Powertrain, generic (extended)

P217C Fuel Injector Group G Supply Voltage Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Cylinder 7 feed shorted to a powered wire
Damaged or wet injector connector
Engine control module driver fault

Symptoms

  • Check engine lamp on immediately
  • Cylinder 7 misfire

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–2,000
Time0.8–5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

fuel injectorinjector wiringengine control module

Related codes

P217AP217BP217FP0280P0307

References: gsi.ext.gm.com, gsi.ext.gm.com, gsi.ext.gm.com.