Code P0171 System Too Lean P0172 P0174 P0175 1GR-FE

Under closed-loop fuel control, fuel injection volumes that deviate from those estimated by the ECM cause changes in the long-term fuel trim compensation value. The long-term fuel trim is adjusted when there are persistent deviations in the short-term fuel trim values. Deviations from the ECM's estimated fuel injection volumes also affect the average fuel trim learned value, which is a combination of the average short-term fuel trim (fuel feedback compensation value) and the average long-term fuel trim (learned value of the air fuel ratio). If the average fuel trim learned value exceeds the malfunction thresholds, the ECM interprets this as a fault in the fuel system and stores a DTC. DTC P0175 System Too Rich (Bank 2)

DTC P0120 P0121 P0122 P0123 P0220 P0222 P0223 P2135 1GR-FE

DTC P0120 Throttle / Pedal Position Sensor / Switch "A" Circuit Malfunction DTC P0121 Throttle / Pedal Position Sensor / Switch "A" Circuit Range / Performance Problem DTC P0122 Throttle / Pedal Position Sensor / Switch "A" Circuit Low Input DTC P0123 Throttle / Pedal Position Sensor / Switch "A" Circuit High Input DTC P0220 Throttle / Pedal Position Sensor / Switch "B" Circuit DTC P0222 Throttle / Pedal Position Sensor / Switch "B" Circuit Low Input DTC P0223 Throttle / Pedal Position Sensor / Switch "B" Circuit High Input DTC P2135 Throttle / Pedal Position Sensor / Switch "A" / "B" Voltage Correlation
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