P0357 2018 GMC Sierra Code - Ignition Coil 7 Control Circuit
Quick Answer
The ignition system on this engine uses ignition coils with integrated power transistors. 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 2018 GMC Sierra indicates Ignition Coil 7 Control Circuit.
- 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 2018 GMC Sierra Description
What are the Possible Causes of the DTC P0357 2018 GMC Sierra?
- 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 2018 GMC Sierra?
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 P0357 2018 GMC Sierra 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.
Need more information about the P0357 2018 GMC Sierra code?
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Frequently Asked Questions about P0357 2018 GMC Sierra Code
What does the OBDII code P0357 mean for a 2018 GMC Sierra?
P0357 indicates an issue with the ignition coil 7 control circuit, which may affect engine performance.
What are the common symptoms of code P0357 in a 2018 GMC Sierra?
Symptoms include engine misfires, rough idling, reduced power, and possibly an illuminated Check Engine Light.
What causes the P0357 code to appear?
Common causes include a faulty ignition coil, damaged wiring or connectors, or a malfunctioning PCM (Powertrain Control Module).
Can I drive my 2018 GMC Sierra with the P0357 code?
Driving with this code is not recommended as it may cause further engine damage or poor performance due to misfires.
How do I diagnose the P0357 code in my GMC Sierra?
Use an OBDII scanner to confirm the code, then inspect ignition coil 7, its wiring, and connectors for damage or corrosion.
What tools do I need to fix the P0357 code?
You’ll need an OBDII scanner, a multimeter for electrical testing, and basic hand tools to check and replace components.
How do I fix the P0357 code on a 2018 GMC Sierra?
Repairs may involve replacing the faulty ignition coil, repairing damaged wiring, or replacing the PCM if necessary.
How much does it cost to fix the P0357 code?
Ignition coil replacement typically costs $100-$250, while wiring repairs or PCM replacement can vary significantly depending on labor and parts.
Can a bad ignition coil cause other problems in my GMC Sierra?
Yes, a bad ignition coil can lead to engine misfires, reduced fuel efficiency, and potential damage to the catalytic converter.
How can I prevent the P0357 code from recurring?
Regular maintenance, including inspecting wiring and ignition components, can help prevent future issues with the ignition control circuit.
Discuss the causes and fixes for P0357 2018 GMC Sierra OBDII Code
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