Code Definition

P2302 — Ignition Coil ‘A’ Secondary Circuit

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Mazda

About P2302

P2302 is a generic (obd-ii standard) powertrain diagnostic trouble code recorded for Mazda vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P2302 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P2302 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The Powertrain Control Module (PCM) monitors ignition coil A secondary ignition performance by evaluating primary circuit behaviour and crankshaft speed fluctuations during combustion events. DTC P2302 is set when the PCM determines that the secondary ignition output of coil A is not producing the expected spark energy, indicated by abnormal ionisation feedback, insufficient secondary voltage, or a misfire pattern attributed to that cylinder. The secondary side of the coil delivers the high voltage that jumps the spark plug gap to ignite the mixture, so a weak secondary output produces a poor ...

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