Conditions for Running the DTC: P0135

WARNING: This page is about a different car, the 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

DTCs P0030, P0031, P0032 are not set.
The Ignition 1 Signal parameter is 10.5-18.1 volts.
No fuel injectors are shut down.
The engine has been OFF for more than 5 minutes.
The start-up engine coolant temperature (ECT) is more than -30°C (-22°F).
The engine is running.
OR
DTCs P0116, P0117, P0118, P0501, P0502 are not set.
The calculated exhaust temperature is more than 350°C (662°F).
The Ignition 1 Voltage parameter is 10.5-18.1 volts.