P0358 1999 Ford F150 Code - Ignition Coil 'H' Primary/Secondary Circuit Malfunction
Quick Answer
The ignition system on the vehicle uses individual ignition coils for each cylinder. Common causes include Faulty Ignition Coil 8, Ignition Coil 8 harness is open or shorted, Ignition Coil 8 circuit poor electrical connection. 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
- P0358 1999 Ford F150 indicates Ignition Coil 'H' Primary/Secondary Circuit Malfunction.
- Common causes
- Common causes include Faulty Ignition Coil 8, Ignition Coil 8 harness is open or shorted, Ignition Coil 8 circuit poor electrical connection.
- 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 P0358 1999 Ford F150 Description
What are the Possible Causes of the DTC P0358 1999 Ford F150?
- Faulty Ignition Coil 8
- Ignition Coil 8 harness is open or shorted
- Ignition Coil 8 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0358 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0358 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 P0358 1999 Ford F150 Code
1. What does the OBDII code P0358 mean on a 1999 Ford F150?
P0358 indicates a malfunction in the ignition coil "H" primary or secondary circuit, which refers to an issue with the eighth ignition coil or its associated wiring.
2. What are the symptoms of code P0358 in a 1999 Ford F150?
Common symptoms include engine misfires, rough idling, reduced power, hesitation during acceleration, and the check engine light turning on.
3. What causes the P0358 code in a 1999 Ford F150?
Possible causes include a faulty ignition coil, damaged spark plug, broken or corroded wiring, a bad coil connector, or a malfunctioning PCM (Powertrain Control Module).
4. How do I diagnose the P0358 code on my 1999 Ford F150?
Start by visually inspecting the ignition coil, wiring, and connectors for damage or corrosion. Use a multimeter to test the coil and check for continuity in the wiring. If necessary, swap the coil with another cylinder to see if the misfire moves.
5. Can I drive my 1999 Ford F150 with code P0358?
Driving with this code is not recommended, as it can cause further engine damage, reduced fuel efficiency, and performance issues due to misfiring.
6. How do I fix the P0358 code on a 1999 Ford F150?
Repairs may include replacing the faulty ignition coil, repairing or replacing damaged wiring or connectors, or replacing the spark plug associated with cylinder 8.
7. How much does it cost to fix the P0358 code on a 1999 Ford F150?
The cost depends on the repair needed. Replacing an ignition coil typically costs $50–$150 for the part, plus labor, while wiring or PCM repairs can vary widely.
8. Can a bad spark plug cause the P0358 code on a 1999 Ford F150?
Yes, a worn or damaged spark plug can overwork the ignition coil, leading to a malfunction and triggering the P0358 code.
9. What tools are needed to troubleshoot the P0358 code on a 1999 Ford F150?
You’ll need a scan tool to read and clear the code, a multimeter to test the ignition coil and wiring, and basic hand tools to remove and replace components.
10. Will a bad PCM cause the P0358 code on a 1999 Ford F150?
While rare, a faulty PCM can cause this code if it fails to properly control the ignition coil. This should be checked after ruling out other causes.
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