P0211 code: Injector Circuit/Open - Cylinder 11
P0211 means injector Circuit/Open - Cylinder 11. The code says where to look, not what failed — the fix depends on which cause your car actually has.
What P0211 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.
P0211 symptoms
- 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 P0211
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 →
How to fix P0211
Advanced — usually a shop job unless you’re well equipped
- Confirm cylinder 11's bank on your twelve
Cylinder 11 only exists on V12 and W12 engines. With bank-by-bank numbering it sits toward the rear of the second bank; with alternating numbering it ends up at the rear of the first; W12 layouts differ again. Find it on your engine's diagram first, because access and harness routing change completely.
- Rule out a whole-bank fault
If injector codes for several cylinders on the same bank appear together, suspect that bank's feed fuse, relay, or the module driving it rather than injector 11. A lone P0211, often paired with P0311, keeps the focus on cylinder 11's own plug, wire, and injector.
- Check the connector and nearby harness
Rear-of-bank injector plugs on twelve-cylinder engines live in a heat-soaked area with little airflow. Look at the cylinder 11 plug for a cracked latch, corroded pins, or oil from a leaking cam cover or intake gasket, and check the wiring for brittle insulation where it bends.
- Test resistance only where it is safe
With port injectors, measure injector 11's winding and compare it to others on the same bank. Many modern twelves are direct-injected, with a high-voltage drive circuit that must never be probed live with test lights or noid lights; check those injectors using the procedure in the service manual.
- Leave the teardown to a platform specialist
Replacing a rear injector or a buried harness section on a V12 often means removing plenums, coil packs, or covers with one-time-use gaskets and fasteners. A shop that knows the platform, with the right scan software for module work, is the realistic route once the simple checks are done.
DIY or shop? The first diagnostic steps — reading codes, looking at the cylinder 11 connector, and resistance testing where the engine uses port injection — are fine for a capable owner. The repair itself rarely is: twelve-cylinder engine bays are packed tight, many use direct injection, and parts are model-specific and costly to get wrong. Engine-computer faults on these cars also need dealer-level or equivalent software, so most owners do best capturing the codes and freeze frame and handing that to a specialist.
Tools for the DIY steps: Scan tool with access to all engine modules · Digital multimeter · Flashlight and inspection mirror · Cylinder numbering diagram
Not sure which step applies to your car? Get the likely cause for your exact vehicle before buying anything for P0211.
Start a case with P0211 and your car. Redline weighs these causes against what your car shows, and names the check that would settle it before you buy parts.
Can I drive with P0211?
Redline can’t determine from a symptom or code alone whether your car is safe to drive.
P0211: common questions
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.
Related trouble codes
Don’t have a scanner yet? A ~$25 Bluetooth adapter reads codes like P0211 from your phone. See our guide to the best OBD2 Bluetooth adapters. Run a repair shop? See Redline for shops.
Generic OBD-II reference. Manufacturer-specific behavior varies. Confirm with a scan tool and, for safety-related codes, a professional inspection. Cost ranges are reference ranges, not quotes.
Seeing P0211 on your car?
Every problem becomes a Case. Tell Redline what the car is doing: it shows what the evidence supports, what’s still missing, and what to check next, before you approve a repair.
“Inner pad ~1 mm. Outer pad 3 mm.”
Next: check the slide pins move freely before buying parts.