P1356 GMC Code - Ignition Control Module Output High/Pulse Detected When Grounded Cylinder 6
Quick Answer
The P1356 diagnostic trouble code (DTC) for GMC vehicles specifically points to an issue with the Ignition Control Module (ICM) output being high or pulsing detected when the cylinder 6 is being grounded. Common causes include Faulty Ignition Control Module (ICM), Damaged wiring or connectors in the ignition system, Malfunctioning ignition coil. 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
- P1356 GMC indicates Ignition Control Module Output High/Pulse Detected When Grounded Cylinder 6.
- Common causes
- Common causes include Faulty Ignition Control Module (ICM), Damaged wiring or connectors in the ignition system, Malfunctioning ignition coil.
- 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 P1356 GMC Description
The P1356 diagnostic trouble code (DTC) for GMC vehicles specifically points to an issue with the Ignition Control Module (ICM) output being high or pulsing detected when the cylinder 6 is being grounded. The ICM plays a crucial role in the ignition system of the vehicle, controlling the timing of the spark plugs to ensure proper combustion in the engine cylinders. When this code is triggered, it indicates a malfunction in the ICM's ability to control the ignition timing for cylinder 6, which can lead to poor engine performance and potential long-term damage if not addressed promptly.
Common Causes of P1356 GMC
- Faulty Ignition Control Module (ICM)
- Damaged wiring or connectors in the ignition system
- Malfunctioning ignition coil
- Issues with the Engine Control Module (ECM)
- Electrical interference or grounding issues
Symptoms of P1356 GMC
- Rough idle
- Engine misfiring
- Poor acceleration
- Decreased fuel efficiency
- Engine stalling
How to Fix P1356 GMC
- Diagnose the specific cause of the issue by using a scan tool to pinpoint the exact problem area.
- Inspect the wiring and connectors in the ignition system for any damage or corrosion, repairing or replacing as necessary.
- Test the Ignition Control Module (ICM) for proper functionality and replace if found to be faulty.
- Check the ignition coil for any malfunctions and replace if needed.
- Clear the diagnostic trouble code from the vehicle's computer and test drive to ensure the issue has been resolved.
Cost to Fix P1356 GMC
The cost of repairing a P1356 code for a GMC vehicle can vary depending on the specific cause of the issue and the labor rates in your area. On average, the repair costs for this type of problem can range from $200 to $500, including parts and labor. However, it's essential to keep in mind that prices may fluctuate based on factors such as the location of the repair shop, the make and model of the vehicle, and the extent of the repairs needed. It's recommended to consult with a trusted mechanic or auto repair shop to get an accurate estimate for your specific situation.
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