I own a 1999 Mitsubishi Eclipse Spyder Turbo with an OBD2 diagnostic code P1105. I would like to understand what this error code means and what components should be inspected or replaced. Can anyone provide guidance on troubleshooting steps or recommended repairs? Thank you.
The fuel pressure solenoid is likely the culprit. Use an ohmmeter to test its resistance—it should read between 30 and 40 Ohms. The red wire connected to the solenoid should have 12 volts when the key is on and the engine is off. If voltage is absent, the solenoid may need replacement.
I also have a 1999 Mitsubishi Eclipse Spyder Turbo with OBD2 code P1105. I checked for the fuel pressure solenoid as per my owner's manual, but did not find it located near the fuel tank under the seat. My OBD2 reader displays 'upper alternator failure' instead—this seems inconsistent. Could this be a misreading? Any advice on how to verify the actual code or locate the correct component?
It's possible that your OBD2 device is displaying an inaccurate description of the P1105 code. For accurate diagnosis, it’s recommended to consult a Mitsubishi dealership or use a certified diagnostic tool with proper vehicle-specific programming.
The P110-5 code typically indicates a fuel pressure regulation issue, which may stem from a faulty fuel pressure solenoid or related components.