OBD Codes List

Diagnostic reference · P2300

P2300

Ignition Coil A Primary Control Circuit Low

System
Ignition and misfire (P code)
Lamp
Check Engine Light
Category
Powertrain - Ignition

What it means

P2300 means Ignition Coil A Primary Control Circuit Low.

Check these first

  • An ignition coil A primary control wire shorted to ground
  • A failed ignition coil A
  • An open coil A ground circuit
  • Corrosion at the coil A connector

What to do next

  1. Check for spark at the cylinder fed by coil A
  2. Test the coil A primary control wire for a short to ground
  3. Check the coil A ground circuit
  4. Measure ignition coil A primary resistance
  5. Replace ignition coil A if the circuit tests good
  6. Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.