P217E: Fuel Injector Group H Supply Voltage Circuit Low

P217E flags the supply of injector group H as grounded, on GM's direct-injection V8 engines the injector of cylinder 8. GM lists it for the 6.2 LT4 in 2018 and in its 2016 table 16OBDG07A. With the high-side driver switched on, a current of 25 A or more means the line has found a path to ground; at 11 V or more, 10 bad samples out of 20 taken at 100 ms set the code as type A and light the MIL right away. Since the per-cylinder low-side codes P0282 and P0283 cover the return line, this code points specifically at the feed wire, the injector body or the driver. A practical check is to unplug the module and the injector and measure the feed wire to ground before suspecting the module. The engine loses cylinder 8. P217F is the high fault.

Medium severity. Can I keep driving?Drive as little as possible and go to a repair shop. If you smell fuel or the engine is shaking badly, do not keep driving.

Symptoms

Check engine lamp on immediately
Cylinder 8 misfire, engine shakes

Most likely causes

Cylinder 8 feed wire chafed to ground
Cylinder 8 injector shorted to its housing
Engine control module output stage faulty

What to check, in order

Start with the simplest. You can tick off each step.

Check the connector and wiring of the injector indicated
With the connector unplugged, check whether the signal wire is making contact with ground.
Measure the resistance and compare it with the manufacturer's specification
Check the control signal with an oscilloscope; on direct injection or diesel engines, leave this to a repair shop because of the high voltages
On diesels, check the per-cylinder injection corrections

Good to know

Repair difficulty: hard
It can trigger limp mode.
It affects emissions.

What each character of P217E means

P: Powertrain: engine and transmission
2: Generic code: same on every make
1: Air and fuel
7E: Specific fault in that system

Frequently asked questions

Can I keep driving with code P217E?

Drive as little as possible and go to a repair shop. If you smell fuel or the engine is shaking badly, do not keep driving.

What causes code P217E?

The most common causes are: cylinder 8 feed wire chafed to ground; cylinder 8 injector shorted to its housing; engine control module output stage faulty.

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.