Ignition Coil "G" Primary Control Circuit High
P2319 indicates the ignition coil G primary control circuit is detecting a voltage level higher than the PCM's expected range. This typically means the coil driver circuit in the PCM cannot properly control the ignition coil, preventing normal spark generation for that cylinder.
What You Might Notice
- Engine misfire on cylinder G
- Diminished engine performance and power loss
- Reduced fuel efficiency
- Rough idle or hesitation during acceleration
- Check Engine Light illuminated
Most Common Causes
- 1
Faulty ignition coil G
The ignition coil itself may have an internal short or resistance issue causing abnormal voltage readings in the primary circuit.
- 2
Damaged wiring or connector to coil G
Corroded, broken, or shorted wiring between the PCM and ignition coil G can cause the circuit to read high voltage.
- 3
PCM driver circuit failure
The ignition coil driver transistor inside the PCM may be failing or already failed, preventing proper voltage regulation.
- 4
Poor ground connection at coil G
A loose or corroded ground connection can cause voltage measurement errors and circuit control problems.
How to Diagnose It
- 1
Check Faulty ignition coil G — The ignition coil itself may have an internal short or resistance issue causing abnormal voltage readings in the primary circuit.
- 2
Check Damaged wiring or connector to coil G — Corroded, broken, or shorted wiring between the PCM and ignition coil G can cause the circuit to read high voltage.
- 3
Check PCM driver circuit failure — The ignition coil driver transistor inside the PCM may be failing or already failed, preventing proper voltage regulation.
- 4
Check Poor ground connection at coil G — A loose or corroded ground connection can cause voltage measurement errors and circuit control problems.
How to Fix It
- 1
Test and replace ignition coil G
Use a multimeter to test the ignition coil G for proper resistance and voltage response. If out of specification, replace the coil pack or coil on plug unit.
- 2
Inspect wiring and connectors
Check all wiring between the PCM and ignition coil G for damage, corrosion, or loose connections. Repair or replace damaged wires and clean/reseat connectors.
- 3
Check ground connections
Verify the ground wire from the ignition coil G is secure and free of corrosion. Clean or replace the ground connection if needed.
- 4
Service or reprogram PCM
If wiring and coil are confirmed good, the PCM driver circuit may have failed. Professional diagnosis may require PCM reprogramming or replacement.
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