P1244 Error Code Explanation and Solution

If your check engine light is on and a scan tool shows P1244, you’re not alone. This code usually means something’s off with the fuel injector driver circuit specifically for cylinder 4 in many vehicles. It’s not a vague “maybe something’s wrong” kind of alert. The engine control module detected a real electrical issue, and ignoring it could lead to misfires, poor fuel economy, or even damage over time.

What does P1244 actually mean?

P1244 is a manufacturer-specific trouble code. While OBD-II codes like P0300 are standardized across all cars, P1244 can vary slightly depending on your vehicle’s make. In most Ford, Lincoln, or Mercury models, it points to a problem in the fuel injector driver circuit for cylinder 4. That’s the part of the system that tells the injector when to spray fuel. If the signal is weak, missing, or shorted, this code pops up.

Why would I see this code?

You’ll typically get P1244 after the engine starts running rough, hesitating during acceleration, or showing reduced power. Sometimes it appears alongside misfire codes like P0304 (cylinder 4 misfire). Common triggers include:

A failing fuel injector
Damaged wiring or connectors near the injector
A faulty driver inside the PCM (Powertrain Control Module)
Corrosion or moisture in the harness

If you’ve recently done work under the hood like replacing spark plugs or cleaning the intake you might have accidentally disturbed a wire or connector.

What’s the worst mistake people make with P1244?

Replacing the fuel injector right away without checking the wiring. A new injector won’t fix a pinched wire or a corroded plug. Start by inspecting the connector at the injector and tracing the harness back toward the PCM. Look for melted insulation, bent pins, or signs of rodent damage. You can learn more about common diagnostic pitfalls in our breakdown of P1244 diagnostic code details.

How do I test for this properly?

Grab a multimeter and check for continuity between the injector connector and the PCM. Also measure resistance across the injector coil it should usually read between 10–16 ohms (check your service manual for exact specs). If the injector tests fine but the code returns, the issue may lie in the PCM’s internal driver circuit. Swapping injectors between cylinders can also help: if the code moves to another cylinder, the injector is likely bad.

Can I clear the code and just drive?

You can clear it, but if the underlying issue isn’t fixed, it’ll come right back. Worse, running with an unresolved P1244 can cause unburned fuel to wash down cylinder walls, diluting oil and accelerating wear. If you’re seeing symptoms like rough idle or loss of power, don’t ignore it. For a full walkthrough of possible fixes, see our guide on the meaning of code P1244.

Should I take it to a shop?

If you’re not comfortable testing circuits or reading wiring diagrams, yes. But if you’ve got basic tools and know how to use them, this is often a DIY-friendly repair. Just don’t guess test. Many shops will charge for diagnostics even if the fix is simple, so doing your homework first saves money. More troubleshooting steps are covered in our P1244 error code explanation section.

Any quick tips before I start?

Disconnect the battery before unplugging any connectors
Label wires or take photos before disconnecting anything
Check for Technical Service Bulletins (TSBs) some manufacturers issued recalls or updates for this code
Use dielectric grease on reconnected terminals to prevent future corrosion

And if you’re documenting your repair or making notes, you might want a clean, readable font like Roboto Mono for your printouts or digital logs.