P2335 indicates that the engine control module has detected a fault in the secondary (high‑voltage) circuit of ignition coil L. The secondary circuit includes the coil’s internal winding, the spark plug wire, and the spark plug itself. A problem here prevents the coil from delivering sufficient voltage to fire the cylinder.
The coil’s secondary winding can open or short, preventing proper high‑voltage generation.
Broken wires, loose terminals, or corrosion interrupt the secondary circuit path.
A fouled, cracked, or incorrectly gapped plug can cause an open secondary circuit.
The module that drives coil L may not supply the required trigger signal.
Rare; only considered after all coil, wiring, and module checks are normal.
Very rarely. The code almost always points to the coil, its wiring, or the spark plug. The PCM is only implicated after all other possibilities are ruled out.
Yes. A fouled, cracked, or incorrectly gapped plug can create an open secondary circuit that triggers P2335.
Driving with a persistent misfire can damage the catalytic converter and increase emissions; repair should be performed promptly.
Diagnose first. Swapping the suspect coil with a known good one confirms whether the coil itself is the cause before replacement.