P217FFuel Injector Group H 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
- P217F is the last code of the injector group series: the feed of group H, cylinder 8 on GM's direct-injection V8 engines, shows supply voltage although the high-side driver is switched off. GM's tables 16OBDG07A, 18OBDG03A for the 6.2 LT4 and 19OBDG03A set it when the line stays within 1 V of the controller supply, counting 10 failures out of 20 samples at 100 ms with 11 V or more, type A, MIL on the first trip. A short to power can hold the injector partly open or stress the driver, so the module cuts cylinder 8. Wiring that touches a powered conductor, moisture in the plug or a failing module output are the candidates; high codes on several cylinders together suggest the module. P217E is the short to ground, P217D the general fault.
- What you may notice
- Check engine lamp on immediately
- Cylinder 8 misfire, possibly rich running on bank 2
- Likely causes
- LikelyCylinder 8 feed shorted to a powered wire
- PossibleMoisture or corrosion in the injector connector
- RareEngine control module output stage faulty
- 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.