P0357 1999 Ford F150 Code - Ignition Coil 'G' 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 7, Ignition Coil 7 harness is open or shorted, Ignition Coil 7 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
- P0357 1999 Ford F150 indicates Ignition Coil 'G' Primary/Secondary Circuit Malfunction.
- Common causes
- Common causes include Faulty Ignition Coil 7, Ignition Coil 7 harness is open or shorted, Ignition Coil 7 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 P0357 1999 Ford F150 Description
What are the Possible Causes of the DTC P0357 1999 Ford F150?
- Faulty Ignition Coil 7
- Ignition Coil 7 harness is open or shorted
- Ignition Coil 7 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0357 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 P0357 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 P0357 1999 Ford F150 Code
1. What does the OBDII code P0357 mean on a 1999 Ford F150?
P0357 indicates an issue in the ignition coil "G" primary or secondary circuit, which corresponds to cylinder 7 in the firing order.
2. What are common symptoms of the P0357 code in a 1999 Ford F150?
Symptoms typically include misfires, rough idling, reduced engine power, poor fuel economy, and possibly an illuminated Check Engine Light.
3. What causes the P0357 code on a 1999 Ford F150?
Common causes include a faulty ignition coil, damaged wiring or connectors in the coil circuit, a bad spark plug, or a malfunctioning PCM (Powertrain Control Module).
4. How do I diagnose the P0357 code on my 1999 Ford F150?
Start by inspecting the ignition coil for damage, checking for loose or corroded wiring and connectors, testing the coil with a multimeter, and verifying spark plug condition.
5. Can a bad spark plug cause the P0357 code in a 1999 Ford F150?
Yes, a defective spark plug can overload or damage the ignition coil, triggering the P0357 code.
6. Is it safe to drive with the P0357 code on a 1999 Ford F150?
Driving with this code is not recommended as it can lead to poor performance, increased emissions, and potential damage to the catalytic converter.
7. How do I fix the P0357 code on my 1999 Ford F150?
Repairs may involve replacing the faulty ignition coil, repairing damaged wiring or connectors, replacing the spark plug, and in rare cases, reprogramming or replacing the PCM.
8. What tools do I need to troubleshoot the P0357 code on a 1999 Ford F150?
You’ll need an OBDII scanner, a digital multimeter, and basic hand tools for inspecting and testing the ignition coil and wiring.
9. Can the P0357 code be caused by a PCM failure in a 1999 Ford F150?
While rare, a malfunctioning PCM can cause this code if it fails to properly control the ignition coil circuit.
10. How much does it cost to fix the P0357 code on a 1999 Ford F150?
Costs vary depending on the issue, but replacing an ignition coil typically costs $50-$150 for the part, plus labor if done by a mechanic.
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