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 P2098 Post Catalyst Fuel Trim System Too Lean (Sensor-2, Bank-2): Correction index of A/F (bank-2) feedback estimated based on HO2S (bank-2) signal is higher than correction upper limit for more than 10 sec. (2 driving cycle detection logic) DTC P2099 Post Catalyst Fuel Trim System Too Rich (Sensor-2, Bank-2): Correction index of A/F (bank-2) feedback estimated based on HO2S (bank-2) signal is lower than correction lower limit for more than 10 sec. (2 driving cycle detection logic)	Vacuum leakage Exhaust gas leakage Fuel injector malfunction HO2S and its circuit A/F sensor and its circuit Intake & exhaust valve clearance Intake & exhaust valve Valve timing ECM

DTC detecting condition

Trouble area

DTC P2098 Post Catalyst Fuel Trim System Too Lean (Sensor-2, Bank-2):
Correction index of A/F (bank-2) feedback estimated based on HO2S (bank-2) signal is higher than correction upper limit for more than 10 sec. (2 driving cycle detection logic)
DTC P2099 Post Catalyst Fuel Trim System Too Rich (Sensor-2, Bank-2):
Correction index of A/F (bank-2) feedback estimated based on HO2S (bank-2) signal is lower than correction lower limit for more than 10 sec.
(2 driving cycle detection logic)

Vacuum leakage
Exhaust gas leakage
Fuel injector malfunction
HO2S and its circuit
A/F sensor and its circuit
Intake & exhaust valve clearance
Intake & exhaust valve
Valve timing
ECM