DTC Detecting Condition and Trouble Area

WARNING: This page is about a different car, the 2006 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.

DTC DETECTING CONDITION CHART

DTC detecting condition	Trouble area
DTC P0174 System Too Lean (Sensor-1, Bank-2): Total fuel trim (short term + long term fuel trim) is larger than 127% for more than 20 sec, or short term fuel trim is larger than 130% for more than 30 sec. (2 driving cycle detection logic) DTC P0175 System Too Rich (Sensor-1, Bank-2): Total fuel trim (short term + long term fuel trim) is s smaller than 71% for more than 20 sec, or short term fuel trim is larger than 70% for more than 30 sec. (2 driving cycle detection logic)	Vacuum leakage Exhaust gas leakage Fuel pressure out of specification Fuel injector malfunction A/F sensor malfunction MAF sensor malfunction Intake & exhaust valve clearance Intake & exhaust valve Valve timing ECM

DTC detecting condition

Trouble area

DTC P0174 System Too Lean (Sensor-1, Bank-2):
Total fuel trim (short term + long term fuel trim) is larger than 127% for more than 20 sec, or short term fuel trim is larger than 130% for more than 30 sec.
(2 driving cycle detection logic)
DTC P0175 System Too Rich (Sensor-1, Bank-2):
Total fuel trim (short term + long term fuel trim) is s smaller than 71% for more than 20 sec, or short term fuel trim is larger than 70% for more than 30 sec.
(2 driving cycle detection logic)

Vacuum leakage
Exhaust gas leakage
Fuel pressure out of specification
Fuel injector malfunction
A/F sensor malfunction
MAF sensor malfunction
Intake & exhaust valve clearance
Intake & exhaust valve
Valve timing
ECM