Mazda
Ion sensor No.2 circuit problem: usually a misfire or failed ignition coil on cylinder 2.
P2305 fault code: what it means
P2305: Ion sensor No.2 circuit problem: usually a misfire or failed ignition coil on cylinder 2.
Usual causes, most likely first
- cylinder 2 misfire (plug, coil)
- ignition coil/ion sensor No.2 or connector
- supply wiring or fuse
P2305 by make
What the repair usually costs
- Coil packs and spark plugs (4-cylinder)NZ$280–NZ$1,000 · A$260–A$920
- Coil packs and spark plugs (V6 / V8)NZ$490–NZ$1,780 · A$480–A$1,710
Not sure what P2305 means on your car? Ask Credov.
Before you clear it
Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.
Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.