P0154 Fault in 2003 Mitsubishi Galant: Causes, Symptoms, and Fixes
I recently purchased a 2003 Mitsubishi Galant with 156,000 miles featuring a 3.0L V6 engine. After scanning the vehicle's system, I found fault code P0154. The car does not start consistently—sometimes it starts, but most of the time it fails to crank. The check engine light is illuminated, and occasionally white smoke is visible from the exhaust. My question: Does P0154 alone prevent the vehicle from starting? Could this be related to a faulty starter or wiring issues? I'm seeking reliable advice on diagnosing and resolving this issue. Any insights would be greatly appreciated.
P0154 does not typically cause a no-start condition. The issue is more likely related to wiring or electrical connections, especially in the starter circuit. Check all battery cables and ground connections for corrosion or looseness. White smoke from the exhaust is a concerning sign and may indicate engine overheating or a coolant leak—this should be investigated promptly. This fault code relates to a specific oxygen sensor (bank 2, sensor 4), but it does not directly affect starting. For more details on this system, refer to: http://www.revbase.com/BBBMotor/Wd/Down?ID=105493