P217BFuel Injector Group G Supply Voltage Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P217B reports the feed of injector group G as grounded, which on GM's direct-injection V8 engines is the injector of cylinder 7, at the rear of bank 1. GM's 2016 table 16OBDG07A and the 2018 LT4 table of the supercharged 6.2 V8 measure it with the driver switched on: if 25 A or more flows through the high side, the line is grounded somewhere. The check runs every 100 ms as soon as the battery has 11 V; 10 failures in 20 samples set the code as type A, so the MIL comes on in the same trip. Check the harness routing at the rear of the engine and the injector connector before suspecting the module. The module stops firing the injector, which shows up as a cylinder 7 misfire. P217C is the high fault, P217A the general one.
- What you may notice
- Check engine lamp on immediately
- Cylinder 7 misfire, reduced power
- Likely causes
- LikelyCylinder 7 feed wire grounded at the rear of the engine
- PossibleCylinder 7 injector shorted to ground
- 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 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.