how to fix P0302 code on Honda CR-V Sixth Generation (2023-present)

Honda CR-V Fifth Generation (2017-2022)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

Error Code: P0302

4 min read

643 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 Honda CR-V. Step-by-step guide with diagnostic procedures and repair instructions.

Error Code

P0302

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.

Symptoms

•Check engine light illuminated
•Rough idle
•Decreased engine performance
•Poor fuel economy
•Engine vibrations or shaking

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to confirm P0302 and check for any related codes.
2
Inspect ignition components (spark plug, ignition coil) specific to cylinder 2 for wear or damage.
3
Check fuel injector operation on cylinder 2 using a fuel injector tester.
4
Monitor engine compression in cylinder 2 using a compression gauge to assess engine health.
5
Inspect vacuum lines and intake manifold for leaks that may affect cylinder performance.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

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
•Spark plug socket
•Fuel injector tester
•Compression gauge

Parts Required

•Spark plug (OEM specification)
•Ignition coil (if necessary)
•Fuel injector (if necessary)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to confirm P0302 and check for any related codes.
2
Inspect ignition components (spark plug, ignition coil) specific to cylinder 2 for wear or damage.
3
Check fuel injector operation on cylinder 2 using a fuel injector tester.
4
Monitor engine compression in cylinder 2 using a compression gauge to assess engine health.
5
Inspect vacuum lines and intake manifold for leaks that may affect cylinder performance.

Solution

1. Preparation

Gather all necessary tools and parts.
Disconnect the negative battery cable to prevent electrical shorts.

2. Inspect and Replace Ignition Components

Remove Engine Cover (if applicable)
- Use a socket set to remove bolts securing the cover.
Access Spark Plug and Ignition Coil
- Locate cylinder 2 (usually the second cylinder from the front of the vehicle).
- Remove the ignition coil by unscrewing the retaining bolts and disconnecting the electrical connector.
Inspect and Replace Spark Plug
- Remove the spark plug using a spark plug socket. Check for signs of wear or damage (e.g., carbon buildup, electrode wear).
- If worn, replace it with a new spark plug that meets OEM specifications (typically NGK or Denso).
- Torque the new spark plug to the manufacturer’s specification (usually around 13 lb-ft).
Replace Ignition Coil
- If the ignition coil shows signs of damage, replace it with an OEM or equivalent part.
- Reinstall the ignition coil and connect the electrical connector securely.

3. Check and Test Fuel Injector

Remove Fuel Injector
- Disconnect fuel lines with proper fuel line removal tools, ensuring to release any fuel pressure beforehand.
- Remove the fuel injector retaining clips and carefully pull out the injector.
Test Injector Functionality
- Use a fuel injector tester to check for proper spray pattern and functionality.
- Replace the injector if it fails the test. Ensure to use a compatible injector for the CR-V.

4. Perform Compression Test

Remove Spark Plug
- Remove the spark plug from cylinder 2 again if not already done.
Connect Compression Gauge
- Insert the compression gauge into the spark plug hole.
Crank Engine
- Crank the engine for a few seconds and record the compression reading.
- Compare the reading to manufacturer specifications (typically 180-200 psi). If low, further engine diagnostics may be required.

5. Reassemble and Check

Reinstall all components removed during the repair.
Reconnect the negative battery cable.
Start the engine and allow it to reach operating temperature.