OBD-II code · Powertrain (generic, extended)
P2305 Ignition Coil B Secondary Circuit
The secondary side of ignition coil B is faulty. Spark energy at the corresponding spark plug is insufficient, producing misfires.
Is it safe to drive with P2305?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyWorn spark plug
- PossibleCoil secondary failure
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.2–1 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Ignition Coil, Spark Plug, Spark Plug Wire
Related codes
- P2302Ignition Coil A Secondary Circuit
- P2308Ignition Coil C Secondary Circuit
- P2311Ignition Coil D Secondary Circuit
- P2314Ignition Coil E Secondary Circuit
- P2317Ignition Coil F Secondary Circuit
- P2320Ignition Coil G Secondary Circuit
- P2323Ignition Coil H Secondary Circuit
- P2326Ignition Coil I Secondary Circuit
- P2329Ignition Coil J Secondary Circuit
- P2332Ignition Coil K Secondary Circuit
- P2335Ignition Coil L Secondary Circuit
- P2359Ignition Coil L 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
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.