AutoCodes – Honda – P0302 2018 Honda CR-V

P0302 2018 Honda CR-V Code - No. 2 Cylinder Misfire Detected

Quick Answer

The crankshaft vibrates slightly when each cylinder fires. Common causes include Valve adjustment, Faulty spark plug #2, Faulty ignition coil #2. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0302 2018 Honda CR-V indicates No. 2 Cylinder Misfire Detected.
Common causes: Common causes include Valve adjustment, Faulty spark plug #2, Faulty ignition coil #2.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 321

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 16, 2023

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0302 2018 Honda CR-V Description

The crankshaft vibrates slightly when each cylinder fires. If a misfire occurs, the crankshaft rotation speed changes rapidly. The Powertrain Control Module (PCM) monitors the crankshaft rotation speed based on the output pulses from the Crankshaft Position (CKP) Sensor. By monitoring changes in the crankshaft rotation speed, the PCM counts the number of misfires and determines which cylinder is misfiring. If a misfire is detected, a Diagnostic Trouble Code (DTC) is stored.
There are two types of misfire detection: Type 1: When the number of misfires per 200 engine revolutions reaches the level that can damage the three-way catalyst (TWC), a DTC is stored and the MIL blinks. Type 2: When the number of misfires per 1,000 engine revolutions reaches the level that affects exhaust emissions but is not severe enough to immediately damage the catalyst, a DTC is stored, and the MIL comes on.

OBDII Code P0302 2018 Honda CR-V - No. 2 Cylinder Misfire Detected - AutoCodes.com — P0302 2018 Honda CR-V Code - No. 2 Cylinder Misfire Detected

What does this mean?

What are the Possible Causes of the DTC P0302 2018 Honda CR-V?

Valve adjustment
Faulty spark plug #2
Faulty ignition coil #2
Clogged or faulty fuel injector #2
Intake air leak
Insufficient cylinder #2 compression
Incorrect fuel pressure

How to Fix the DTC P0302 2018 Honda CR-V?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

The P0302 code means that cylinder #2 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder #2. If the problem persists more tests need to be done to diagnose the problem, see "Possible Causes".

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0302 2018 Honda CR-V code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0302 2018 Honda CR-V code?

Need more information on how to fix the P0302 2018 Honda CR-V code? Get Access to Factory Service Manuals

Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0302 2018 Honda CR-V Code

1. What does OBDII code P0302 mean for a 2018 Honda CR-V?

Code P0302 indicates that a misfire has been detected in cylinder No. 2, which means the engine is not firing properly in that specific cylinder.

2. What are the common symptoms of a P0302 code in a 2018 Honda CR-V?

Symptoms may include a rough idle, engine hesitation, reduced fuel efficiency, loss of power, and the check engine light turning on.

3. What can cause a P0302 code in a 2018 Honda CR-V?

Common causes include a faulty spark plug, ignition coil, fuel injector issues, vacuum leaks, low compression in the cylinder, or a damaged intake gasket.

4. Can I drive my 2018 Honda CR-V with a P0302 code?

While it may be possible to drive, itâ€™s not recommended as it can lead to further engine damage, including damage to the catalytic converter if the issue is not resolved.

5. How do I fix the P0302 code on my 2018 Honda CR-V?

Start by checking and replacing the spark plug and ignition coil for cylinder No. 2. If the issue persists, inspect the fuel injector, perform a compression test, and check for vacuum leaks.

6. How much does it cost to repair a P0302 code on a 2018 Honda CR-V?

The cost depends on the root cause. Spark plug replacement can cost $100-$200, while ignition coil or fuel injector repairs may range from $200-$500 or more.

7. How can I prevent a P0302 code from occurring on my 2018 Honda CR-V?

Regular maintenance, including timely spark plug replacement, proper fuel quality, and ensuring all ignition components are in good condition, can help prevent this issue.

8. Can a dirty air filter cause a P0302 code in a 2018 Honda CR-V?

While rare, a severely clogged air filter can restrict airflow to the engine, potentially contributing to misfires, including P0302.

9. Will a P0302 code cause long-term damage to my 2018 Honda CR-V?

If unresolved, a persistent misfire can damage the catalytic converter, lead to excessive engine wear, and reduce overall engine performance.

10. Do I need special tools to diagnose a P0302 code on a 2018 Honda CR-V?

Basic tools like an OBDII scanner, spark plug socket, and multimeter can help with diagnosis. For advanced troubleshooting, a compression tester or fuel pressure gauge may be needed.