P0302 Acura 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 Acura 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.
Code P0302 Acura Description
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.
What are the Possible Causes of the DTC P0302 Acura?
- 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 Acura?
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.
Code Tech Notes
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What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0302 Acura 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.
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Frequently Asked Questions about P0302 Acura Code
What does the OBDII code P0302 mean on an Acura?
P0302 indicates that the engine control module (ECM) has detected a misfire in cylinder number 2, which can affect performance and emissions.
What are the symptoms of a P0302 code in an Acura?
Symptoms may include rough idling, reduced engine performance, poor fuel economy, a noticeable loss of power, and the check engine light illuminating.
What are the common causes of a P0302 code?
The most common causes include a faulty spark plug, a bad ignition coil, a clogged fuel injector, low compression in the cylinder, or vacuum leaks near cylinder 2.
How can I diagnose the P0302 code on my Acura?
Start by inspecting the spark plug and ignition coil for cylinder 2. Check the fuel injector for clogs, test for proper fuel pressure, and perform a compression test on the cylinder.
Can a P0302 code damage my Acura’s engine if left unresolved?
Yes, prolonged driving with a misfire can cause damage to the catalytic converter, increase emissions, and lead to further engine issues.
How do I fix the P0302 code on my Acura?
Repairs may involve replacing the spark plug or ignition coil for cylinder 2, cleaning or replacing the fuel injector, fixing vacuum leaks, or addressing low cylinder compression.
Can bad fuel cause a P0302 code in an Acura?
Yes, contaminated or poor-quality fuel can lead to misfires, including those detected in cylinder 2, so using clean, high-quality fuel is important.
Is it safe to drive my Acura with a P0302 code?
Driving with a P0302 code is not recommended, as it can lead to further damage and reduced performance. Address the issue as soon as possible.
How much does it cost to fix a P0302 code on an Acura?
Repair costs vary, but replacing a spark plug or ignition coil might cost $100-$300, while more complex repairs, like fixing compression issues, can be significantly more expensive.
Can a dirty air filter cause a P0302 code on an Acura?
While less common, a severely clogged air filter can restrict airflow, potentially contributing to misfires. Replacing a dirty air filter is a simple maintenance step to consider.
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