P0211

Injector Circuit Malfunction - Cylinder 11

P0211 is a generic OBD-II powertrain diagnostic trouble code: Injector Circuit Malfunction - Cylinder 11. It is logged by the engine control unit when the fuel/inj monitor detects that a specific fault threshold has been exceeded — typically resulting in the malfunction-indicator lamp (MIL / check-engine light) being illuminated.

Code
P0211
Group
Powertrain
System
Fuel/Inj
Severity
Warning (MIL on, possible limp mode)
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What P0211 means

P0211 indicates the PCM has detected an electrical fault on the injector drive circuit for cylinder 11. The PCM driver for cylinder 11 expects to pull the injector ground line low during the injection pulse and release it high between events; abnormal voltage or resistance on this line—caused by an open coil, wiring fault, or failed driver stage—causes the module to log P0211 and illuminate the MIL. This is a purely electrical circuit fault and must not be confused with P0311 (cylinder 11 combustion misfire), which is triggered by crankshaft acceleration irregularities and can have ignition or compression causes.

Cylinder 11 is present only on V12 engines and a small number of large-displacement V10 platforms. Typical applications include BMW N73/N74/S70 V12 (7-Series, 8-Series, Rolls-Royce Silver Spirit), BMW S70/2 (McLaren F1), Ferrari and Lamborghini V12 (Aventador, 812 Superfast), Audi/VW W12 (A8 L, Bentley Continental), Rolls-Royce and Bentley 6.75 L V8-derived V12, and Mercedes-AMG M120/M137 V12. In these tightly packaged engine bays, wiring harness integrity and correct connector seating are critical; vibration and heat cycles make intermittent faults particularly common.

With cylinder 11 not contributing, the engine loses a significant share of its power balance, runs rough, and may exhibit exhaust backfires if the PCM intermittently re-enables the circuit. Repair requires careful harness inspection, injector coil testing, and verification of the PCM driver output before any component is replaced.

Common causes

Most-frequently reported root causes when P0211 is logged.

  • 1
    Failed fuel injector coil on cylinder 11 with an open or shorted internal winding.
  • 2
    Broken, chafed, or corroded conductor in the cylinder 11 injector wiring branch.
  • 3
    Loose, backed-out, or corroded electrical connector at the cylinder 11 injector.
  • 4
    Short circuit to ground or to battery positive on the injector signal wire.
  • 5
    Failed PCM injector driver transistor for the cylinder 11 channel.
  • 6
    Vibration-induced intermittent connection at a wiring harness retaining clip or splice near cylinder 11.
  • 7
    Water or oil ingress into the injector connector causing tracking or corrosion on the signal contacts.

Symptoms drivers notice

MIL illuminated, often accompanied by P0311 (cylinder 11 misfire).
Rough idle and engine vibration from the firing order imbalance of an inoperative cylinder 11.
Noticeably reduced power and poor throttle response, especially in high-cylinder-count luxury/performance vehicles.
Elevated fuel consumption and worsened exhaust emissions.
Possible strong fuel odour from the exhaust if the injector driver intermittently activates and raw fuel passes through the cylinder.

How to diagnose P0211

A typical diagnostic flow when this code is present.

  1. 1
    Read all stored DTCs with a scan tool; record any P0311 misfire and freeze-frame data to determine whether the fault is cold-start related or load-dependent.
  2. 2
    Visually inspect the cylinder 11 injector connector and the harness routing through the engine bay for corrosion, moisture, damaged insulation, or loose retaining clips.
  3. 3
    Disconnect the cylinder 11 injector and measure coil resistance; compare against the manufacturer specification for the engine (typically 12–17 Ω high-impedance; some GDI injectors 1–3 Ω).
  4. 4
    Use a noid light or oscilloscope at the injector connector during engine cranking to confirm the PCM is generating a pulse signal for cylinder 11.
  5. 5
    If no pulse is detected, run a continuity test and short-to-ground/short-to-voltage test on the injector signal wire from the connector back to the ECU driver pin.
  6. 6
    Swap the cylinder 11 injector with a known-good unit from an adjacent cylinder; if the fault migrates to that cylinder position, the injector itself is the cause.
  7. 7
    If the injector and wiring test within specification, consult the manufacturer wiring diagram to test the PCM driver output pin directly and follow the OEM-specific ECU replacement procedure.

Related powertrain codes

Frequently asked questions

Which engines can store P0211?

P0211 is exclusive to engines with at least 11 cylinders: BMW N73, N74, S70/2 V12; Mercedes-AMG M120 and M137 V12; Ferrari 6.5 L V12 (812 series) and earlier V12 models; Lamborghini 6.5 L V12 (Aventador/Countach heritage); Audi/VW W12 (A8 L, Bentley Continental GT/Flying Spur); and Rolls-Royce/Bentley V12 variants.

Is P0211 the same as a cylinder 11 misfire?

No. P0211 is a circuit fault code—the PCM detected abnormal voltage on the electrical injector driver for cylinder 11, meaning fuel delivery is compromised at the circuit level. A cylinder 11 misfire would be stored as P0311, which is a crankshaft-based combustion anomaly detection. Both can appear together if the circuit fault prevents fuelling and therefore causes a misfire, but P0311 can also appear without P0211 if the injector circuit is intact but ignition or compression is the problem.

Why are injector circuit faults more common in V12 engines?

V12 engines have densely packaged engine bays where wiring harnesses are routed close to hot exhaust manifolds and are subject to greater thermal cycling. More cylinders means longer, more complex harness runs with additional connector joints, each representing a potential point of corrosion or vibration-induced intermittent contact. Age-related insulation degradation is a known issue on high-kilometre examples of BMW N73/N74 and Bentley W12 platforms.

How do I tell whether the PCM driver or the injector is faulty?

With a noid light or oscilloscope at the cylinder 11 injector connector while cranking: if a proper drive pulse is present and the injector resistance is out of specification, the injector is the likely cause. If no pulse is generated despite confirmed power and ground at the connector, the PCM driver or the wiring between the injector and the ECU is the source of the fault.

Disabling P0211 in software

RaceTune can permanently disable P0211 — and any other OBD-II diagnostic trouble code — on every ECU family we support. The monitor is disabled inside the ECU itself, so the fault stops being logged: the warning light stays off and the engine never enters limp mode for this code. The change is tied to your exact software version.

Permanent
The monitor is disabled in the ECU itself — not just cleared. It cannot return.
Tailored to your file
Each patch is matched to your specific software version — never a one-size-fits-all file.
Reversible
The original file is always preserved. Reflash the stock to return the ECU to factory state.

Software modifications affect emissions compliance and are not road-legal in many jurisdictions. RaceTune service files are intended for motorsport, off-road, and export use.

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