how to fix P0302 code in Toyota Camry Eighth Generation (2018-present)

Toyota Camry Eighth Generation (2018-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

Error Code: P0302

3 min read

575 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. 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 maintenance.

Symptoms

•Check engine light illuminated
•Rough idle
•Decreased fuel efficiency
•Engine stalling
•Loss of power during acceleration

Diagnostic Steps

1
Scan the vehicle's OBD-II system for error codes to confirm the presence of P0302.
2
Inspect the ignition coil and spark plug for cylinder 2 for signs of wear or damage.
3
Check the fuel injector for cylinder 2 to ensure it’s functioning properly.
4
Perform a compression test on cylinder 2 to assess the mechanical health of the engine.
5
Examine the engine for vacuum leaks that may affect cylinder performance.
6
Review the data from the engine control module (ECM) for any other related codes or symptoms.

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
•Multimeter
•Torque wrench
•Compression tester
•Spark plug socket

Parts Required

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

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Diagnostic Steps

1
Scan the vehicle's OBD-II system for error codes to confirm the presence of P0302.
2
Inspect the ignition coil and spark plug for cylinder 2 for signs of wear or damage.
3
Check the fuel injector for cylinder 2 to ensure it’s functioning properly.
4
Perform a compression test on cylinder 2 to assess the mechanical health of the engine.
5
Examine the engine for vacuum leaks that may affect cylinder performance.
6
Review the data from the engine control module (ECM) for any other related codes or symptoms.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the negative battery terminal to prevent electrical shorts.
Allow the engine to cool down before proceeding.

2. Inspect and Replace Spark Plug

Remove the engine cover if applicable using a socket set.
Disconnect the ignition coil connector for cylinder 2.
Remove the ignition coil from cylinder 2 using a socket.
Extract the spark plug from cylinder 2 with a spark plug socket.
Inspect the spark plug for wear; replace if necessary with a new spark plug that meets OEM specifications.
Reinstall the new spark plug and torque to the manufacturer’s specifications (typically around 13-15 lb-ft).

3. Inspect and Replace Ignition Coil

If the spark plug is fine, test the ignition coil for cylinder 2 using a multimeter.
If faulty, replace the ignition coil with a new one that meets OEM specifications.
Reinstall the ignition coil and reconnect the electrical connector.

4. Check and Replace Fuel Injector

Disconnect the fuel injector connector for cylinder 2.
Remove the fuel rail (if necessary) to access the injector.
Inspect the fuel injector for clogs or damage; replace if necessary with an OEM replacement.
Reassemble the fuel rail and reconnect the injector.

5. Compression Test

If misfire persists, perform a compression test.
Remove spark plugs and install compression tester in cylinder 2.
Crank the engine and record the compression reading.
If compression is low, further engine diagnostics may be necessary (valve issues, head gasket failure).