P0303 Lincoln Code - Cylinder 3 Misfire Detected
Quick Answer
Misfire is defined as a lack of combustion in a cylinder due to the absence of a spark, incorrect fuel metering, low compression, or any other cause. 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 Lincoln 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 Lincoln Description
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Crankshaft Position (CKP) sensor signal to vary, the Engine Control Module (ECM) can determine that a misfire is occurring.
The Malfunction Indicator Lamp (MIL) blinks once per second when detecting a misfire severe enough to cause catalyst damage. If the MIL is in a steady state due to a misfire, this indicates the threshold for emissions was exceeded and caused the vehicle to fail an inspection and maintenance tailpipe test.
This Diagnostic Trouble Code (DTC) sets when the misfire detection monitor detects an engine misfire in cylinder 3.
What are the Possible Causes of the DTC P0303 Lincoln?
- 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 Lincoln?
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 Lincoln 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 P0303 Lincoln Code
1. What are common symptoms of OBDII code P0303 (Cylinder 3 Misfire Detected) in a Lincoln?
- Common symptoms include engine shaking or vibrating, loss of power, rough idle, and potential increase in fuel consumption.
2. What are the possible causes of OBDII code P0303 in a Lincoln?
- The code P0303 in a Lincoln could be caused by issues such as faulty spark plugs, ignition coil failure, vacuum leaks, fuel injector problems, or low compression in cylinder 3.
3. How can I diagnose the cause of OBDII code P0303 in my Lincoln?
- To diagnose the cause of code P0303, you can perform a visual inspection of spark plugs and ignition coils, conduct a compression test, check for vacuum leaks, and use a scan tool to monitor live data while the engine is running.
4. Can driving with OBDII code P0303 in a Lincoln cause further damage?
- Continuing to drive with code P0303 may lead to damage to the catalytic converter, oxygen sensors, or other engine components over time, so it's best to address the issue promptly.
5. How can I repair OBDII code P0303 (Cylinder 3 Misfire Detected) in my Lincoln?
- Repair options include replacing spark plugs, ignition coils, fuel injectors, addressing vacuum leaks, correcting compression issues, and performing a thorough engine tune-up.
6. Is it safe to drive my Lincoln with a misfire detected in cylinder 3?
- It is generally not recommended to drive a vehicle with a misfire, as this can lead to further damage and potential safety hazards. It's best to address the issue as soon as possible.
7. Can bad gasoline cause OBDII code P0303 in a Lincoln?
- Poor quality or contaminated gasoline can potentially contribute to a misfire issue, but it is often not the sole cause. It's advisable to rule out other common causes before attributing the problem to bad gasoline.
8. How do I reset OBDII code P0303 in a Lincoln after making repairs?
- After addressing the underlying issue causing code P0303, you can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to clear the fault code.
9. Will OBDII code P0303 cause my Lincoln's check engine light to illuminate?
- Yes, code P0303 typically triggers the check engine light to illuminate in your Lincoln's dashboard to alert you to a detected misfire in cylinder 3.
10. How can regular maintenance help prevent OBDII code P0303 in my Lincoln?
- Regular maintenance such as timely replacement of spark plugs, ignition components, and performing routine inspections can help prevent issues like code P0303 by ensuring optimal engine performance.
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