Powertrain, generic (extended)

P217A Fuel Injector Group G Supply Voltage Circuit/Open

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Group G only exists on engines with seven or more injector groups, in practice eight-cylinder engines with direct injection. GM's 2023 and 2024 summary tables (23OBDG07, 24OBDG07) name the cylinder 7 injector G and use P217A for a short on its high side: less than 0.5 ohm between the module pin and ground while the driver is off, or to the injector supply while it is on. Two such events with more than 9 V on the battery store the code within one trip. As with groups E and F, GM keeps open circuits on the separate per-cylinder injector codes, so the title's open wording is misleading on these engines. No bulletin naming this code was found. The injector is switched off, cylinder 7 misfires and the engine runs noticeably rough. P217B and P217C are the dedicated low and high codes.

Likely causes

Cylinder 7 injector feed shorted to ground or supply in the harness
Cylinder 7 injector shorted internally
Engine control module driver faulty

Symptoms

  • Check engine lamp on, cylinder 7 misfire
  • Rough running under load

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–1,500
Time1–5 h

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

Parts involved

fuel injectorinjector wiringengine control module

Related codes

P217BP217CP217DP0207P0307

References: gsi.ext.gm.com, gsi.ext.gm.com, law.cornell.edu.