P0203 CHEVROLET - Injector 3 Control Circuit
Faulty fuel injector 3
Fuel Injector 3 harness is open or shorted
Fuel injector 3 circuit poor electrical connection
When is the code detected?
If an electrical malfunction occurs in the fuel injector circuit for engine cylinder #3, the ignition feed driver signals the Powertrain Control Module (PCM) to set the P0203 code.
Engine Light ON (or Service Engine Soon Warning Light)
Lack/Loss of Power
The engine may be harder to start
P0203 Chevrolet Description
The Powertrain Control Module (PCM
) controls the fuel injectors by using an ignition feed driver and ground circuit within the PCM
. The driver has the ability to detect an electrical malfunction in the ignition feed or ground circuit.