P217C code meaning
Fuel Injector Group G Supply Voltage Circuit High
Powertrain system Generic code P21xx codes Check engine light
What P217C means
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.
P217C at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor0.8 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P217C
- Check engine lamp on immediately
- Cylinder 7 misfire
Common causes of P217C
- Most likelyCylinder 7 feed shorted to a powered wire
- PossibleDamaged or wet injector connector
- Less likelyEngine control module driver fault
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Fuel injectorInjector wiringEngine control module
What each part of P217C means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 1 | Area: fuel and air metering. |
| 7C | The exact fault in that area. |
What to do next
- Note P217C and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P217C
What does P217C mean?
P217C means "Fuel Injector Group G Supply Voltage Circuit High". P217C means the group G injector supply, cylinder 7 on GM's direct-injection V8 engines, is pulled up to supply voltage. It is a generic code, so it means the same on every make.
Is it safe to drive with P217C?
Drive gently and only to a workshop. With P217C the car can go into limp mode (reduced power) to protect itself.
Will P217C fail an emissions test?
Yes, it can. P217C is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P217C to fix?
Difficulty: hard. A typical repair takes 0.8 to 5 hours of work. This is a job for a workshop.
Will P217C clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.