AutoCodes – Toyota – P0302 2014 Toyota RAV4

P0302 2014 Toyota RAV4 Code - Cylinder 2 Misfire Detected

Quick Answer

When the engine misfires, high concentrations of Hydrocarbons (HC) enter the exhaust gas. Common causes include Intake air leak, 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 2014 Toyota RAV4 indicates Cylinder 2 Misfire Detected.
Common causes: Common causes include Intake air leak, 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 616

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 25, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0302 2014 Toyota RAV4 Description

When the engine misfires, high concentrations of Hydrocarbons (HC) enter the exhaust gas. Extremely high hydrocarbon concentration levels can cause an increase in exhaust emission levels. Extremely high concentrations of hydrocarbons can also cause increases in the three-way catalytic converter temperature, which may cause damage to the three-way catalytic converter. To prevent this increase in emissions and to limit the possibility of thermal damage, the Engine Control Module (ECM) monitors the misfire count. When the temperature of the three-way catalytic converter reaches the point of thermal degradation, the ECM blinks the MIL. To monitor misfires, the ECM uses both the camshaft position sensor and the crankshaft position sensor. The camshaft position sensor is used to identify any misfiring cylinders and the crankshaft position sensor is used to measure variations in the crankshaft rotation speed. Misfires are counted when the crankshaft rotation speed variations exceed predetermined thresholds. If the misfire count exceeds the threshold levels and could cause emission control system performance deterioration, the ECM illuminates the MIL and stores a Diagnostic Trouble Code (DTC).

OBDII Code P0302 2014 Toyota RAV4 - Cylinder 2 Misfire Detected - AutoCodes.com — P0302 2014 Toyota RAV4 Code - Cylinder 2 Misfire Detected

What does this mean?

What are the Possible Causes of the DTC P0302 2014 Toyota RAV4?

Intake air leak
Faulty spark plug #2
Faulty ignition coil #2
Clogged or faulty fuel injector #2
Fuel injectors #2 harness is open or shorted
Fuel Injectors #2 circuit poor electrical connection
Ignition coils #2 harness is open or shorted
Ignition coils #2 circuit poor electrical connection
Incorrect Fuel pressure
Faulty Mass Air Flow (MAF) Sensor
Faulty Engine Control Module (ECM)
Faulty Engine Coolant Temperature (ECT) Sensor

How to Fix the DTC P0302 2014 Toyota RAV4?

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" for the most common problems.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0302 2014 Toyota RAV4 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 2014 Toyota RAV4 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 2014 Toyota RAV4 Code

1. What does the OBDII code P0302 mean on a 2014 Toyota RAV4?

P0302 indicates that the engine's control module has detected a misfire in cylinder 2 of your 2014 Toyota RAV4.

2. What are the common symptoms of a P0302 code in a 2014 Toyota RAV4?

Symptoms may include rough idling, reduced engine performance, poor fuel economy, hesitation during acceleration, or the Check Engine Light turning on.

3. What causes a P0302 code in a 2014 Toyota RAV4?

Common causes include a faulty spark plug, a bad ignition coil, a clogged fuel injector, low engine compression, or vacuum leaks near cylinder 2.

4. Can a dirty fuel injector cause a P0302 code in my RAV4?

Yes, a clogged or dirty fuel injector in cylinder 2 can disrupt the air-fuel mixture, leading to a misfire and triggering the P0302 code.

5. Is it safe to drive my 2014 Toyota RAV4 with a P0302 code?

Driving with a P0302 code is not recommended, as it can cause further engine damage, reduced power, and higher emissions. Address the issue as soon as possible.

6. How do I diagnose a P0302 code on a 2014 Toyota RAV4?

Start by inspecting the spark plug, ignition coil, and fuel injector for cylinder 2. Check for vacuum leaks, low compression, or issues with fuel delivery.

7. How much does it cost to fix a P0302 code on a 2014 Toyota RAV4?

Repair costs can vary. Replacing a spark plug or ignition coil may cost $100-$300, while more extensive repairs like fixing low compression could cost significantly more.

8. Can a bad ignition coil cause a P0302 code in my RAV4?

Yes, a failing ignition coil can cause cylinder 2 to misfire, leading to the P0302 code.

9. Will replacing the spark plug in cylinder 2 clear the P0302 code?

If the spark plug is the cause of the misfire, replacing it should resolve the issue and clear the code. However, you may need to reset the code with an OBDII scanner.

10. How do I prevent a P0302 code from occurring again in my 2014 Toyota RAV4?

Perform regular maintenance, including timely replacement of spark plugs, ignition coils, and fuel system cleaning, to reduce the likelihood of misfires.