FAULTBASE
NEWSASKCars
© 2025 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
Home/Cars/Toyota/Corolla/E140 (2006-2013)/how to fix the P0301 misfire code on my Toyota Corolla E140 (2006-2013)

how to fix the P0301 misfire code on my Toyota Corolla E140 (2006-2013)

Toyota Corolla E140 (2006-2013)

Severity: highDifficulty: mediumError Code: P03012-4 hours
3 min read
590 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 P0301 cylinder 1 misfire in Toyota Corolla. Step-by-step guide with diagnostic procedures and repair instructions.

Error Code
P0301
Component
Engine
Repair Time
2-4 hours

Safety Warnings

  • ⚠Disconnect the battery before working on electrical components to prevent shorts.
  • ⚠Allow the engine to cool before working on ignition components to avoid burns.

Symptoms

  • •Check engine light illuminated
  • •Rough idle or engine shaking
  • •Decreased fuel efficiency
  • •Engine stalling during acceleration
  • •Increased exhaust emissions

Diagnostic Steps

  1. 1Scan the vehicle's OBD-II system to confirm the P0301 code and check for any additional codes.
  2. 2Inspect the spark plug for cylinder 1 for wear, damage, or improper gap.
  3. 3Check the ignition coil for cylinder 1 for signs of electrical failure or damage.
  4. 4Perform a compression test on cylinder 1 to assess mechanical integrity.
  5. 5Inspect fuel injectors, particularly for cylinder 1, for clogs or malfunction.
  6. 6Examine wiring and connectors associated with the ignition system for corrosion or disconnections.

Solution

Solution

1. Preparation

  • Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, fuel injector cleaner.
  • Ensure the engine is cool and disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

  • Sub-steps:
    1. Remove the ignition coil from cylinder 1 by unscrewing the retaining bolts and disconnecting the electrical connector.
    2. Unscrew the spark plug using a spark plug socket.
    3. Inspect the old spark plug for signs of wear or fouling; replace it with a new spark plug with the correct gap (0.043 inches).
    4. Reinstall the spark plug and torque it to the manufacturer’s specification (typically around 13 lb-ft).
    5. Reattach the ignition coil and reconnect the electrical connector.

3. Test Ignition Coil

  • Sub-steps:
    1. Using a multimeter, test the primary and secondary resistance of the ignition coil.
    2. If the resistance is out of specification, replace the ignition coil for cylinder 1.
    3. Reconnect the ignition coil and ensure it is secured properly.

4. Compression Test

  • Sub-steps:
    1. Remove the spark plug from cylinder 1 to allow access for the compression tester.
    2. Insert the compression tester into the spark plug hole and crank the engine.
    3. Record the compression reading; it should meet manufacturer specifications (typically around 180 psi).
    4. If compression is low, further investigation is needed for potential head gasket failure or valve issues.

5. Clean or Replace Fuel Injector

  • Sub-steps:
    1. Disconnect the fuel injector connector and remove the fuel rail assembly if necessary.
    2. Inspect the injector for clogs; clean it using a fuel injector cleaner or replace it if faulty.
    3. Reinstall the injector and reconnect any necessary components.

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
  • Socket set
  • Torque wrench
  • Compression tester
  • Multimeter
  • Fuel injector cleaner

Parts Required

  • Spark plug
  • Ignition coil (if faulty)
  • Fuel injector (if clogged or faulty)

Additional Information

Error CodeP0301
Component

Engine

Repair Time

2-4 hours

Difficulty

medium

Severity

high

Tools

6 items

Parts

3 items

Related Faults

Discover similar issues

  1. how to fix P0021 code in Toyota Corolla E140 (2006-2013)

    P0021

    Learn how to diagnose and fix P0021 VVT malfunction in Toyota Corolla E140 (2006-2013). Step-by-step guide with diagnostic procedures and repair instr...

    Component:Engine
    Symptoms
    • •Check engine light illuminated
    • •Engine performance issues (rough idle or hesitation)
    • +{count} more
  2. how to troubleshoot traction control issues in Toyota Corolla E140 (2006-2013)

    Learn how to troubleshoot traction control issues in Toyota Corolla E140 (2006-2013). Step-by-step guide with diagnostic steps and repair instructions...

    Component:Electrical
    Symptoms
    • •Traction control warning light illuminated on the dashboard
    • •Reduced engine power during acceleration
    • +{count} more
  3. how to fix a slipping transmission in my Toyota Corolla E140 (2006-2013)

    Learn how to diagnose and fix a slipping transmission in your 2006-2013 Toyota Corolla E140. Step-by-step guide with symptoms, diagnostic steps, and r...

    Component:Transmission
    Symptoms
    • •Check engine light illuminated
    • •Engine revs without an increase in speed
    • +{count} more
  4. how to reset the maintenance light on my Toyota Corolla E140 (2006-2013)

    Learn how to reset the maintenance light on your Toyota Corolla E140 (2006-2013) with this simple step-by-step guide. Quick and easy instructions.

    Component:Electrical
    Symptoms
    • •Maintenance light illuminated on the dashboard
    • •Reminder for oil change or service indicated
    • +{count} more
  5. how to diagnose P0420 code Toyota Corolla E140 (2006-2013) issues?

    P0420

    Learn how to diagnose and fix P0420 catalytic converter efficiency issues in Toyota Corolla E140 (2006-2013). Step-by-step guide with diagnostic proce...

    Component:Exhaust System
    Symptoms
    • •Check engine light illuminated
    • •Decreased fuel efficiency
    • +{count} more
  6. how to troubleshoot my Toyota Corolla E140 (2006-2013) power windows not working

    Learn how to troubleshoot and fix power windows not working in Toyota Corolla E140 (2006-2013). Step-by-step guide with diagnostic procedures and repa...

    Component:Electrical
    Symptoms
    • •All power windows are unresponsive
    • •Window switches do not light up when activated
    • +{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