P217CFuel Injector Group G 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
- P217C means the group G injector supply, cylinder 7 on GM's direct-injection V8 engines, is pulled up to supply voltage. GM tests this while the high-side driver is off: if the line sits within 1 V of the controller supply, the module treats it as shorted to power. The tables 16OBDG07A (2016), 18OBDG03A for the 6.2 LT4 and 19OBDG03A apply the same counting of 10 failures out of 20 samples, 100 ms apart, at 11 V or more, and treat it as type A with immediate MIL. A wire rubbed against a powered circuit, a damaged injector connector and, more rarely, a faulty driver inside the module are the usual causes; a module fault often shows as several high codes at once. To protect the injector from staying open, cylinder 7 is shut off. P217B is the low counterpart, P217A the general code.
- What you may notice
- Check engine lamp on immediately
- Cylinder 7 misfire
- Likely causes
- LikelyCylinder 7 feed shorted to a powered wire
- PossibleDamaged or wet injector connector
- RareEngine control module driver fault
- 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.