Powertrain, generic (extended)

P2331 Ignition Coil K Primary Control Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P2331 is the short-to-power version for coil K, cylinder 11 in a straightforward count. No manufacturer documents this code publicly; neither Ford nor GM, whose OBD descriptions explain the primary codes in detail, build engines with eleven or more coils. By analogy with Ford's description of P2301 to P2328, the driver would register current or voltage above the short-circuit limit while switched, and many systems then disable the injector of that cylinder to keep raw fuel out of the catalysts – Ford does this for 30 s at a time. On a V12 the loss of one cylinder is subtle, so the warning light may be the first sign. Look for a coil lead rubbing against a supply wire and for a coil with internal leakage; the low-side partner is P2330.

Likely causes

Coil K signal wire shorted to a supply wire
Coil K with internal leakage
Engine module output for coil K defective

Symptoms

  • Check engine light on
  • Cylinder 11 may be fuel-cut temporarily
  • Slightly uneven idle

Repair estimate

DifficultyHardWorkshop job
Parts and labour€60–800
Time0.5–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

ignition coilcoil driverignition wiring

Related codes

P2330P0361P2334P2328P0311

References: law.cornell.edu, newtonnet.co.uk, en.wikipedia.org.