Possible Causes
WARNING: This page is about a different car, the 2003 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.
This DTC uses two-trip detection logic. DTC is set when there is a small difference in the temperature between EGR gas temperature sensor and the ambient air temperature with engine at normal operating temperature and vehicle is driven at 50 MPH for 3-5 minutes. Possible causes are:
- EGR gas temperature sensor circuit is open or shorted.
- Defective EGR gas temperature sensor.
- Disconnected, defective or restricted EGR vacuum hose.
- EGR Vacuum Switching Valve (VSV) circuit is open or shorted.
- Defective EGR VSV.
- Defective EGR system.
- Defective EGR vacuum modulator.
- EGR valve is stuck closed.
- Defective ECM.