Circuit Description
WARNING: This page is about a different car, the 1995 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
See CODE P0401 - INSUFFICIENT EXHAUST GAS RECIRCULATION (EGR) FLOW DETECTED. Code is set when EGR gas temperature sensor value is high. Engine not yet at normal operating temperature. Possible causes are:
- EGR valve stuck open.
- EGR Vacuum Switching Valve (VSV).
- EGR VSV open circuit.
- EGR gas temperature sensor short circuit.
- ECM.