Ignition Coil "D" Primary Control Circuit High
P2310 indicates the ignition coil D primary control circuit is detecting a high voltage condition. The PCM has identified that the voltage in the coil driver circuit exceeds normal operating parameters, which can prevent proper spark generation on that cylinder.
What You Might Notice
- Engine misfire on cylinder D
- Diminished engine performance
- Reduced fuel efficiency
- Rough idle or hesitation during acceleration
- Check Engine Light illuminated
Most Common Causes
- 1
Faulty ignition coil D
The ignition coil pack itself may have internal resistance issues or a short circuit causing high voltage readings in the primary control circuit.
- 2
Wiring or connector issues
Damaged, corroded, or loose wiring and connectors between the PCM and ignition coil D can cause abnormal voltage signals.
- 3
PCM driver circuit fault
The engine control module's ignition coil driver circuitry may be failing, preventing proper voltage regulation to the coil.
- 4
Engine oil contamination or spark plug issues
Excessive resistance in the spark plug circuit or poor engine condition can affect coil driver readings.
How to Diagnose It
- 1
Check Faulty ignition coil D — The ignition coil pack itself may have internal resistance issues or a short circuit causing high voltage readings in the primary control circuit.
- 2
Check Wiring or connector issues — Damaged, corroded, or loose wiring and connectors between the PCM and ignition coil D can cause abnormal voltage signals.
- 3
Check PCM driver circuit fault — The engine control module's ignition coil driver circuitry may be failing, preventing proper voltage regulation to the coil.
- 4
Check Engine oil contamination or spark plug issues — Excessive resistance in the spark plug circuit or poor engine condition can affect coil driver readings.
How to Fix It
- 1
Inspect and replace ignition coil D
Remove the ignition coil from cylinder D, test it for proper resistance and operation, and replace if faulty. This is the most common fix for this code.
- 2
Check wiring and connectors
Inspect all wiring harnesses and connectors between the PCM and ignition coil D for corrosion, damage, or loose connections. Repair or replace damaged components.
- 3
Test and reprogram PCM
Use diagnostic equipment to test the PCM's ignition coil driver circuit output. If the PCM is faulty, it may need reprogramming or replacement.
- 4
Inspect spark plug and cylinder condition
Check the spark plug for wear and remove carbon deposits from the cylinder. Replace the spark plug if worn or fouled.
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