Audi DTC P0302 – Worn out spark plugs, ignition wires, coil(s), distributor cap and rotor (when applicable), Incorrect ignition timing, Vacuum leak(s), Low or weak fuel pressure, Improperly functioning EGR system, Defective Mass Air Flow Sensor, Defective Crankshaft and/or Camshaft Sensor, Defective Throttle Position Sensor, Mechanical engine problems (i.e.—low compression, leaking head gasket(s), or valve problems)
DTC P0302 meaning on Audi
DTC P0302 indicates a misfire detected in cylinder number 2 of the engine. This diagnostic trouble code is part of the OBD-II system and signifies that the engine control module (ECM) has identified a problem with the combustion process in that specific cylinder. Misfires can lead to poor engine performance, increased emissions, and potential damage to engine components if not addressed promptly.
Audi DTC P0302 symptoms
Common symptoms associated with DTC P0302 may include:
- Rough idling or engine shaking
- Decreased engine power and acceleration
- Increased fuel consumption
- Check Engine Light illuminated
- Unusual engine noises
- Excessive exhaust emissions
Audi DTC P0302 causes
Several factors can contribute to the occurrence of DTC P0302, including:
- Worn out spark plugs
- Faulty ignition wires
- Defective ignition coil(s)
- Issues with the distributor cap and rotor (if applicable)
- Incorrect ignition timing
- Vacuum leak(s)
- Low or weak fuel pressure
- Improperly functioning EGR system
- Defective Mass Air Flow Sensor
- Defective Crankshaft and/or Camshaft Sensor
- Defective Throttle Position Sensor
- Mechanical engine problems (e.g., low compression, leaking head gasket(s), or valve problems)
Audi DTC P0302 seriousness
The seriousness of DTC P0302 can vary based on the underlying cause. If left unresolved, a misfire can lead to:
- Increased emissions and potential failure of emissions tests
- Damage to the catalytic converter
- Decreased fuel efficiency
- Potential engine damage over time
It is advisable to address this code promptly to avoid further complications.
How to diagnose DTC P0302 on Audi
To diagnose DTC P0302, follow these steps:
- Use an OBD-II scanner to confirm the presence of DTC P0302.
- Inspect the spark plugs and ignition wires for wear or damage.
- Check the ignition coil(s) for proper operation.
- Examine the distributor cap and rotor (if applicable) for signs of wear.
- Verify ignition timing using a timing light.
- Inspect for vacuum leaks using a smoke test or visual inspection.
- Measure fuel pressure to ensure it meets specifications.
- Test the EGR system for proper function.
- Check the Mass Air Flow Sensor for accuracy.
- Test the Crankshaft and Camshaft Sensors for proper operation.
- Inspect the Throttle Position Sensor for correct readings.
- Perform a compression test to check for mechanical issues.
How to fix DTC P0302 on Audi step-by-step instructions
To fix DTC P0302, follow these steps:
- Replace worn or damaged spark plugs.
- Replace faulty ignition wires.
- Test and replace defective ignition coil(s) as needed.
- Replace the distributor cap and rotor if they show signs of wear.
- Adjust ignition timing to manufacturer specifications.
- Repair any vacuum leaks found during inspection.
- Replace or repair components causing low fuel pressure.
- Fix or replace the EGR system components as necessary.
- Replace the Mass Air Flow Sensor if defective.
- Replace faulty Crankshaft and/or Camshaft Sensors.
- Replace or repair the Throttle Position Sensor if needed.
- Address any mechanical engine problems identified during diagnosis.
Recommended tools for Audi diagnostics
Explore our expert picks: The Best OBD2 Scanners for 2025
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.