P0302 1999 Ford F150 Code - Cylinder 2 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 #2, Clogged or faulty Fuel Injector #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 1999 Ford F150 indicates Cylinder 2 Misfire Detected.
- Common causes
- Common causes include Faulty Spark Plug #2, Clogged or faulty Fuel Injector #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 1999 Ford F150 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 2.
What are the Possible Causes of the DTC P0302 1999 Ford F150?
- Faulty Spark Plug #2
- Clogged or faulty Fuel Injector #2
- Faulty Ignition Coil #2
- Fuel Injector #2 harness is open or shorted
- Fuel Injector #2 circuit poor electrical connection
- Ignition Coil #2 harness is open or shorted
- Ignition Coil #2 circuit poor electrical connection
- Insufficient cylinder 2 compression
- Incorrect fuel pressure
- Intake air leak
- EVAP canister purge valve
- Evaporative emission system
How to Fix the DTC P0302 1999 Ford F150?
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 P0302 1999 Ford F150 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 1999 Ford F150 Code
1. What does the OBDII code P0302 mean on a 1999 Ford F150?
P0302 indicates that the engine control module (ECM) has detected a misfire in cylinder 2 of the engine.
2. What are the common symptoms of code P0302 in a 1999 Ford F150?
Symptoms include rough idling, reduced engine performance, poor fuel efficiency, hesitation during acceleration, and the check engine light turning on.
3. What causes a cylinder 2 misfire in a 1999 Ford F150?
Common causes include a faulty spark plug, a bad ignition coil, a clogged fuel injector, a vacuum leak, low cylinder compression, or issues with the fuel system.
4. Can I drive my 1999 Ford F150 with a P0302 code?
Driving with a P0302 code is not recommended, as it can lead to further engine damage, poor performance, and potential catalytic converter failure.
5. How do I diagnose a P0302 code on a 1999 Ford F150?
Start by inspecting the spark plug, ignition coil, and fuel injector for cylinder 2. You may also perform a compression test and check for vacuum leaks or fuel delivery issues.
6. How much does it cost to fix a P0302 code on a 1999 Ford F150?
Repair costs vary depending on the cause. Replacing a spark plug or ignition coil may cost $50–$150, while addressing more complex issues like low compression could be significantly more expensive.
7. What tools are needed to fix a P0302 code on a 1999 Ford F150?
Basic tools include a spark plug socket, a multimeter, a fuel pressure gauge, and possibly an OBDII scanner to clear the code after repairs.
8. Can a dirty air filter cause a P0302 code on a 1999 Ford F150?
While unlikely to directly cause a cylinder-specific misfire, a severely dirty air filter can contribute to poor engine performance and should be checked as part of regular maintenance.
9. Do I need to replace all the spark plugs if cylinder 2 misfires in my 1999 Ford F150?
It’s a good idea to replace all spark plugs if they’re old or worn, as this ensures consistent performance across all cylinders.
10. Will clearing the P0302 code fix the issue in my 1999 Ford F150?
Clearing the code without addressing the root cause will not resolve the problem, and the code is likely to return. Proper diagnosis and repair are necessary.
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