OBD-II code · Powertrain (generic, extended)
P2334 Ignition Coil L Primary Control Circuit High
The primary control circuit of ignition coil L 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 L 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 P2334?
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 L
- 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 L, Ignition Coil Wiring L, 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
- P2328Ignition Coil J Primary Control Circuit High
- P2331Ignition Coil K Primary Control Circuit High
- P2332Ignition Coil K Secondary Circuit
- P2333Ignition Coil L Primary Control Circuit Low
- P2335Ignition Coil L Secondary Circuit
- P2336Cylinder 1 Above Knock Threshold
- P2337Cylinder 2 Above Knock Threshold
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.