AutoCodes - Gmc - P0357 GMC

P0357 GMC Code - Ignition Coil 7 Control Circuit

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3
Table of contents

|P0357 GMC code possible causes

  • 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 do I fix the P0357 GMC code?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|Cost of diagnosing the P0357 GMC code

Labor: 1.0

The cost of diagnosing the P0357 GMC code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|When is the P0357 GMC code detected?

Each ignition circuit is continuously monitored by the Powertrain Control Module (PCM). The test fails when the PCM does not receive a valid pulse signal from the ignition coil.

|What are P0357 GMC code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Lack/Loss of Power
  • Engine may be harder to start
  • Engine hesitation
  • Rough engine idle

|P0357 GMC code description

The ignition system on this engine uses ignition coils with integrated power transistors. The Engine Control Module (ECM) controls the spark event for each cylinder through individual ignition coil control circuits. When the ECM commands the ignition control circuit On, electrical current flows through the primary winding of the ignition coil, creating a magnetic field. When a spark event is requested, the ECM commands the ignition control circuit Off, interrupting current flow through the primary winding. The collapsing magnetic field created by the primary winding induces a high voltage in the secondary winding, which is connected to the spark plugs. The Diagnostic Trouble Code (DTC) will be set when the control circuit commanded by the ECM state does not match the actual state.
OBDII Code P0357 Gmc - Ignition Coil 7 Control Circuit - AutoCodes.com

|Need more information with the P0357 GMC code?

Need more information on how to fix the P0357 GMC code? Get Access to Factory Service Manuals

|Need help with a P0357 GMC code?

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|P0357 GMC code comments

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