OBD-II code · Powertrain (generic, extended)
P2328 Ignition Coil J Primary Control Circuit High
The primary control circuit of ignition coil J reads a voltage above the expected level — typically an open primary circuit or a short to battery voltage on the primary control wire. The ECU sees no normal current flow, coil J does not fire, and the cylinder misfires. Causes: an open or disconnected primary wire, an internal open in the coil, or a faulty ECU driver.
Is it safe to drive with P2328?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen circuit in primary winding or harness for coil J
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
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 J, Ignition Coil Wiring J, Ignition Module
Related codes
- P2301Ignition Coil A Primary Control Circuit High
- P2304Ignition Coil B Primary Control Circuit High
- P2307Ignition Coil C Primary Control Circuit High
- P2310Ignition Coil D Primary Control Circuit High
- P2313Ignition Coil E Primary Control Circuit High
- P2316Ignition Coil F Primary Control Circuit High
- P2319Ignition Coil G Primary Control Circuit High
- P2322Ignition Coil H Primary Control Circuit High
- P2325Ignition Coil I Primary Control Circuit High
- P2331Ignition Coil K Primary Control Circuit High
- P2334Ignition Coil L Primary Control Circuit High
- P2326Ignition Coil I Secondary Circuit
- P2327Ignition Coil J Primary Control Circuit Low
- P2329Ignition Coil J Secondary Circuit
- P232ATCM Request Forced Engine Shutdown
- P232BCylinder 11 Fuel Injector A Offset Learning At Min Limit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.