P2319: Ignition Coil G Primary Control Circuit High

P2319 sets when the coil G control line, belonging to cylinder 7 of a V8 or larger engine, shows a short to voltage. GM's 2019 tables include it for the LT5 Corvette V8 as a Type B code with 50 of 63 failed samples. Ford describes the protective reaction in detail: after a coil-driver fault the injector of that cylinder stays off for 30 s; on six- and eight-cylinder engines as many as two cylinders can be shut off at the same time. After the pause the injector is switched on again, and if the fault returns within about 0.1 s fuel is cut once more. Message 52455 from Ford (2024) on 6.8 and 7.3-litre trucks lists P2319 with the other codes that may point to the wrong cylinder; the real culprit is the cylinder that drops out in the power balance test without a code of its own.

Medium severity. Can I keep driving?Drive as little as possible. If you feel jerking or the light flashes, stop: a misfire can damage the catalytic converter.

Symptoms

Check engine light on
Cylinder 7 shut off for periods of 30 s (Ford)
Rough running and loss of power

Most likely causes

Coil G control wire shorted to a supply line
Internal fault in coil G
Code assigned to the wrong cylinder by PCM software (Ford SSM 52455)
Engine module output stage defective

What to check, in order

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

Check the connector and wiring of the coil indicated
Check the sensor's ground and make sure the signal wire is not receiving voltage from another circuit.
Check the condition of the spark plug
Swap the coil with another cylinder and see if the code changes
Measure the power supply and control signal using the manufacturer's wiring diagram

Good to know

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

What each character of P2319 means

P: Powertrain: engine and transmission
2: Generic code: same on every make
3: Ignition and misfires
19: Specific fault in that system

Frequently asked questions

Can I keep driving with code P2319?

Drive as little as possible. If you feel jerking or the light flashes, stop: a misfire can damage the catalytic converter.

What causes code P2319?

The most common causes are: coil G control wire shorted to a supply line; internal fault in coil G; code assigned to the wrong cylinder by PCM software (Ford SSM 52455).

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.