OBD-II code · Powertrain (generic, extended)
P2323 Ignition Coil H Secondary Circuit
A fault is detected on the secondary (high-voltage) side of ignition coil H. The spark delivered to the plug is missing or too weak, causing a misfire on the cylinder served by coil H. Causes: a worn spark plug or wide gap, a cracked coil or boot, carbon tracking, or an open or leaking secondary winding.
Is it safe to drive with P2323?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySpark plug worn or fouled
- PossibleSecondary breakdown inside coil H
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.4–1.2 h
- Emissions test
- Likely to fail
- Parts involved
- Ignition Coil H, Spark Plug Cyl H, Ignition Secondary Lead
Related codes
- P2302Ignition Coil A Secondary Circuit
- P2305Ignition Coil B 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
- 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
- P2321Ignition Coil H Primary Control Circuit Low
- P2322Ignition Coil H Primary Control Circuit High
- P2324Ignition Coil I Primary Control Circuit Low
- P2325Ignition Coil I Primary Control Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.