OBD codes / P0211
P0211
SeriousInjector Circuit/Open - Cylinder 11
A V12 will hide one dead cylinder well, but its catalytic converters won't survive a steady diet of unburned fuel — and they are extraordinarily expensive on twelve-cylinder cars. Treat P0211 as a prompt repair: gentle driving only, and stop entirely if the check-engine light flashes.
What this code means
P0211 indicates the engine computer caught an electrical fault — an open, a short, or wrong resistance — in the circuit driving the cylinder 11 fuel injector. A cylinder 11 exists only on V12 engines (and the occasional V10 counting scheme aside, in practice this is V12 territory), so this code appears almost exclusively on twelve-cylinder luxury and performance cars. The nature of the fault matters: it is electrical, not a clog, so the fix lives in the connector, the wiring, or the injector's coil winding rather than in fuel cleaners. Corroded or loose connectors and chafed harness wiring are the common findings; an injector with a failed internal winding comes next; a dead driver stage in the engine computer is the rare last resort of diagnosis. Because the cylinder usually stops firing entirely, the cylinder 11 misfire code P0311 tends to set at the same time.
Symptoms you might notice
- Misfire on cylinder 11, usually alongside P0311
- Idle roughness — subtle on a V12 but out of character for one
- Noticeable loss of the engine's usual smoothness and power
- Check-engine light, flashing if the misfire is active
- Possible hard starting
What it costs to fix
Typical range: $100–$600 · about ~0.5–2 hrs of labor
| If the cause is… | Part | Labor |
|---|---|---|
| Fuel injector (single) | $50–$300 | ~0.5–2 hrs |
| Wiring / connector repair | $10–$60 | ~0.5–1.5 hrs |
Cylinder 11 means a V12, and V12 engine bays are among the tightest — injector access frequently requires removing intake plumbing or covers, and parts for these vehicles carry premium pricing. The ranges here reflect common gasoline injectors; expect the high end or beyond on exotic applications.
The price swings on which cause it turns out to be — so confirm the cause before paying. Diagnose P0211 for my exact vehicle →
Frequently asked
Which vehicles can actually set P0211?
Only engines with eleven or more cylinders — in practice, V12s. If you're seeing this code on anything smaller, re-scan the vehicle; a genuine cylinder 11 circuit fault can't exist on an engine that doesn't have a cylinder 11.
Why fix P0211 quickly if the car still runs smoothly?
Because the smooth feel is the trap. The dead cylinder is quietly pushing raw fuel into the catalytic converter, and an overheated converter on a V12 is one of the most expensive routine failures these cars can have. The circuit fix is cheap by comparison.
Is this something I can diagnose myself?
The first steps, yes: check the injector connector for corrosion and full engagement, look over the visible harness for chafe, and measure the injector's resistance against a neighbor. On a V12 the access work can be involved, so many owners hand off after those checks.
How much does the repair cost?
A connector or wiring repair stays cheap even on a V12. An injector replacement is a moderate part plus up to two hours of labor — more if intake components must come off — and premium-brand parts pricing can push the total past typical estimates for mainstream cars.
Seeing P0211 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0211 for my vehicleRelated trouble codes
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Generic OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.