P216E: Fuel Injector Group F Supply Voltage Circuit Low

P216E marks the feed of injector group F, the cylinder 6 injector on GM petrol direct injection, as shorted toward ground. It therefore concerns GM V6 and V8 engines with direct injection. The 2016 3.6 LGX and the 2018 LT4 tables use a current test: with the driver on, 25 A or more through the high side counts as a short, and 10 failures in 20 samples taken every 100 ms at 11 V or more store a type A code with the MIL on the first trip. GM's PI0631H for the 2012 and 2013 Impala includes P216E among the circuits that a harness rubbing on the transmission can damage; GM adds that usually only one circuit is hit. Diagnosis compares the resistance from the injector 6 feed pin to ground with the module unplugged. P216F is the high fault.

Symptoms

• Check engine lamp on immediately
• Cylinder 6 misfire and loss of power

Most likely causes

• Cylinder 6 feed wire chafed through to ground
• Cylinder 6 injector shorted to ground
• Engine control module output stage faulty

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. With the connector unplugged, check whether the signal wire is making contact with ground.
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 P216E means

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

Frequently asked questions

Can I keep driving with code P216E?

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 P216E?

The most common causes are: cylinder 6 feed wire chafed through to ground; cylinder 6 injector shorted to ground; engine control module output stage faulty.

Related codes

• P216DFuel Injector Group F Supply Voltage Circuit/Open
• P216FFuel Injector Group F Supply Voltage Circuit High
• P216BFuel Injector Group E Supply Voltage Circuit Low
• P0276Cylinder 6 Injector A Circuit Low
• P0306Cylinder 6 Misfire Detected

Sources

• gsi.ext.gm.com: 16OBDG05 Engine Diagnostics
• gsi.ext.gm.com: 18OBDG03A Engine Diagnostics
• static.nhtsa.gov: SB 10043310 1492

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.