P0357 2003 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 2003 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 2003 Ford F150 Description
What are the Possible Causes of the DTC P0357 2003 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 2003 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 2003 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 2003 Ford F150 Code
1. What does the OBDII code P0357 mean on a 2003 Ford F150?
P0357 indicates an Ignition Coil 'G' Primary/Secondary Circuit Malfunction, meaning the PCM has detected a problem in the coil circuit for cylinder #7.
2. What are the symptoms of code P0357 on a 2003 Ford F150?
Common symptoms include engine misfires, rough idling, poor acceleration, decreased fuel efficiency, and the Check Engine Light turning on.
3. What causes the P0357 code on a 2003 Ford F150?
Possible causes include a faulty ignition coil, damaged wiring or connectors in the coil circuit, a bad spark plug, or a malfunctioning PCM.
4. How do I identify which ignition coil is cylinder #7 on a 2003 Ford F150?
In the 5.4L V8 engine, cylinder #7 is located on the driver's side, second cylinder from the back.
5. Can a faulty spark plug cause the P0357 code?
Yes, a faulty or worn spark plug can cause ignition coil issues, leading to the P0357 code.
6. How can I fix the P0357 code on my 2003 Ford F150?
Start by inspecting and replacing the ignition coil on cylinder #7 if needed, along with checking for damaged wiring or connectors. Replace the spark plug if it's worn or faulty.
7. Is it safe to drive with a P0357 code on a 2003 Ford F150?
Driving with this code is not recommended, as it can lead to poor performance, increased emissions, and potential engine damage over time.
8. How do I test the ignition coil for cylinder #7?
You can swap the ignition coil with another cylinder and see if the code follows. If the code changes to a different cylinder, the coil is likely faulty.
9. Could the PCM cause the P0357 code on a 2003 Ford F150?
Yes, although rare, a malfunctioning PCM or a software issue can cause this code if all other components check out.
10. Will clearing the P0357 code fix the issue on a 2003 Ford F150?
Clearing the code will turn off the Check Engine Light temporarily, but the underlying problem must be fixed, or the code will return.
Discuss the causes and fixes for P0357 2003 Ford F150 OBDII Code
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Hi im . Tim. My question is. My obd 3 ys ago read a lean code next misfire #6 cylinder so i changed coil pack with 3 still got misfie 6 reading plus ignition g open curcuit changed back just reading the g primary/ secondary 352 i think .now. 2001 f150 v8 4.6. Hope you understand my right to the point guestion. Check all basics,oil in pluge.etc
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