how to fix P0302 code for Toyota Camry XV40 (2007-2011)

Toyota Camry XV80 (2025-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

Error Code: P0302

4 min read

604 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 Toyota Camry XV40. 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.
•Allow the engine to cool before performing any work to prevent burns.

Symptoms

•Check engine light illuminated
•Rough idle or hesitation during acceleration
•Poor fuel economy
•Engine stalling or misfiring
•Increased exhaust emissions

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to confirm P0302 and check for any related codes.
2
Inspect the spark plug and ignition coil for cylinder 2 for signs of wear or damage.
3
Perform a visual inspection of the wiring and connectors to the ignition coil and fuel injector of cylinder 2.
4
Check the fuel injector operation by using a noid light or multimeter to ensure it is receiving the proper signal.
5
Test the compression of cylinder 2 to ensure there are no mechanical issues.
6
Inspect for vacuum leaks around the intake manifold or associated components.

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
•Ratchet and extension
•Spark plug socket
•Injector puller (if necessary)

Parts Required

•Spark plug (for cylinder 2)
•Ignition coil (for cylinder 2)
•Fuel injector (for cylinder 2) (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 the spark plug and ignition coil for cylinder 2 for signs of wear or damage.
3
Perform a visual inspection of the wiring and connectors to the ignition coil and fuel injector of cylinder 2.
4
Check the fuel injector operation by using a noid light or multimeter to ensure it is receiving the proper signal.
5
Test the compression of cylinder 2 to ensure there are no mechanical issues.
6
Inspect for vacuum leaks around the intake manifold or associated components.

Solution

1. Preparation

Gather required tools and parts.
Disconnect the battery to prevent electrical shorts.
Allow the engine to cool if it has been running recently.

2. Inspect and Replace Spark Plug

Remove the engine cover (if applicable) to access the spark plug.
Using a socket wrench, remove the spark plug from cylinder 2.
- Tools Required: Spark plug socket, ratchet, extension.
Inspect the spark plug for wear, fouling, or damage.
If necessary, replace the spark plug with a new one that meets OEM specifications.
Torque the new spark plug to the manufacturer's specification (generally around 13-15 lb-ft).

3. Inspect and Replace Ignition Coil

Disconnect the electrical connector from the ignition coil for cylinder 2.
Remove the bolts securing the ignition coil and pull it out from the cylinder head.
- Tools Required: Socket set.
Inspect the ignition coil for cracks or signs of failure.
If faulty, replace the ignition coil with a new one that meets OEM specifications.
Reinstall the ignition coil, ensuring it is seated properly and secure it with bolts.

4. Inspect and Test Fuel Injector

Disconnect the electrical connector from the fuel injector for cylinder 2.
Remove the fuel injector using an injector puller if necessary.
Inspect the injector for clogs or debris.
If needed, replace the fuel injector with a new one that meets OEM specifications.
Reinstall the injector, ensuring it is seated correctly in the intake manifold.

5. Clear Codes and Reconnect Battery

Reconnect the battery and clear any trouble codes using an OBD-II scanner.
Ensure all components are properly reinstalled.