P0303 Suzuki Code - Cylinder 3 Misfire Detected
Quick Answer
The Engine Control Module (ECM) uses information from the crankshaft position sensor and the camshaft position sensor to determine when an engine cylinder misfire is occurring. Common causes include Faulty Spark Plug #3, Clogged or faulty Fuel Injector #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 Suzuki indicates Cylinder 3 Misfire Detected.
- Common causes
- Common causes include Faulty Spark Plug #3, Clogged or faulty Fuel Injector #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 Suzuki Description
Extreme cylinder misfire events can cause catalytic converter damage. The malfunction indicator lamp (MIL) will flash when the conditions for catalytic converter damage are present. The Diagnostic Trouble Codes (DTC) P0303 correspond to cylinders 3. When the ECM detects that one or more specific cylinders are misfiring, the DTC for the respective misfiring cylinder will set, and up to 2 of the corresponding fuel injectors are disabled for a minimum of 30 s. The ECM will then re-enable the fuel injector and, after approximately 200 engine revolutions, will determine if the misfire is still present. If the misfire is still present, the ECM will disable the fuel injector again repeating the process. If the misfire is not present, the fuel injector will remain enabled by the ECM. In Spark Ignition Direct Injection (SIDI) system applications, if a fuel injector fault DTC is set during a misfire event, the ECM will not re-enable the injector.
What are the Possible Causes of the DTC P0303 Suzuki?
- Faulty Spark Plug #3
- Clogged or faulty Fuel Injector #3
- Faulty Ignition Coil #3
- Fuel Injector #3 harness is open or shorted
- Fuel Injector #3 circuit poor electrical connection
- Ignition Coil #3 harness is open or shorted
- Ignition Coil #3 circuit poor electrical connection
- Insufficient cylinder 3 compression
- Incorrect fuel pressure
- Intake air leak
How to Fix the DTC P0303 Suzuki?
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
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0303 Suzuki 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 Suzuki code?
Need more information on how to fix the P0303 Suzuki code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0303 Suzuki code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0303 Suzuki Code
Q: What does the OBDII code P0303 mean on a Suzuki?
A: The P0303 code indicates a misfire has been detected in cylinder 3 of the engine.
Q: What are common symptoms of the P0303 code on a Suzuki?
A: Symptoms include rough idling, reduced engine performance, poor fuel economy, and sometimes the Check Engine Light flashing.
Q: What causes the P0303 code on a Suzuki?
A: Common causes include a faulty spark plug, a failing ignition coil, low compression in cylinder 3, a clogged fuel injector, or a vacuum leak.
Q: Can I drive my Suzuki with a P0303 code?
A: Driving with a P0303 code is not recommended, as it can cause further engine damage, including damage to the catalytic converter.
Q: How do I diagnose a P0303 code on a Suzuki?
A: Diagnosing involves checking the spark plug, ignition coil, and fuel injector for cylinder 3, as well as inspecting for vacuum leaks or low compression.
Q: How do I fix the P0303 code on a Suzuki?
A: Repairs may involve replacing the spark plug or ignition coil for cylinder 3, cleaning or replacing the fuel injector, or repairing a vacuum leak.
Q: Can a dirty air filter cause a P0303 code on a Suzuki?
A: While unlikely, a severely clogged air filter can contribute to poor engine performance, which might exacerbate misfire issues.
Q: Will replacing the spark plug fix the P0303 code on a Suzuki?
A: Replacing the spark plug might fix the issue if the misfire is caused by a worn or damaged plug in cylinder 3.
Q: How much does it cost to fix a P0303 code on a Suzuki?
A: Repair costs can vary but typically range from $50 to $300 depending on whether a spark plug, ignition coil, or fuel injector needs replacement.
Q: Can low fuel pressure trigger a P0303 code on a Suzuki?
A: Yes, low fuel pressure can lead to misfires, including in cylinder 3, as it affects fuel delivery to the engine.
Discuss the causes and fixes for P0303 Suzuki OBDII Code
Code P0303 Suzuki comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
