KlaroFault codeP2301
MODERATEIgnition Coil A Primary Control Circuit High
What this code means
Ignition Coil A Primary Control Circuit High.
P2301 is a generic code: it means the same thing on every make. P2301 belongs to family P23xx — Ignition system. Its page explains how to read a code and groups all its codes by part.
Type of fault
The control unit reads a voltage on this circuit above its expected range. Usual causes: a broken wire or a poor ground, a short to a supply voltage, or the component itself. As with a low signal, check the wiring and connector before the part.
Ignition coil
The ignition coil turns the 12 volts of the battery into the tens of thousands of volts needed to make a spark at the plug. On most modern engines each cylinder has its own coil, sitting directly on the plug; the control unit switches each one and monitors its primary circuit.
What you notice
The cylinder concerned misfires: shaking, loss of power, the warning light possibly flashing.
How to check it
Swap the coil with that of a neighbouring cylinder: if the fault moves with it, the coil is at fault. Also check the connector and wiring; cracks on the coil body or traces of moisture in the plug well are classic causes.
What to do
Have it checked this week. The car remains usable, but the fault will not clear itself and will fail the roadworthiness test.
Clearing a code switches the light off but repairs nothing: if the fault remains, the code comes back. Clearing a fault code yourself →
How to read this code
- PPowertrain
- 2standardised code
- 3Ignition system
- 01P2301
Other codes for the same part
- P0359Ignition Coil I Primary/Secondary Circuit Malfunction
- P0360Ignition Coil I Primary/Secondary Circuit Malfunction
- P0361Ignition Coil K Primary/Secondary Circuit Malfunction
- P0362Ignition Coil L Primary/Secondary Circuit Malfunction
- P2300Ignition Coil A Primary Control Circuit Low
- P2302Ignition Coil A Secondary Circuit
- P2303Ignition Coil B Primary Control Circuit Low
- P2304Ignition Coil B Primary Control Circuit High
- P2306Ignition Coil C Primary Control Circuit Low
- P2307Ignition Coil C Primary Control Circuit High
- P2309Ignition Coil D Primary Control Circuit Low
- P2310Ignition Coil D Primary Control Circuit High
