2004 Suzuki Verona diagnosed with fuel trim bank 2 condition. Troubleshoot codes are P0174 and P017. Where should i begin the process of elimination.
My initial problem was lack of power during accelleration (check engine light on) so i got diagnostics test.... bad coil. I had it replaced and noticed significent improvement in power but soon thereafter (same day) check engine light on again but for different reason.
If the P0171 is combined with the P0174 code, it's very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replaced the air filter and clean the air flow meter. If the problem persist the front oxygen (O2) sensor may need to be replaced.
Possible causes -- Intake air leaks - Faulty front heated oxygen sensor - Ignition misfiring - Faulty fuel injectors - Exhaust gas leaks - Incorrect fuel pressure - Lack of fuel - Faulty Mass Air Flow (MAF) sensor - Incorrect Positive Crankcase Ventilation (PCV) hose connection
I had misfires in 4,5,6 + slow O2 sensor bank 2 S1. Replaced plugs coils and both upstream sensors, cleaned the MAS. Idles great but no power and misfires 4,5,6.. Suzuki says it's most likely clogged catalytic converter for bank 2 (rear)..
location o2 sensor bank1 sensor1 2004 suzuki verona