P1357 GMC Code - Ignition Control Module Output High/Pulse Detected When Grounded Cylinder 7
Quick Answer
The diagnostic trouble code P1357 for a GMC vehicle indicates that there is an issue with the Ignition Control Module (ICM) output being high or pulsing when cylinder 7 is grounded. Common causes include Faulty Ignition Control Module (ICM), Wiring issues or damaged connectors related to cylinder 7, Defective spark plugs or ignition coils in cylinder 7. 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
- P1357 GMC indicates Ignition Control Module Output High/Pulse Detected When Grounded Cylinder 7.
- Common causes
- Common causes include Faulty Ignition Control Module (ICM), Wiring issues or damaged connectors related to cylinder 7, Defective spark plugs or ignition coils in cylinder 7.
- 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.
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Code P1357 GMC Description
The diagnostic trouble code P1357 for a GMC vehicle indicates that there is an issue with the Ignition Control Module (ICM) output being high or pulsing when cylinder 7 is grounded. The ICM is a crucial component of the ignition system, responsible for controlling the ignition timing and firing of the spark plugs. When this code is triggered, it means that there is a malfunction in the ICM output related to cylinder 7, which can lead to misfires, rough idling, and decreased engine performance.
Common Causes of P1357 GMC
- Faulty Ignition Control Module (ICM)
- Wiring issues or damaged connectors related to cylinder 7
- Defective spark plugs or ignition coils in cylinder 7
- Engine misfires or mechanical issues in cylinder 7
- Software or programming issues with the engine control module (ECM)
Symptoms of P1357 GMC
- Rough idling or engine misfires
- Decreased engine performance
- Difficulty starting the vehicle
- Illumination of the check engine light
- Increased fuel consumption
How to Fix P1357 GMC
- Diagnose the specific cause of the issue using a scan tool to pinpoint the exact problem within the ignition system.
- Inspect the Ignition Control Module (ICM) and related wiring for any signs of damage or wear.
- Test the spark plugs, ignition coils, and other components in cylinder 7 to ensure they are functioning correctly.
- Replace any faulty components, such as the ICM, spark plugs, or wiring, as needed.
- Clear the diagnostic trouble codes and test drive the vehicle to verify that the issue has been resolved.
Cost to Fix P1357 GMC
The cost of repairing a P1357 diagnostic trouble code can vary depending on the specific cause of the issue and the parts/labour rates in your area. On average, the repair for this issue can range from $200 to $500, including parts and labour. However, it's essential to consult with a professional mechanic to get an accurate estimate based on your vehicle's make and model, as well as any additional factors that may affect the repair costs. Keep in mind that diagnostic time and labour rates can fluctuate, so it's advisable to do some research and obtain quotes from different repair shops before proceeding with the repairs.
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