Having problems with your 2005 Pontiac Grand Prix ?

HELP!! Having electrical issues with my 2005 Pontiac

\015 Having electrical issues with my 2005 Pontiac Grand Prix GTP. Just received P0118 (Engine Coolant Temp) and P0243 (Supercharger Solenoid Fault) error codes. The Engine temp gauge no longer works, the ambient air temp display fluctuates 20 or 30 degrees, and the dome lights no longer work. The dome lights went out weeks ago. The temp gauge, the supercharger, and weird temp readings all seemed to happen at the same time. Anyone have a clue? \015\012\015\012Thanks,\015\012Chris\015 Posted / edited by AnonymousUser on : 18-06-2018

Answers :

Electical is hard to diagnose with out being there. i would treat each problem seperately. first you will need to test the engine temp gauge sending unit. in a dealership this is easy with a scanner they can run a sweep test to se if the gauges are responding.you don't want the engine to over heat if the gauge is not working. next problem the dome light should be easy to fixe does the dome light work with the dome switch?remove the bulb and with the doors open and switch on check for voltage, if voltage check connection and or replace bulb. if no voltage check fuses for voltage.last will need to have the dtc po243 checked out by a repair shop. i hope this will help.
My 2205 grand prix will not start all gauges are surging even when key is not in ignition this occurs when i open my car door any ideas?
Repair Help & Product Troubleshooting for 2005 Pontiac Grand Prix

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