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P2327 Ignition System
Ignition Coil J Primary Control Circuit Low
P2327 means the ECM detected low voltage on the primary control circuit for ignition coil J, used on high-cylinder-count engines. The cylinder served by coil J is likely misfiring.
🚗 Not recommended. The affected cylinder is misfiring and can damage the catalytic converter.
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🎯 Top Causes, Ranked by Likelihood
#1 Failed ignition coil (cylinder J) $30-$120
Internal primary winding fault in the coil unit.
#2 Wiring or connector fault at the coil $40-$250
Corroded connector, chafed wire, or poor ground.
#3 ECM driver circuit fault $200-$900
Rare failure of the coil driver in the ECM.
🩺 Common Symptoms Single cylinder misfire Rough idle and shaking Check engine light Loss of power Increased fuel use 💰 Repair Cost: DIY vs Shop
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🔧 How to Diagnose P2327 1 Determine which cylinder coil J feeds on your engine
2 Swap the coil with an adjacent cylinder to see if the code follows
3 Inspect the coil connector and wiring
4 Replace the coil if the fault follows it
❓ Frequently Asked Questions Can I drive with P2327?
Not for long. A misfiring cylinder can overheat and destroy the catalytic converter.
Which engines use coil J?
Coil J is found on V10 and V12 engines with one coil per cylinder.
How much to fix P2327?
A single coil is $30-$150 DIY, or $120-$400 at a shop.
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