P0203 - OBD II Trouble Code

Our automotive experts have put together the following information about the P0203 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P0203 code.

What Does P0203 Code Mean?

OBD-II Code P0203 is defined as a Injector Circuit/Open - Cylinder 3

The engine control module (PCM) has special transistors called "drivers" to turn the Fuel Injectors on and off in the Fuel Injection System. If the PCM cannot control the fuel injector, it will set code P0203.

P0203 Symptoms

• Decreased engine performance
• Increased fuel consumption

Common Problems That Trigger the P0203 Code

• Fuel injector failure
• Powertrain Control Module (PCM) failure
• Wiring issue

Common Repairs Needed for the P0203 Code

• Fuel Injector Replacement