How to fix P0203 Code: Injector Circuit/Open Cylinder 3
A P0203 code is set when the computer (ECM/PCM) detects the voltage is not correct for the cylinder #3 fuel Injector.
The computer detects the injector high voltage control circuit is shorted to ground or open for greater than 2 seconds.
Causes include a broken wire, loose terminal, faulty injector, or some other circuit interruption issue with the #3 Fuel Injector Circuit.
Wiring schematics can often be found using Google images. Paid options are also available with links in the description below.
Possible Causes of a P0203 Code:
Bad Fuel Injector
Wiring Issues (Open - Short - Fuse)
Links to Paid Vehicle Info, Schematics, Diagrams, Repair Manuals, and More
Emanuals Online has automotive repair manuals that can be bought and viewed immediately on a computer.
(Likely best for home DIY person with 1-2 vehicles) Emanuals Online Link: [ Ссылка ]
All Data (Professional and DIY sections) Link: [ Ссылка ]
Mitchell Pro Demand (Professional) Link: [ Ссылка ]
By using this information, the user assumes all risks of use.
