P0303 Honda Code - No. 3 Cylinder Misfire Detected
Quick Answer
The crankshaft vibrates slightly when each cylinder fires. Common causes include Valve adjustment, Faulty spark plug #3, Faulty ignition coil #3. 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
- P0303 Honda indicates No. 3 Cylinder Misfire Detected.
- Common causes
- Common causes include Valve adjustment, Faulty spark plug #3, Faulty ignition coil #3.
- 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 P0303 Honda 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 P0303 Honda?
- Valve adjustment
- Faulty spark plug #3
- Faulty ignition coil #3
- Clogged or faulty fuel injector #3
- Intake air leak
- Insufficient cylinder #3 compression
- Incorrect fuel pressure
How to Fix the DTC P0303 Honda?
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 P0303 Honda 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 P0303 Honda code?
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Information for Specific Honda Models
- P0303 2008 Honda Accord — Cylinder 3 Misfire Detected
- P0303 2009 Honda Accord — Cylinder 3 Misfire Detected
- P0303 2010 Honda Accord — Cylinder 3 Misfire Detected
- P0303 1996 Honda Civic — Cylinder 3 Misfire Detected
- P0303 1997 Honda Civic — Cylinder 3 Misfire Detected
- P0303 1998 Honda Civic — Cylinder 3 Misfire Detected
- P0303 1999 Honda Civic — Cylinder 3 Misfire Detected
- P0303 2000 Honda Civic — Cylinder 3 Misfire Detected
- P0303 2016 Honda CR-V — No. 3 Cylinder Misfire Detected
- P0303 2017 Honda CR-V — No. 3 Cylinder Misfire Detected
- P0303 2018 Honda CR-V — No. 3 Cylinder Misfire Detected
- P0303 2019 Honda CR-V — No. 3 Cylinder Misfire Detected
- P0303 2020 Honda CR-V — No. 3 Cylinder Misfire Detected
- P0303 2021 Honda CR-V — No. 3 Cylinder Misfire Detected
Frequently Asked Questions about P0303 Honda Code
No Frequently Asked Questions about P0303 Honda Code found.
Discuss the causes and fixes for P0303 Honda OBDII Code
-
I have a 2002 Honda Accord that has a misfire on cylinder three I've replaced the plug wires the spark plugs the distributor cap and rotor button and the engine is still running rough and I still have a code saying it's a misfire on cylinder three
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You next step is to perform a cylinder head valve adjustment. Usually the valve adjustment takes care of the problem.
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