P0173Mitsubishi LancerYears: 1996 - 2026
Fuel Trim Malfunction (Bank 2)
Reviewed by ASE Certified Technician
What does this mean?
Code P0173 indicates a general fuel trim malfunction on Bank 2. The PCM cannot maintain the proper air-fuel ratio.
Disclaimer: This diagnostic code is part of the standard OBD2 system and can apply to Mitsubishi Lancer models manufactured from 1996 to 2026. However, please note that the presence of this specific code depends on your vehicle's exact engine configuration, options, and production year.
Advertisement (In-Article)
Common Causes
Vacuum leak in intake system
Dirty or contaminated MAF sensor
Clogged or faulty fuel injector
Faulty oxygen (O2) sensor
Faulty fuel pressure regulator
Symptoms to Watch For
- Check Engine Light is illuminated
- Rough or unstable idle
- Decreased fuel economy
- Hesitation or stumble during acceleration