different from a single-cylinder misfire and often points to a system-wide issue.
What are the symptoms of P0300 on a Audi A6?
Common symptoms of P0300 include: Check Engine Light (flashing if severe), Rough idle, Vibration, Loss of power, Hesitation, Poor fuel economy, Possible catalyst damage.
What causes P0300 on a 2018-2018 Audi A6?
Common causes of P0300 include: Vacuum leak, Low fuel pressure, Faulty spark plugs (all), Ignition coil pack failure, EGR valve stuck open, Low compression (multiple cylinders), Wiring harness issue, MAF sensor problem.
Last updated: March 2026