Powertrain
generic / SAE
P2301
Ignition Coil A Primary Control Circuit High
The primary control circuit of ignition coil A 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 A 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.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number3 / 01
Possible causes
- Primary wire shorted to battery high
- Open primary winding medium
- Connector pins corroded - high contact resistance low
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 50–250 €
- Estimated time: 0.2–1 h
- Component: ignition coil
- Component: coil driver
- Component: ignition wiring
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012