FAULTBASE
NEWSASKCars
© 2025 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
Home/Cars/Genesis/G70/IG (2017-2023)/how to fix P0302 code in Genesis G70 IG (2017-2023)

how to fix P0302 code in Genesis G70 IG (2017-2023)

Genesis G70 IG (2017-2023)

Severity: highDifficulty: mediumError Code: P03022-4 hours
3 min read
546 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix P0302 cylinder 2 misfire in Genesis G70 (2017-2023). Step-by-step guide with diagnostic procedures and repair instructions.

Error Code
P0302
Component
Engine
Repair Time
2-4 hours

Safety Warnings

  • ⚠Disconnect the battery before working on electrical systems.
  • ⚠Allow the engine to cool before opening components to prevent burns.

Symptoms

  • •Check engine light illuminated
  • •Rough idle or engine shaking
  • •Decreased acceleration or power
  • •Engine stalling or hesitation during acceleration
  • •Poor fuel economy
  • •Increased emissions

Diagnostic Steps

  1. 1Scan for error codes using an OBD-II scanner to confirm P0302.
  2. 2Inspect the ignition coil and spark plug in cylinder 2 for visible damage or wear.
  3. 3Conduct a compression test on cylinder 2 to check for mechanical issues.
  4. 4Check fuel injector operation on cylinder 2 by using a noid light.
  5. 5Inspect the wiring and connectors related to the ignition system and fuel injector on cylinder 2.

Solution

Solution

1. Preparation

  • Gather necessary tools and parts.
  • Disconnect the battery to prevent electrical shorts.
  • Allow the engine to cool before starting work.

2. Remove Ignition Coil and Spark Plug

  • Tools Required: Ratchet and socket set, torque wrench.
  • Remove the engine cover if applicable.
  • Disconnect the electrical connector from the ignition coil.
  • Remove the ignition coil by unbolting it from the cylinder head.
  • Use a spark plug socket to remove the spark plug from cylinder 2.

3. Inspect and Replace Components

  • Inspect: Check the spark plug for fouling, wear, or damage. Look for cracks or excessive carbon buildup.
  • Replace: If the spark plug is worn, install a new spark plug with the correct heat range as specified by the manufacturer.
  • Replace Ignition Coil: If the ignition coil is defective, replace it with a new one.

4. Check Fuel Injector

  • Tools Required: Noid light, multimeter (if necessary).
  • Connect a noid light to the fuel injector connector to check for pulse signal while cranking the engine.
  • If the noid light does not illuminate, inspect the wiring and connectors. Repair or replace as needed.
  • If the injector is faulty, remove and replace the fuel injector for cylinder 2.

5. Reassemble and Connect Battery

  • Reinstall the spark plug and ignition coil.
  • Reconnect the electrical connector and any other components that were removed.
  • Reconnect the battery.

Verification

After completing the repair, verify that the issue has been resolved:

  • Test the affected component to ensure it functions correctly
  • Check for any error codes or warning lights
  • Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • OBD-II scanner
  • Ratchet and socket set
  • Torque wrench
  • Noid light
  • Multimeter

Parts Required

  • Spark plug (for cylinder 2)
  • Ignition coil (for cylinder 2)
  • Fuel injector (if necessary)

Additional Information

Error CodeP0302
Component

Engine

Repair Time

2-4 hours

Difficulty

medium

Severity

high

Tools

5 items

Parts

3 items

Related Faults

Discover similar issues

  1. my Genesis G70 struggles to accelerate, what's the issue

    Discover how to diagnose and fix acceleration issues in Genesis G70. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

    Component:Engine
    Symptoms
    • •Engine stalling during acceleration
    • •Hesitation or lag when pressing the throttle
    • +{count} more
  2. why does my Genesis G70 hesitate when I press the gas

    Learn how to diagnose and fix hesitation issues in Genesis G70. Step-by-step guide with diagnostic procedures and repair instructions.

    Component:Engine
    Symptoms
    • •Hesitation or lag in acceleration
    • •Engine stalling during acceleration
    • +{count} more
  3. why does my Genesis G70 overheat in traffic but not on the highway?

    Learn how to diagnose and fix overheating issues in Genesis G70. Step-by-step guide with diagnostic procedures and repair instructions.

    Component:Cooling System
    Symptoms
    • •Engine temperature gauge rises significantly in traffic
    • •Coolant temperature warning light illuminated
    • +{count} more
  4. my Genesis G70’s brakes feel spongy what can cause this

    Learn how to diagnose and fix spongy brakes in Genesis G70. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

    Component:Brakes
    Symptoms
    • •Spongy brake pedal feel
    • •Longer stopping distances
    • +{count} more
  5. what causes my Genesis G70 to shake when I accelerate

    Learn how to diagnose and fix shaking during acceleration in Genesis G70. Step-by-step guide with diagnostic procedures and repair instructions.

    Component:Suspension
    Symptoms
    • •Vibrations felt through the steering wheel or chassis during acceleration
    • •Possible loss of power or uneven acceleration
    • +{count} more
  6. how to tell if my Genesis G70 fuel pump is failing

    Learn how to diagnose and fix fuel pump failure in Genesis G70. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

    Component:Fuel System
    Symptoms
    • •Check engine light illuminated
    • •Engine sputtering or misfiring
    • +{count} more

Share this solution

Comments

Sign in to share your thoughts

Sign In

No comments yet

Be the first to share your thoughts

Back to Generation