P2333 Ignition Coil L Primary Control Circuit Low

P2333 is the ground-short code for coil L, the twelfth and final coil letter in the SAE scheme. It fits only V12 or W12 engines. There is no public manufacturer documentation for it; the published lists of Ford and GM end at coils J and H. Read by analogy with GM's description of its lower coil codes, the module compares the voltage on the coil L control line with its own limits and records a short to ground after repeated bad samples. CARB's comprehensive component monitoring obliges the system to catch this kind of circuit fault. Note that the letter is a fixed SAE slot, not a cylinder number; a maker may assign coil L to a cylinder other than 12, so the service information of the vehicle decides which coil to inspect. The open-circuit partner is P0362.

Likely causes

Symptoms

• Check engine light on
• One cylinder (usually 12) not firing
• Mild roughness at idle

Repair estimate

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

Parts involved

Related codes

References: law.cornell.edu, gsi.ext.gm.com, en.wikipedia.org.