P216D: Fuel Injector Group F Supply Voltage Circuit/Open

P216D is the general fault of injector group F, which GM petrol direct injection equates with cylinder 6; its 2024 tables (24OBDG07) call it injector F. GM uses this code for shorts on the high side rather than opens: the 2008 3.6 LLT sets it for cylinder 6 shorted to ground or battery, while an open on either side goes to P0206; the 2024 tables count two events of less than 0.5 ohm to ground or supply, above 9 V, one trip. Two bulletins name it. PIP4924D covers 3.0 and 3.6 V6 models such as Enclave, Traverse, CTS and Camaro with chafed injector harnesses. Bulletin 24-NA-106 for the 2023 and 2024 Corvette with the LT6 lists P216D as cylinder 6 alongside P2149, P2155 and P217D, all bank 2, caused by water in a wrong 12-way connector.

Symptoms

• Check engine lamp on, cylinder 6 misfire
• With the LT6 several bank 2 codes and fuel pressure faults at once

Most likely causes

• Injector harness rubbed through on V6 engines
• Water in the bank 2 injector harness connector (Corvette LT6)
• Cylinder 6 injector shorted

What to check, in order

Start with the simplest. You can tick off each step.

1. Check the connector and wiring of the injector indicated
2. Check the continuity of the wire between the component and the control module.
3. Measure the resistance and compare it with the manufacturer's specification
4. Check the control signal with an oscilloscope; on direct injection or diesel engines, leave this to a repair shop because of the high voltages
5. On diesels, check the per-cylinder injection corrections

Good to know

• Repair difficulty: hard
• It can trigger limp mode.
• It affects emissions.

What each character of P216D means

• P: Powertrain: engine and transmission
• 2: Generic code: same on every make
• 1: Air and fuel
• 6D: Specific fault in that system

Frequently asked questions

Can I keep driving with code P216D?

Drive as little as possible and go to a repair shop. If you smell fuel or the engine is shaking badly, do not keep driving.

What causes code P216D?

The most common causes are: injector harness rubbed through on V6 engines; water in the bank 2 injector harness connector (Corvette LT6); cylinder 6 injector shorted.

Related codes

• P216EFuel Injector Group F Supply Voltage Circuit Low
• P216FFuel Injector Group F Supply Voltage Circuit High
• P216AFuel Injector Group E Supply Voltage Circuit/Open
• P217DFuel Injector Group H Supply Voltage Circuit/Open
• P0206Cylinder 6 Injector A Circuit/Open
• P0306Cylinder 6 Misfire Detected

Sources

• gsi.ext.gm.com: 24OBDG07
• gsi.ext.gm.com: 08 GRP02 LLT Engine
• static.nhtsa.gov: MC 10112007 9999
• static.nhtsa.gov: MC 11009469 0001

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.