P0202 Code: Injector Circuit Malfunction - Cylinder 2

🟠 Moderate severity · drivable

Drivable short-term, but cylinder 2 may misfire and raw fuel can hurt the catalytic converter — fix it soon.

What P0202 means

The engine computer has flagged an electrical fault in the fuel injector circuit for cylinder 2, meaning it can't control that injector. This is a wiring/circuit issue rather than a fuel-pressure problem, and it frequently appears together with a cylinder 2 misfire (P0302) because that cylinder isn't being fueled correctly.

Symptoms

Check engine light on (may flash)
Rough idle or misfire on cylinder 2
Loss of power
Poor fuel economy

Common causes

most common: Faulty fuel injector on cylinder 2 (internal electrical fault)
common: Damaged wiring or a loose connector at the cylinder 2 injector
less common: Injector driver failure in the engine computer (PCM)

How to fix it

Fix	DIY?	Typical cost
Test the cylinder 2 injector circuit with a noid light	Yes	$10–30
Swap the cylinder 2 injector to another cylinder to confirm the fault follows it	Mechanic	$100–300
Replace the cylinder 2 fuel injector	Mechanic	$100–300
Repair damaged injector wiring or connector	Mechanic	$50–150

Frequently asked questions

Is P0202 a wiring or fuel issue?

Wiring/circuit. P0202 means the injector circuit can't be controlled electrically. It often produces a cylinder 2 misfire (P0302) as a result.

How do I test a P0202?

Plug a noid light into the cylinder 2 injector connector. A flashing light means the computer is commanding the injector; no flash points to the wiring or computer driver.

Can I drive with a P0202?

Short distances only. Cylinder 2 may misfire, sending unburned fuel into the catalytic converter.

Related codes

P0302

P0302 Code: Cylinder 2 Misfire Detected

P0200

P0200 Code: Injector Circuit Malfunction

P0262

P0262 Code: Cylinder 1 Injector Circuit High

Updated 2026-08. This page is informational and not a substitute for professional diagnosis.