A logged P0203 can cause your vehicle to exhibit symptoms, such as an illuminated check engine light, decreased engine performance, and increased fuel consumption. Problems that could trigger this code include Fuel injector 3 damage or failure, wiring issues, and PCM failure.
P0253 Code. P0253 is widely known as the diagnostic trouble code for “Injection Pump Fuel Metering Control A Low (Cam/Rotor/Injector.”. This trouble code can be caused due to multiple reasons. Hence, in order to diagnose the specific cause for this code, there may be a need for you to hire professional help. If the ECM detects that fuel pressure isn’t rising sufficiently on command, it will set a diagnostic trouble code, DTC P0087, “Fuel Rail/System Pressure – Too Low,” and illuminate the malfunction indicator lamp (MIL). Concurrent DTCs may include cylinder misfire, air-fuel ratio sensor, or fuel trim codes. okCRw.