P2330: Ignition Coil K Primary Control Circuit Low

P2330 belongs to coil K, the eleventh coil, which only twelve-cylinder petrol engines have – V12 units such as those built by BMW, Mercedes-Benz, Lamborghini or Ferrari, or the VW group's W12. No manufacturer documents this code publicly; the published coil lists stop earlier (Ford at J, GM at H). The meaning follows from the analogous lower codes: the module sees the coil K driver line held at ground potential, as GM describes for its cylinder 8 code P2321 (short to ground judged against controller voltage limits, 50 of 63 samples). Under CARB's comprehensive component rules such a circuit fault on an output must be detected. Wiring and connector of that one coil should be checked before the module is suspected; an open circuit would be P0361.

Symptoms

• Check engine light on
• Cylinder 11 not firing
• Slight roughness, often hard to feel on a V12

Most likely causes

• Coil K shorted internally
• Coil K control wire damaged and grounded in the bank harness
• Coil K driver in the engine module faulty

What to check, in order

Start with the simplest. You can tick off each step.

1. Check the connector and wiring of the coil indicated
2. With the connector unplugged, check whether the signal wire is making contact with ground.
3. Check the condition of the spark plug
4. Swap the coil with another cylinder and see if the code changes
5. Measure the power supply and control signal using the manufacturer's wiring diagram

Good to know

• Repair difficulty: hard
• It can trigger limp mode.
• It affects emissions.

What each character of P2330 means

• P: Powertrain: engine and transmission
• 2: Generic code: same on every make
• 3: Ignition and misfires
• 30: Specific fault in that system

Frequently asked questions

Can I keep driving with code P2330?

Drive as little as possible. If you feel jerking or the light flashes, stop: a misfire can damage the catalytic converter.

What causes code P2330?

The most common causes are: coil K shorted internally; coil K control wire damaged and grounded in the bank harness; coil K driver in the engine module faulty.

Related codes

• P2331Ignition Coil K Primary Control Circuit High
• P2332Ignition Coil K Secondary Circuit
• P0361Ignition Coil K Primary Control Circuit/Open
• P2333Ignition Coil L Primary Control Circuit Low
• P0311Cylinder 11 Misfire Detected

Sources

• law.cornell.edu: 13 CCR 1968.2
• gsi.ext.gm.com: 19OBDG03B Diagnostics
• en.wikipedia.org: V12 engine

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.