Possible Causes
WARNING: This page is about a different car, the 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
DTC(s) will set when:
- For DTC P0120, detection conditions for DTCs P0122 and P0123 are not satisfied, but VTA1 is 0.2 volt or less, or VTA1 4.8 volts or more. Trouble areas would be: defective throttle position sensor (built in throttle body) or defective ECM.
- For DTC P0122, VTA1 is 0.2 volt or less. Trouble areas would be: defective throttle position sensor (built in throttle body), short in VTA1 circuit, open in VC circuit or defective ECM.
- For DTC P0123, VTA1 is 4.8 volts or more. Trouble areas would be: defective throttle position sensor (built in throttle body), open in VTA1 circuit, open in E2 circuit, VC and VTA1 circuit are short-circuited or defective ECM.
- For DTC P0220, detection conditions for DTCs P0222 and P0223 are not satisfied but VTA2 is 0.5 volt or less, or 4.8 volts or more and VTA1 is 0.2 volt less, or 1.8 volts or more. Trouble areas would be: defective throttle position sensor (built in throttle body) or defective ECM.
- For DTC P0222, VTA2 is 0.5 volt or less. Trouble areas would be: defective throttle position sensor (built in throttle body), short in VTA2 circuit, open in VC circuit or defective ECM.
- For DTC P0223, VTA2 is 4.8 volts or more and VTA1 is 0.2 volt or less, or 1.8 volts or more. Trouble areas would be: defective throttle position sensor (built in throttle body), open in VTA2 circuit, open in E2 circuit, VC and VTA2 circuit are short-circuited or defective ECM.
- For DTC P2135, VTA1 and VTA2 are 0.02 volt and continues for 0.5 second or more, or VTA1 is 0.2 volt or less and VTA2 is 0.5 volt or less and continues for 0.4 second or more. Trouble areas would be: VTA1 and VTA2 circuit are short-circuited, defective throttle position sensor (built in throttle body) or defective ECM.