P0403 (EGR Circuit Malfunction) & P0170 (Fuel Trim Malfunction) Airtrek

[Ss_Tuner]

Just sharing incase of any airtrekker have this issue.
Mostly have P0170 issues

P0403 (EGR Circuit Malfunction)
Possible cause
1)EGR solenoid Removed
2)EGR setting disable/enable via periphery

Possible Solution : Disable via ECUFLASH

P0170 (Fuel Trim Malfunction)
Possible cause
1)O2 sensor
2)Injector Scaling not correct.
3)Fuel Pump/Fuel Pressure Regulator setting not correct/weak
4)Too lean or rich idling/cruising.

Possible Solutions :
Check Fuelpump/fuelpressure at optimum level 3~4bar idle(vacuum off)
Rescale Injector Scaling STFT to be +/- 10% only
Check O2 sensor reading,change/clean(with wire brush) if no reading 0.1~0.9V please change.

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