What it means
The primary control circuit of ignition coil H reads a voltage above the expected level — typically an open primary circuit or a short to battery voltage on the primary control wire. The ECU sees no normal current flow, coil H does not fire, and the cylinder misfires. Causes: an open or disconnected primary wire, an internal open in the coil, or a faulty ECU driver.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
The ECU switches the primary side of ignition coil H to charge the coil before it fires the cylinder it serves. P2322 means the coil H primary control circuit is reading higher than expected, commonly because the control path is open or shorted to battery voltage and normal current flow is missing.
Common causes
Most likely first.
- Open circuit in primary winding or harness for coil H
- Connector pins corroded - high contact resistance
- Supply wire pinched against B+ source
Symptoms
- Check-engine light
- Engine misfire or rough running
- Reduced power or hesitation
How to diagnose it
- Confirm P2322 and review freeze-frame and misfire data to identify when the cylinder served by coil H stopped firing normally.
- Inspect the coil H connector and primary harness for a disconnected plug, broken wire, corroded pin, or insulation damage near a battery-voltage source.
- Check continuity and shorts in the coil H primary control wire with the circuit isolated as directed by the manufacturer.
- Test the coil H primary winding and ECU or igniter driver using the manufacturer’s procedure to distinguish an internal open from a harness fault.
Common fixes
- Reconnect the coil H connector securely and repair any damaged terminals.
- Repair an open or shorted-to-battery section of the coil H primary wiring.
- Replace coil H if its primary winding is confirmed open.
- Repair the ECU or igniter driver if circuit and coil tests isolate the fault there.
Can I keep driving?
Avoid driving with a persistent misfire because unburned fuel can overheat the catalytic converter. Stop if the check-engine light flashes or the engine runs roughly enough to make traffic speed unsafe.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.