P216FFuel Injector Group F Supply Voltage Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P216F is set when the group F supply, on GM petrol direct injection the high-side line of cylinder 6, shows voltage while the driver is off. GM's criterion in its 2016 (16OBDG07A) and 2018 LT4 tables is 1 V or less between the line and the controller supply, which means the wire is practically at battery level. At 11 V or more, 10 failures out of 20 samples at 100 ms store it as type A, MIL on the first trip. A short to power can keep current flowing through the injector or overload the driver, so the module disables that cylinder. Look for insulation damage where the harness meets brackets or the transmission, as described for the Impala in PI0631H, and for a connector bridged by moisture. Several high codes on different cylinders at once point to the module. P216E is the short to ground.
- What you may notice
- Check engine lamp on immediately
- Cylinder 6 misfire
- Likely causes
- LikelyCylinder 6 feed shorted to another powered wire
- PossibleEngine control module driver fault, especially with several high codes
- RareMoisture in the injector connector
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.