Powertrain
generic / SAE
P0173
Fuel Trim Malfunction Bank 2
Fuel trims on bank 2 exceed adaptation limits in either lean or rich direction. The ECU cannot maintain stoichiometric mixture within calibrated boundaries.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number1 / 73
Possible causes
- Oxygen sensor bank 2 aged high
- Vacuum leak bank 2 side medium
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 100–600 €
- Estimated time: 0.5–3 h
- Component: oxygen sensor
- Component: mass air flow sensor
- Component: fuel injector
- Component: intake manifold
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012